प्रचालन मन्वय उप- समसत की 173

18-ए, शहीद जीत स िंह मार्ग, कटवारिया िाय, नई सदल्ली- 110016 फोन:011-26513265 ई-मेल: [email protected] वेब ाईट: www.nrpc.gov.in

18-A, Shaheed Jeet Singh Marg, Katwaria Sarai, New Delhi-110016 Phone: 011-26513265 e- mail: [email protected] Website: www.nrpc.gov.in

भारत सरकार

Government of India

विद्युत मंत्रालय

Ministry of Power

उत्तर के्षत्रीय विद्युत सवमवत

Northern Regional Power Committee

िं: उ.के्ष.सव. ./प्रचालन/106/01/2020/ सदनािंक: /07/2020

विषय: प्रचालन मन्वय उप- समसत की 173वी िं बैठक का कायग ूची I

Subject: Agenda of 173rd OCC meeting.

प्रचालन मन्वय उप- समसत की 173वी िं बैठक का आयोजन वीसियो कॉन्फ्रें स िंर् के

माध्यम े सदनािंक 14.07.2020 को आउटेज बैठक के पश्च्यात सकया जाएर्ा । उक्त

बैठक की कायग ूची उत्ति के्षत्रीय सवद्युत समसत की वेब ाइट http://www.nrpc.gov.in

पि उपलब्ध है।

173rd meeting of the Operation Co-ordination sub-committee will be conducted

through Video Conferencing on 14.07.2020 after the outage meeting. The agenda of

this meeting has been uploaded on the NRPC web-site http://www.nrpc.gov.in.

The link and password for joining the meeting has already been mailed to

respective e-mail IDs.

Kindly make it convenient to attend the meeting.

( ौसमत्र मजूमदाि)

अधीक्षण असियिंता (प्रचालन)

सेिा में : प्रचालन समन्वय उप सवमवत के सभी सदस्य।

To : All Members of OCC

7000-41 12

mailto:[email protected]

http://www.nrpc.gov.in/




http://www.nrpc.gov.in.members/

http://www.shabdkosh.com/translate/%E0%A4%AA%E0%A5%8D%E0%A4%B0%E0%A4%9A%E0%A4%BE%E0%A4%B2%E0%A4%A8/%E0%A4%AA%E0%A5%8D%E0%A4%B0%E0%A4%9A%E0%A4%BE%E0%A4%B2%E0%A4%A8-meaning-in-Hindi-English

कायग ूची: उ.के्ष.सव. . की प्रचालन मन्वय उप- समसत की 173वी िं बैठक पृष्ठ 2 of 22

खण्ड-क: उ.के्ष.वि.स. Part-A NRPC

1. Confirmation of Minutes

The minutes of the 172nd OCC meeting which was held on 15.06.2020 and

16.06.2020 at NRPC Secretariat, New Delhi were issued vide letter of even number

dated 06.07.2020.

PGCIL has submitted that in 171st OCC meeting, OCC advised POWERGRID to

share the cost estimate towards SPS logic implementation at Bhadla (PG).

Accordingly, POWERGRID intimated the budgetary offer as Rs. 73,62,759 + 18%

GST in the 172nd OCC meeting and same was noted by the members.

POWERGRID has requested to include the reference of above discussion in the

minutes of 172nd OCC meeting and also submitted the budgetary offer related

document for SPS implementation at Bhadla (copy attached at Annexure-A.0)

The sub-committee may kindly deliberate and confirm the Minutes.

2. Review of Grid operations of June 2020

2.1 Supply Position (Provisional) for June 2020

State / UT Req. / Avl.

Energy (MU) Peak (MW)

Anticipated

Actual %

variation Anticip

ated Actual % variation

CHANDIGARH (Avl) 160 161 0.3% 360 363 0.8%

(Req) 210 161 -23.6% 410 363 -11.5%

DELHI (Avl) 3660 3109 -15.1% 6650 6314 -5.1%

(Req) 3250 3109 -4.3% 6200 6314 1.8%

HARYANA (Avl) 6030 5158 -14.5% 10840 10308 -4.9%

(Req) 5200 5158 -0.8% 9180 10308 12.3%

HIMACHAL PRADESH

(Avl) 899 806 -10.3% 1344 1423 5.9%

(Req) 720 806 12.0% 1310 1423 8.6%

J&K and LADAKH

(Avl) 1920 1263 -34.2% 3280 2267 -30.9%

(Req) 1810 1564 -13.6% 2380 2834 19.1%

PUNJAB (Avl) 6610 6733 1.9% 11870 12719 7.2%

(Req) 6130 6733 9.8% 11500 12719 10.6%

RAJASTHAN (Avl) 8580 7185 -16.3% 17280 12755 -26.2%

(Req) 6200 7199 16.1% 11390 12755 12.0%

UTTAR PRADESH

(Avl) 11550 11770 1.9% 20500 22110 7.9%

(Req) 11400 11872 4.1% 21000 22110 5.3%

UTTARAKHAND (Avl) 1074 1147 6.8% 1660 1942 17.0%

(Req) 1050 1147 9.2% 1670 1942 16.3%

NORTHERN (Avl) 42930 37331 -13.0% 70975 64885 -8.6%


REGION (Req) 37670 37749 0.2% 62300 65336 4.9%

As per above, negative / significant variation (≥5%) in Actual Power Supply Position (Provisional) vis-à-vis Anticipated figures is observed for the month of June-2020 in terms of Energy Requirement for Chandigarh, Delhi, Haryana, HP, UTs of J&K and Ladakh, Punjab, Rajasthan and Uttarakhand and in terms of Peak Demand similar variation is noted for Chandigarh, Haryana, HP, UTs of J&K and Ladakh, Punjab, Rajasthan, UP, and Uttarakhand.

These states/UTs are requested to submit reason for such variations so that the same can be deliberated in the meeting.

All SLDCs are requested to furnish provisional and revised power supply position in

prescribed formats on NRPC website portal by 2nd and 15th day of the month

respectively for the compliance of Central Electricity Authority (Furnishing of

Statistics, Returns and Information) Regulations, 2007.

2.2 Power Supply Position of NCR

NCR Planning Board (NCRPB) is closely monitoring the power supply position of National Capital Region. Monthly power supply position for NCR till the month of June 2020 is placed on NRPC website. (http://nrpc.gov.in/operation-category/power-supply-position/). Power supply position of NCR for the current financial year is as under:

0

2000

4000

6000

Ap

r-2

0

May

-20

Jun

-20

Haryana

PeakDemand(MW)

PeakMet(MW)

0

1000

2000

3000

Ap

r-2

0

May

-20

Jun

-20

Haryana

EnergyRequirement(MU)

EnergyAvailability(MU)

0200400600800

10001200

Ap

r-2

0

May

-20

Jun

-20

Rajasthan

PeakDemand(MW)

PeakMet(MW) 0

200

400

600

800

Rajasthan



http://nrpc.gov.in/operation-category/power-supply-position/

http://nrpc.gov.in/operation-category/power-supply-position/


3. Maintenance Programme of Generating Units and Transmission Lines

3.1. Maintenance Programme for Generating Units

The meeting on proposed maintenance programme for Generating Units for the

month of August 2020 is scheduled to be held on 14.07.2020 (Pre-Lunch session)

via video conferencing.

3.2. Outage Programme for Transmission Elements.

The meeting on proposed outage programme of Transmission lines for the month of

August 2020 is scheduled to be held on 14.07.2020 (Pre-Lunch session) via video

conferencing.

4. Planning of Grid Operation

4.1. Anticipated Power Supply Position in Northern Region for August 2020

The Anticipated Power Supply Position in Northern Region for August 2020 is as

under:

3400

3500

3600

3700

3800

3900

Ap

r-2

0

May

-20

Jun

-20

Uttar Pradesh

PeakDemand(MW)

PeakMet(MW) 2450

250025502600265027002750

Ap

r-20

May

-20

Jun

-20

Uttar Pradesh



0

2000

4000

6000

8000

Ap

r-2

0

May

-20

Jun

-20

Delhi

PeakDemand(MW)

PeakMet(MW) 0

1000

2000

3000

4000A

pr-

20

May

-20

Jun

-20

Delhi




State / UT Availability / Requirement

Revised Energy (MU)

Revised Peak (MW)

CHANDIGARH

Availability 210 370

Requirement 170 340

Surplus / Shortfall 40 30

% Surplus / Shortfall 23.5% 8.8%

DELHI


Requirement 3190 6100



HARYANA



Surplus / Shortfall 250 -590

% Surplus / Shortfall 4.1% -5.6%

HIMACHAL PRADESH





J&K and LADAKH





PUNJAB





RAJASTHAN





UTTAR PRADESH (Revised on 10-Jul-20)





UTTARAKHAND (Revised on 4-Jul-20)





NORTHERN REGION Availability 44153 69300



State / UT Availability / Requirement

Revised Energy (MU)

Revised Peak (MW)



SLDCs are requested to update the anticipated power supply position of their

respective state / UT for the month of August-2020 and submit the measures

proposed to be taken to bridge the gap between demand & availability, as well to

dispose of the surplus, if any, in the prescribed format.

5. Information about variable charges of all generating units in the Region

The variable charges detail for different generating units are available on the MERIT

Order Portal. All states/UTs are requested to submit daily data on MERIT Order

Portal timely.

6. Submission of breakup of Energy Consumption by the states

The updated status on the submission of energy consumption breakup is presented

below:

State Period of submitted data

Delhi Apr’18 – Apr’20

Haryana Apr’18 – Mar’20

Himachal Pradesh Apr’18 – Mar’20

Punjab Apr’18 – Jan’20

Rajasthan Apr-18 – May’20

Uttar Pradesh Apr-18 – Mar’20

All the remaining states / UTs viz., Uttarakhand, UTs of J&K and Ladakh and

Chandigarh are again requested to submit the requisite data w.e.f. April 2018 as per

the billed data information in the format given as under:

Category→ Consumption by Domestic

Loads

Consumption by

Commercial Loads

Consumption by

Agricultural Loads

Consumption by Industrial

Loads

Traction supply load

Miscellaneous / Others

<Month>

7. SPS for ICTs at 765 kV Unnao sub-station

SPS for evacuation of Anpara-D generation was envisaged during a meeting held on

06.05.2015 at NRPC Sectt. with representatives from UPRVUNL, POWRGRID,

NRLDC and NRPC. Thereafter, in the 118th OCC meeting the scheme was approved

for implementation and during the 34th TCC/ 38th NRPC meeting it was informed that

the scheme would be implemented by 25.01.2017.

The issue has been regularly pursued in the various OCC and TCC/NRPC meetings.


UP-SLDC vide letter dated 08.07.2020 has intimated that the mock testing of the

implemented SPS has been successfully conducted on 06.07.2020 and the detailed

report would be submitted after receiving the same from the concerned authority.

UPSLDC/ UPPTCL is requested to share the report of the mock test to the

committee.

8. SPS for ADHPL- Nalagarh Transmission Line

ADHPL vide letter dated 06.07.2020 has stated that CERC in petition No.

209/MP/2017 while considering the capacity constraint and over-utilisation of the

ADHPL- Nalagarh transmission line, has directed that -

“……. Special Protection Scheme (SPS) should be installed by Everest Power

Private Limited and other connected generators. The modalities of SPS shall

be decided by NRPC.”

While EPPL has already disconnected from the dedicated transmission system of

ADHPL on 03.12.2019, Phozal substation of HPPTCL is still connected and the

dedicated transmission system is in use by 24 MW Kanchenjunga Power Company

Ltd. and Himachal Pradesh State Electricity Board Limited for 27 MW after having

signed an agreement for 11.4 MW.

ADHPL vide letter dated 12.06.2020 and 16.06.2020 has requested HPPTCL for

installation of SPS system in the facilities of users using the dedicated transmission

line of ADHPL.

HPPTCL/ ADHPL may update.

9. Automatic Demand Management System

The status of implementation of ADMS which is mandated in clause 5.4.2 (d) of IEGC

by SLDC/SEB/DISCOMs is presented below:

State/ Utility Status

Punjab Not fully implemented.

At SLDC level, remote tripping of 100 feeders at 66 kV is possible.

At 11 kV feeder level, ADMS is to be implemented by Distribution Company. As per the information available with SLDC, for 50 feeders of 11 kV at Amritsar and Ludhiana, scheme was under finalization.

Further, deliberations are being held with M/s Siemens regarding use of separate Hardware/software/applications for implementing ADMS on 66 kV feeders where remote control (through SCADA) facility was available.

M/s Siemens has submitted the tentative cost for implementation of ADMS for which negotiations were being conducted.

Punjab may update.

Delhi Fully implemented by TPDDL, BRPL and BYPL.


State/ Utility Status

NDMC implementation was scheduled to be completed by 31.03.2020 but has been delayed.

May kindly update.

Rajasthan Under implementation.

LoA placed on 12.12.2018 with an execution period of 18 months for ADMS at the level of 33 kV feeders at EHV Substation of RVPN under SCADA / EMS part of project. Implementation would be completed by December 2020 and the supply has commenced.

ADMS functionality at 11 kV feeders from 33/11 kV substation is under the jurisdiction of the DISCOMs and matter is being perused with DISCOMs authorities

UP Not fully implemented.

Remote operation of 50 feeders at 132 kV level being operated from SLDC.

Further, deliberations were also being held with M/s Siemens.

For the down below network, issue taken up with the DISCOMs.

Haryana Not implemented.

HP 02 feeders could be operated from SLDC through manual intervention. Letter has been sent by HPSEB to HP-SLDC for making its operation automatic.

Members may update the status of implementation of scheme.

10. Follow-up of issues from previous OCC Meetings- Status update.

The updated status of agenda items is enclosed at Annexure-A.I.

All utilities are requested to update the status.

11. Agenda by NTPC regarding DC revision.

After RTM Implementation, Vide new Regulation effective from 01.06.2020, DC

Revision for Generators is effective from 7th or 8th Time block whereas as per IEGC

it was from 4th Time block.

Due to the changes in Regulation Generators are incurring huge DSM losses during

Unit forced Unit outage. Rihand#3 alone incurred Rs 45 lakhs DSM Loss on

13.06.2020 during Unit outage.

Therefore, it is requested that in case of Unit Outage earlier provision DC Revision

wef 4th time block may be restored.


खण्ड-ख: उ.के्ष.भा.पे्र.के. Part-B NRLDC

12. Lahal generation evacuation by HPPTCL:

Lahal pooling station was to be constructed by HPPTCL to facilitate evacuation of Bajoli Holi HEP and other SHEP in Himachal Pradesh. Due to the delay in the 400 kV level Lahal S/s as well as the Lahal to Chamera pooling 400 kV D/C line, HPPTCL, had proposed for an interim arrangement for evacuation of power from SHEP(Small Hydro Electric Projects) connected to 220/132/33kV Lahal station. HPPTCL had informed that it has completed the construction of 220 kV line (approx. 2kms in length) between Lahal and Budhil which shall facilitate in evacuation of SHEP.

In reference to above, meetings took place on 15.06.2020 and 26.06.2020 under chairmanship of Chief Engineer (PSPA-II) to discuss issues related to interim arrangement for evacuation of small hydro power through 220kV Lahal-Budhil line. In the aforementioned meetings, the possibility of evacuating power through 220kV Lahal-Budhil-Chamera3- Chamera Pool path was discussed. In the meeting it was also deliberated that only one circuit of Chamera3-Chamera Pool line is available for power evacuation having a section of approximately 1.5 Kms on ERS. It is to be noted that the line has twin moose conductor however, ERS section has Single Zebra conductor POWERGRID representative had informed that 360 MW can be evacuated on 220 kV CHamera Pool- Chamera-III line i.e. Chamera-3 (231MW), Budhil (70MW) and Lahal (26MW- revised capacity) along with overloaded generation (total = 360MW). This was attributed to low ambient temperature in the area where the portion of line has zebra conductor (on ERS). However, he had further requested for 2-3 hours shutdown to attend the high temperature spots in the line, which was not agreeable to NHPC and Budhil due to high hydro season. Loading pattern of ICTs at Chamera Pooling suggests that there is some MVAr flow as well (50-70MVAr). This means that ICT may get loaded upto 350MVA under some conditions. Since ICT rating is 315 MVA only, it was decided that SPS be designed


for this contingency and implemented by HPPTCL before evacuation of power through this path. NHPC representative has confirmed on email that due to some issues with unit-3, generation at Chamera-3 is not expected to go beyond 240-242 MW for the next 20-25 days. Further, M/S Greenko has informed that for the purpose of computing the transmission/ line losses Budhil portion of losses from Budhil to Chamera-3 220kV line needs to be capped at 0.19% based on historical data. M/s Greenko has also informed that UERC has asked HPPTCL to submit a petition for the interim arrangement. SPS to be implemented by HPPTCL is attached as Annexure-B.I. Mock-testing exercise for SPS was carried out by HPPTCL on 08.07.2020. Subsequently, on 09.07.2020, Budhil representative raised some concerns regarding sharing of line losses, DSM etc. (details of which are attached in Annexure-1). Pending approval of UERC, Injection by HP has been allowed by NRLDC at Budhil end considering the above methodology. If there is any change in loss % figure due to UERC orders then the deviation account can be revised accordingly. However, if there are any other pending issues between M/S Greenko Budhil and HPPTCL/HPSEBL/HPSLDC, then the same should be settled directly between Budhil (M/s Greenko) and HPPTCL/HPSLDC/HPSEBL. Any outcome of UERC Regulation has to be settled by HPPTCL/HPSLDC and M/s Greenko and also as per the undertaking given by HPPTCL(Annexure-1). Any legal issues arising due to the above that has to be taken care by HPPTCL/HPSLDC/HPSEBL and M/S Greenko. Based on the undertaking of MD, HPPTCL vide letter no. HPPTCL/C&M/Lahal Petition/2020-21-4009-14 dated 09/07/2020 and considering the importance of natural resources, bottled up SHEP generation of 26MW is allowed to be evacuated through 220kV Lahal-Budhil-Chamera III-Chamba transmission line since 09.07.2020. However, it was seen that 220kV Lahal-Budhil line was charged by HPPTCL on 3rd July 2020 without NRLDC code. The line was subsequently opened. On 6th July 2020, NRLDC issued code for charging of line, but at that time along with line, ICT was also charged at Lahal pooling station. These instances of charging transmission elements without NRLDC code is violation of grid code and may pose threat to system security. As deliberated in many previous OCC meetings, it is once again requested that all constituents shall connect/ disconnect transmission elements which lie under NRLDC jurisdiction only after attaining code for the same. HPPTCL may update. Members may like to discuss.

13. Reliability issues Summer 2020

In previous OCC meetings, NRLDC had requested SLDCs to share details of new network commissioned and results of studies carried out for assessing the TTC/ATC of state control area of Northern region for summer. During past few weeks, NR has


met very high demand even crossing ~68600MW on 02.07.2020. Reliability issues observed during this time are highlighted below (graphs attached as Annexure-B.II):

Delhi: As per last studies carried out by Delhi SLDC and NRLDC, TTC limit was

assessed as 6800MW. Considering reliability margin of 300MW, ATC limit comes

out 6500MW. Simulation studies suggested N-1 non-compliance at 400/220kV

Mundka and Bamnauli ICTs.

It was observed that during this time loading of Bamnauli ICTs were above their N-1

contingency limit for short duration of time. Delhi SLDC to share actions being taken

by them to control loading of lines and ICTs at the time of high demand.

Uttar Pradesh: Simulation studies were performed after incorporating network

changes given by UP. NRLDC had assessed ATC/ TTC limit of UP state control

area which was also communicated to UP SLDC as:

State State Generation TTC RM ATC

UP

9000 14500 600 13900

9500 14200 600 13600

10000 13900 600 13300

10500 13700 600 13100

11000 13300 600 12700

Simulation studies based on data provided suggest N-1 non compliances at

400/220kV Agra(PG), Sarnath and 400/132kV Mau ICTs. Studies also suggest high

loading of 400/220kV Agra-UP, Greater Noida, Meerut and Allahabad-PG ICTs.

TTC/ATC of UP state control area depends on its own generation scenario and

would increase/decrease depending upon internal generation.

This year UP has met maximum demand of 22,370 MW on 02.07.2020 at 22:30

hrs. In real time, loadings above N-1 contingency limits were observed at Sarnath

and Agra (PG) ICTs. Further, with outage of one 315MVA ICT, N-1 non-compliance

issue is present at Agra (UP).

Haryana: TTC/ ATC limits were initially assessed by NRLDC as 7500MW/ 6900MW

respectively with N-1 non-compliance at 400/220kV Dipalpur and Panipat ICTs.

220kV lines from Hisar, Lula ahir, Abdullapur etc. were heavily loaded. Haryana

SLDC had assessed their TTC/ATC limit as 7900MW/ 7300MW. In real-time also

under import of 6500-7000MW, loading of400/220kV Deepalpur, Sonepat, Kabulpur

and Panipat (BBMB) ICTs are high (above N-1 limits occassionally).

Punjab: ATC/TTC limits of Punjab state control area were revised to 6600/7200

MW on submission from Punjab SLDC that generation at TalwandiSaboo would not


be upto full capacity, and would generally be around 1500MW.Simulation studies

suggested N-1 non-compliance at 400/220kV Amritsar and Rajpura ICTs. On

managing loading at these ICTs, next severe contingency would be N-1 of

400/220kV Ludhiana, Nakodar, Moga and Makhu ICTs.

Punjab has started to supply agricultural (paddy) load from 10.06.2020. With this,

import of Punjab is close to its ATC limit of 6600MW. Loading at Amritsar and

Rajpura ICTs is above N-1 contingency limits while that of Ludhiana, Moga and

Nakodar ICTs is close to N-1 contingency limit. Although, SPS has been

implemented by PSTCL at Rajpura TPS, Punjab SLDC is requested to manage

loading of ICTs below N-1 contingency limits as this limit of TTC/ATC was agreed

on confirmation from Punjab SLDC that they shall manage loadings of ICTs below

N-1 contingency limit.

Rajasthan: N-1 non-compliance at Akal, Jodhpur, Chittorgarh and Merta ICTs.

High loading of ICTs at Akal is being observed leading to constraints in evacuation

of renewables. As highlighted by NRLDC on previous many occasions, there is

need for additional reactive power support at Akal. As can be seen from the voltage

profile at Akal there is huge variations i.e. from 380-420kV even in a single day.

Apart from this loading of 400/220kV ICTs at Chittorgarh, Jodhpur and Merta is

seen to be above N-1 contingency limit for considerable duration of time. Rajasthan

SLDC may please inform about actions being taken at their end to manage the

loading of these ICTs.

ATC/TTC of other states as last calculated by NRLDC is shown below:

State State Generation TTC RM ATC

J&K and Ladakh Low Hydro 1800 300 1500

HP High hydro 1000 150 850

Low Hydro 1200 150 1050

Rajasthan 9500 5400 500 4900

7000 6800 500 6300

Uttarakhand Low Hydro 1600 200 1400

All states are requested to share the ATC/TTC calculations done at their end with

NRLDC.

Members may like to discuss.

14. Solar eclipse 21 June 2020:

India experienced annular solar eclipse on 21st June 2020. Annularity was visible in

the states of Rajasthan, Punjab, Haryana, Himachal Pradesh, Uttarakhand with

maximum obscuration of around 99% and other parts of country experienced partial

solar eclipse.


Actual generation pattern was almost similar to that estimated by NRLDC for 21st

June 2020. Further, the forecasted ramp up and ramp down rates were observed to

match with the actual ramp up and ramp down rate.

TIME FORECAST (MW)

ACTUAL (MW)

10.09 HRS 4194 4208

11.47 HRS 465 378

13.51 HRS 4851 4990

FORECAST (MW/min)

ACTUAL (MW/min)

RAMP DOWN 40 40

RAMP UP 40 41

The solar generation of Northern region started reducing from 10.21 Hrs onwards. Reduction of around 3900 MW observed from 4266 MW at 10.18 Hrs to 363 MW at 11.51 Hrs which is the maximum eclipse time. Compared to previous day, generation difference of around 4618 MW was observed at 11.51 Hrs.


Northern region Hydro generation was optimized to meet the reduction in solar generation. NR Hydro generation was increased by 3000 MW from 13000 MW at 10.00 Hrs to 16084 MW at 11.51 Hrs. Further one module each in Anta, Auraiya and Dadri stations in RLNG fuel were brought on bar under RRAS support to make up the generation reduction due to solar eclipse.

The frequency although slightly on the higher side continued to remain quite stable during the eclipse duration as shown below:


All utilities have contributed in handling the eclipse considerably well by taking necessary actions. NRLDC would like to thank all members of OCC for extending their cooperation during the event. This is for kind information of the members.

15. Load crash event on 05.07.2020:

On 04.07.2020 and 05.07.2020, number of element trippings and huge reduction in

demand were reported in Northern region. The demand started to decline from

15:00hrs and a demand reduction of ~20GW was observed as compared to previous

day in night hours.

Even after support from constituents of Northern region, it was seen that frequency

continued to remain above the band for most of the time due to under drawl. As is

visible from the frequency plot. The frequency remained above IEGC band

continuously during the night hours.


As reported, stormy weather condition prevailed in Northern region leading to the

tripping of multiple elements on various faults as well less demand in Northern region.

Due to this unprecedented condition, there was heavy under drawl by Haryana,

Punjab and Delhi. Preliminary report prepared by NRLDC is attached as Annexure-

B.III.

Utilities are requested to submit the detailed report on load crash within 5 days

considering the following points:

Load Crash (in MW) in the State

Analysis of Thermal Generation backing down in the state (till technical

minimum or not, if not than reason of the same needs to be discussed)

Analysis of fast ramping down of state generation during reduction in demand

met.

Reason of large deviation from the schedule

Line tripping & tower collapse (132 kV and above)

Line manually opened on high voltage in state Grid

Future remedial measures (Improvement in action taken for future)

It has been discussed in various OCC/one-to one meetings with SLDCs to have a

separate Weather monitoring screen at SLDC control room. The dedicated screen

would help in continuous monitoring of weather and hence help in taking proactive

decisions in real time system operation.

It is also being observed that some generating units under state control area are

being ramped down upto only 70-75% of their capacity. It has been previously

deliberated in several OCC/TCC/NRPC meetings that states shall ensure that

generators are backing down upto 55% or 60% (if some design issue). SLDCs may

also approach SERC in this regard.

Members may please like to discuss.

16. Reporting of DR/EL and detailed report (TR) on web based tripping portal:


Tripping details like FIR (First Information Report), DR (Disturbance Recorder), EL (Event Logger) and TR (Tripping Report or detailed report) played an important role for final conclusion of the tripping and lessons learnt. Thatswhy utility has to submit the FIR, DR, EL and detailed report to respective RPC/ RLDC/ SLDC within 24hrs of occurrence of the event which is also a regulatory requirement as per IEGC 5.2 (r) quoted below:

“All users, STU/SLDC and CTU shall send information/data including disturbance recorder/sequential event recorder output to RLDC within [24 hours] for purpose of analysis of any grid disturbance/event. No user, SLDC/STU or CTU shall block any data/information required by the RLDC and RPC for maintaining reliability and security of the grid and for analysis of an event” For centralized and better monitoring, web based tripping portal was developed by NRLDC-POSOCO and NRLDC started uploading the tripping list on this portal. In this regard, information’s like link, login details and passwords were earlier shared to all the NR constituents through mail and during discussion in 165th OCC meeting. A detailed presentation was also made in 165th OCC meeting about tripping portal and data/ report submission procedure. The link of the tripping portal is http://103.7.128.184/Account/Login.aspx. Each utility can login through their respective login ID and password, and download the data submission procedure by referring help section. However for reference data/ report submission procedure is once again attached as Annex-B.IVa Despite various communications and follow up from NRLDC/ NRPC, reporting status is still not satisfactory and needs improvement. Consolidated status report of non-submission of FIR, DR/EL and TR for the period of Apr-Jun 2020 (updated on 01 Jul 2020) is attached as Annex-B.IVb As discussed in the 172nd OCC meeting, details furnished on tripping portal shall only be considered for reporting to NRPC/CERC. Members may like to discuss.

17. Frequent forced outages of transmission elements in the month of June’20:

The following transmission elements were frequently under forced outages during the

month of June’20:

S. NO. Element Name No. of forced

outages Utility/SLDC

1 800 KV HVDC Kurukshetra(PG) Pole-1

7 POWERGRID

2 800 KV HVDC Kurukshetra(PG) Pole-

2 7 POWERGRID


3 4 POWERGRID

http://103.7.128.184/Account/Login.aspx



4 3 POWERGRID

5 400 KV Akal-Kankani (RS) Ckt-2 4 Rajasthan

6 400 KV Aligarh-Muradnagar_1 (UP)

Ckt-1 4 UP

7 400 KV Rajwest(RW)-Kankani (RS)

Ckt-1 4 Rajasthan

8 765 KV Bhadla-Bikaner (PG) Ckt-2 3 POWERGRID

9 400 KV Agra-Unnao (UP) Ckt-1 3 UP

10 400 KV Aligarh-Sikandrabad (UP)

Ckt-1 3 UP

11 400 KV Jodhpur-Kankani (RS) Ckt-2 3 Rajasthan

12 400 KV Panki-Aligarh (UP) Ckt-1 3 UP

The complete details are attached at Annexure-B.V. Frequent outages of such

elements affect the reliability and security of the grid. Hence, utilities are requested to

look into such frequent outages and share the remedial measures taken/being taken

in this respect.


18. Multiple element tripping events in Northern region in the month of June’20:

A total of 29 grid events occurred in the month of June’20 of which17 are of GD-1

category. The preliminary report of all the events have been issued from NRLDC. A

list of all these events along with the status of details received by 05-July-2020 is

attached at Annexure-B.VI.

Further, despite persistent discussions/follow-up in various OCC/PCC meetings, the

compliance of the regulations is still much below the desired level.

Maximum Fault Duration is 800ms in the event of multiple element tripping at

400/220 kV Muradnagar_1(UP)on 07-June-20 at 10:50hrs.

Delayed clearance of fault (more than 100ms for 400kV and 160ms for 220kV

system) observed in total 4 events out of 29 grid events occurred in the month.

Members may take expeditious actions to avoid such tripping in future and discuss

the same. Moreover, utilities may impress upon all concerned for providing the

Preliminary Report, DR/EL & Detailed Report of the events in line with the

regulations.



19. Details of tripping of Inter-Regional lines from Northern Region for June’20:

A total of 30 inter-regional lines tripping occurred in the month of June’20. The list is

attached at Annexure-B.VII. Out of 30 number of trippings, 28 tripping incidents is

related to HVDC system. The status of receipt of preliminary reports, DR/EL within

24hrs of the event and fault clearing time as per PMU data has also been mentioned

in the table. The non-receipt of DR/EL & preliminary report within 24hrs of the event

is in violation of various regulations. As per regulations, all the utilities shall furnish

the DR/EL, flag details & preliminary report to RLDC/RPC within 24hrs of the event.

They shall also furnish the detailed investigation report within 7 days of the event if

fault clearance time is higher than mandated by CEA (Grid Standard) Regulations.

Members may please note and advise the concerned for taking corrective action to

avoid such trippings as well as timely submission of the information.

20. Frequent wind generation tripping in Rajasthan control area

Details of some recent incidents where wind generation has tripped are as below:

SCADA plots for above mentioned trippings are attached herewith for reference (Annexure-B.VIII). Sudden generation trippings involving such huge quantum poses a serious risk to the Grid

stability and security and needs to be analysed and prevented in future. Same has also

been deliberated in 172nd OCC meeting wherein Rajasthan SLDC was asked tosubmit

detailed reports for wind related trippings that are taking place in Rajasthan state control

area.

Rajasthan SLDC is once again requested to kindly share investigation report along with

necessary DRs and EL so that any maloperation of protection system and/ or LVRT can be

pointed out and corrective actions can be taken in order to avoid such incidences in future.

A video-conference meeting may also be proposed in coordination with NRLDC involving

substation engineers, wind developers after compilation of tripping reports to assess the

real issues and take necessary actions.


21. Ensuring reliability of the network:

S.No Date and time of

tripping Quantum of generation tripped

(MW)

1. 03.06.2020/ 17:08:15 400 MW

2. 05.06.2020/ 05:13:00 1086 MW

3. 26.06.2020/ 02:53:13 635 MW

4. 27.06.2020/ 09:44:00 478 MW

5. 28.06.2020/ 10:30:18 524 MW


Recently, it has been observed that trippings of large number of transmission lines is

taking place during thunderstorms either due to structural damage or due to faults. Such

tripping lead to critical condition of grid and near-miss situation for reliable power system

operation.

It is necessary to analyze the reason for tower collapse incidents and ensure necessary

preventive maintenance activities to minimise such tripping. Letter from Director (System

Operation), POSOCO in this regard is attached as Annexure-B.IX.


22. Frequent tripping/ blocking of poles of HVDC Champa-Kurukshetra inter-

regional link:

±800kV 6000MW HVDC Champa-Kurukshetra four poles are important high capacity corridor between NR (Northern Region) & WR (Western Region). Northern Region is drawing power from this corridor for most of the time and this link is very important for secure and reliable grid operation of NR. However, during last two months i.e. in May and June 2020, total 43 nos. of trippings have occurred (Annexure-B.X). As you are aware that summer and monsoon season is high demand period for Northern Region and therefore high import requirement exists from other regions. Thus, the HVDC Champa-Kurukshetra inter-regional link becomes very important for fulfilling Northern Region demand requirement. On 28th May & 11th June 2020, all four poles of HVDC tripped simultaneously which is credible contingency for system operation. Tripping of other important links may create grid disturbance during such aforesaid events. HVDC is an important tool under system operator’s control to manage the grid reliability& security. But, operator is losing its control due to frequent tripping of high capacity corridor HVDC Champa-Kurukshetra. POWERGRID-NR2 shall apprise about the exact reason of frequent trippings and

remedial measures taken and to be taken along with completion time to avoid further

trippings.

23. Outage verification of New elements created either through LILO or

upgradation:

Following transmission lines were commissioned in the month of Mar-2020 and Apr-

2020:

1. LILO of 400kV D/C Gurgaon-Manesar line was carried out at Sohna Road(GPTL)

and LILOED line i.e 400 kV Gurgaon –Sohna road & 400 kV Sohna road-Manesar

were charged on dated 09.03.2020 & 11.03.2020 respectively .

2. 765kV Meerut-Koteshwar-1 was charged on 10.04.2020. Earlier, this line was

charged at 400kV level.

The transmission licensee has not submitted the outage details of new lines i.e. 400

kV Gurgaon-Sohna road and 400 kV Sohna road-Manesar for the period 10.03.2020

to 31.03.2020 and 12.03.2020 to 31.03.2020 respectively.


Further for 765 kV–Meerut Koteshwarckt 1 also the outage for period 11.04.2020 to

30.04.2020 has not been submitted. The transmission licensee has submitted outage

details for above mentioned lines from the first day of the next month i.e. 1stApril for

400 kV lines and 1st May for 765 kV line. (Annexure-B.XI)

NRLDC is yet to receive any communication regarding decommissioning of old

transmission lines. Transmission Licensee may explain the reason for non-

submission of outage details for the above mentioned period for new transmission

lines.


24. Upgradation of Operating procedure of NR

It was deliberated in 172nd OCC that NRLDC is updating the document “Operating

procedure of Northern region”. As per Indian Electricity Grid Code (IEGC), in respect

of demand control, all efforts must be made to avoid situation of low frequency. The

chapter on demand estimation and control may be referred for this purpose. Hon’ble

CERC in its order in petition no 125/MP/2012 also directed to have the list of radial

feeders which can be opened on the directions of NRLDC to regulate the demand.

List of such radial feeders has been provided by respective utilities and is part of

‘Operating Procedure of Northern Region’. Latest updated document is available at

https://nrldc.in/download/operating-procedure-of-northern-region-

july2019/?wpdmdl=7054.

In view of continuous network change and high demand period during summer, it is

desirable to have updated list of feeders. Thus, each state control area was

requested to update the information of feeders that can be used for demand

regulation by NRLDC (in addition to action by SLDC), so that same can be updated in

operating procedure.

A letter having reference: NRLDC/SO-II/OPR, Dtd: 15.06.2020 was also sent to all

the states to submit this information.

Up to now only Rajasthan and Himachal Pradesh have provided the information

regarding feeders for physical regulation. Other states are also requested to kindly

provide above sought information asap.

All states are also requested to share updated Under voltage load relief settings

implemented in their respective control areas.

https://nrldc.in/download/operating-procedure-of-northern-region-july2019/?wpdmdl=7054

https://nrldc.in/download/operating-procedure-of-northern-region-july2019/?wpdmdl=7054

Annexure-A.0

QUOTATION

Basic RateAmount

INR INR

Supply 4,825,000 1 NO 4,825,000

Erection & Commissining 525,000 1 NO 525,000

5,350,000

Synergy Systems & Solutions A-1526, Green Fields Colony

FARIDABAD - 121001-HARYANA

Contact No.:+91 129 2510501, Telefax No.: +91 1292510399

[email protected]|Website-www.s3india.com

Tax Registration NumbersGST No. 06ADOPA2627C1Z2

PAN No. ADOPA2627C

ECC Code ADOPA2627CEM001

POWERGRID, BHADLAQuotation No.:

P20/SPS/20200615/001

Project: Budgetary Quotation for SPS system at POWERGRID,Bhadla

Kind attention: DGM (AM). NR-I POWERGRID

Dear Sir,

With reference to the above we are pleased to submit our Budgetary quotation for the SPS system as per annexure -1

SL.

No.Description Qty. Unit

1

Supply, Erection, Testing & Commissioning of SPS System at PG, BHADLA.

Total: INR Fifty Three Lacs Fifty Thousand only. 5,350,000

For Synergy Systems & Solutions

Jitendra Singh

(Sr. Project Engineer)

Total: INR Fifty Three Lacs Fifty Thousand only.

Terms & conditions:

1. Payments terms:

80% of supply portion on supply of material within 30 days and material delivery at site.

20% of supply portion and 100% of erection portion on commissioning of the system.

2. Duties & Taxes:

GST@18% Extra on the above prices.

3. Project delivery :

Six (6) Months from the date of LOA (Letter of Acceptance).

4. Commissioning Period:

Four (4) Months from the date of LOA (Letter of Acceptance).

5. Warrenty Period: 1 Year.

6. Offer Validity: 3 Months

Other terms & Conditions: 1.

Cabling would be provided as per attached BOM (Annexure -1). if any requirement of extra cable would be chargeable extra.

Page 1 of 1

Annexure-1

Technical Specification of Special Protection Scheme for POWERGRID

POWERGRID envisages implementation of SPS Scheme for 765/400 Sub-Station, Bhadla.The

need for implementation of SPS arises out of the fact that routes available for evacuation of

Power from POWERGRID are currently highly constrained. Therefore failure of any equipment

on downstream side immediately requires tripping of 220 kV lines connected to solar

generators on rotational basis (generation above 350 MW)

The SPS Scheme would be implemented using RTU/PLC & SCADA System. The terms RTU and

PLC has been used synonymously in this document and either of the two can be utilized for the

purpose as long as the functionality specified below is achieved.

Logic for Bhadla SPS Scheme:

A. Breaker opening of 765 kV Bhadla (PG)-Bikaner both ckts from Bhadla (PG) End

OR Logic B. Breaker opening of 765 kV Bhadla (PG)-Bikaner both ckts from Bikaner (PG) End

OR Logic C. 765/400 kV 1500MVA all three ICTs power flow became zero. AND Logic (output of above all

three conditions is D)

E. Power Flow on 400 kV Bhadla (PG)-Bhadla (Raj) D/C is more than 350MW. The final outcome

is F

On the basis of Outcome F = 1: Tripping of 220 kV lines connected to Solar

Generators on Rotational basis (Generation above 350MW).

Note: Action shall be achieved within 200ms.

Logical OR Gate

Logical AND Gate

A

B

C

D

F=1

E

Tripping of 220 kV lines connected to

Solar Generators on Rotational basis

(Generation above 350MW)

RTUs/PLCs will be utilized for sensing of various field conditions and for implementation of

various logics. The RTU at 765/400 kV sub-station will be installed in control room of

POWERGRID. It will monitor the status of breaker opening of 765 KV bhadla (PG)-bikaner both

circuit at bhadla end, breaker opening of 765 KV bhadla (PG)-bikaner both circuit at bikaner

end, Power flow of all three ICTs (765/400 kV) and Power flow on 400 kV bhadla (PG)-bhadla

(Raj) is more than 350 MW. It will generate trip commands for 220 kV lines connected to Solar

Generators on Rotational basis Phase-1 units. The RTU in control room at PG is the one which will

possess the centralized intelligence for implementation of SPS.

A Main SCADA Server computer will be installed in 400 Control Room. SCADA server Computers

will be loaded with SCADA software for all visualization, monitoring and control over SPS. All

details related to actions taken automatically by SPS shall be stored in the SCADA Server

Computer. The SCADA Server will communicate with RTU over Modbus TCP/IP communication.

SPS should have watch dog electronics to monitor its healthiness. Watchdog electronics should

give annunciation through audible as well as visual alarm so that corrective measure may be

ensure manually and timely

• Whenever SPS operates, Audio/Visual annunciation is to be provided.

SPS system Schematic Diagram as per attached Annexure-2

1. Data Acquisition:

RTU/PLC will acquire data from its local site as follows:

1. Digital Input Status such as Open / Close Status of Main & Tie Circuit Breakers. Each

signal will be acquired through hardwiring of relevant contacts available in the existing panels

at Sub-Stations.

2. Digital Output Command (Tripping will be executed through Digital Output cards of

the RTU/PLC. Decisions for Tripping will be taken by the logic to be implemented

inside RTU/PLC. A time stamped event with millisecond resolution is raised by SPS

system whenever any tripping is initiated by SPS. These events should be viewable on

SPS monitoring computer to be provided as part of the contract.

Last 15 no of events should be shown on SPS monitoring computer with accurate date

(DD/MM/YYYY), Time (hr:mi:sec: millsec) and description and event number. Event

should be recorded with all the details every time.

3. MW Readings of ICTS. will be sensed using MW Transducers. For this purpose, CT and

PT connections would be wired to the transducers. These transducers will convert the

MW values to proportionate 4-20mA signals which will be wired to the Analog Inputs

card of the RTU. We are offered two different type transducers which are suggested

by POWERGRID.

2. Communication:

The Communication between the RTUs to be installed in control room will over modbus TCP/IP.

In case of failure of the above communication links, a local hooter will be activated so that

immediate action could be taken to restore the same.

The installed SCADA Server will communicate with RTU over modbus TCP/IP.

3. Bill of Material:

BILL OF MATERIAL (BOM) FOR SPS Project at BHADLA

S.No. Item Description Make & Model Units 765/400 KV PG, BHADLA

1

Fully wired standalone panel as per requirement at site for PLC with required accessories and 48 volt power supply and associated field cabling and with the following electronics:

No. 1

a 19" RTU Rack SSS, E70-RCK-001 No. 1

b RTU E70 16 I/O-slot backplane for 19”-subrack SSS, E70-CHS-001 No. 1

c RTU E70 Rack Power Supply Unit SSS, E70-PSU-001 No. 1

d RTU E70 CPU, 2 LAN, 6 Serial ports SSS, E70-CPU-001 No. 1

e RTU E70 Digital Input Module, Pos Logic, 32ch (4 Groups of 8), 48VDC

SSS, E70-DIA-002 No. 1

f RTU E70 Analog Input Module, 12 ch, Voltage/Current input

SSS, E70-AIB-003 No. 1

g RTU E70 Digital Output Module, 16 ch (2 groups of 8) , relay output

SSS, E70-DOB-001 No. 1

h Heavy Duty Relay (with 1 NO contact and contact rating 220 VDC , 10 amp.) in RTU

Paramount No. 20

2 Transducer (Aux. Supply 220VDC) AEL/PYROTECH/ELSTER

b 4-20 mA, 3 Ph MW Transducer with Single Output (Bi-directional Or Unidirectional)

No. 5

3 PLC Programming Software Husky Studio No. 1

4

SCADA Software with license and Server grade computer of minimum configuration as Intel Xeon CPU, 3.30 Ghz, 8 GB main memory,1TB Hard Disk, DVD-RW drive, 19 inch color TFT monitor, Key Board, Mouse, 10/100/1000 mbps Ethernet port, USB Port, 500VA UPS, with associated OFC/Ethernet cabling and connectivity hardware for communication with RTU/PLC, AC Power Extension Board

SIRIUS/ HP,IBM,DELL No. 1

10

SCADA user manual

Sets 3 PLC user manual

Wiring Diagram

4. Scope of Work:

1. Submission of Functional Design specifications for customer’s approval of the final

design and make/models of the equipment to be purchased.

2. Design, manufacturing and supply of SPS System.

3. Internal testing of SPS system

4. Conducting Factory inspection tests in presence of customer’s representatives.

5. Supply & laying of Power, Communication & signal cables:

a. Power cable up to RTU panel

b. Signal cables from RTU to different panels.

c. Communication cabling: LAN cable

6. Erection, testing and commissioning.

7. Installation of MW transducers in customer’s panels so that CT/PT connections need

not be extended outside existing customer panels.

8. Providing all the necessary Operating and maintenance manuals, as built drawings.

9. Training to the customer:

a. Two days training would be provided at PG, Bhadla.

The following works are not included in the scope :

1. Supply/laying of cable trays for cabling.

2. Digging of cable trenches. Existing cable trenches will be used.

3. Any major Civil/Mechanical/Electrical work required as part of SPS commissioning.

Note:

1. All the MW limits and time delay should be kept flexible with the facility to make

changes in these values at field level without change in hardware configuration.

2. It should be possible to arm / disarm any of the SPS action as and when required.

3. All the parameters should be configurable through SCADA PC with user friendly SCADA

software. Licensed SCADA software for configuration, monitoring and control of logic

system has to be provided by the supplier.

4. Logic system hardware failure alarms should be available in the audio/visual form.

Potential free contacts with respect to each failure should also be incorporated for

wiring of the same for remote monitoring purpose.

CABLE DETAILS

S.NO. Item Description Cable Spec. Units Approx. Length

1 DI and AI Signal Cable from Kiosk to Control Room (In RTU Panel)

5 core stranded copper (2.5mm2) armored

Meter 200

2 DI , AI and DO Signal Cable from Kiosk to Control Room (In RTU Panel)

10 core stranded copper (2.5mm2) Armored (shielded)

Meter 6000

3 DI and AI Signal Cable from termination junction box to Control Room (In RTU Panel)

27 core stranded copper (2.5mm2) Armored (shielded)

Meter 500

5. Self diagnostic test facility for checking healthiness of the logic system (hardware and

software) should be available in the logic system being supplied.

6. Permissible time delay to be maintained in the scheme is total permissible delay i.e.

from the initiation of command by logic system to the time taken to reach command at

far end tripping relay at respective loads/sites.

7. RTU/PLC supplied should be expendable by 100 % of supplied capacity for AI, DI, DO and

communication port to meet any future requirement.

8. Supply, laying and termination of appropriate cable for all input and output point to and

from logic system shall be responsibility of supplier.

9. Control cables are to be laid through existing trenches.

Annexure-A.I

Follow up issues from previous OCC meetings

Sl.

No. Agenda point Details Status / Decision

1. Sub-stations likely to

be commissioned in

next six months.

All the concerned states were requested to submit the details of the downstream network associated specially with POWERGRID substations along with the action plan of their proposed / approved networks.

Present members confirmed the status details of downstream networks mentioned in Annexure-A.I.I.

2. Progress of installing

new capacitors and

repair of defective

capacitors

Information regarding installation of new capacitors and repair of defective capacitors is to be submitted to NRPC Secretariat.

Information received Rajasthan, Uttarakhand up to June 2020.

Haryana up to February 2020

Delhi, HP and Chandigarh (up to Sep’2019).

All states were requested to furnish updated status monthly.

3. Healthiness of

defence mechanism:

Self- certification

Report of mock exercise for healthiness of UFRs carried out by utilities themselves on quarterly basis is to be submitted to NRPC Secretariat and NRLDC. All utilities were advised to certify specifically, in the report that “All the UFRs are checked and found functional”.

Report for the period ending Jun’2020 received from HP

Ending March’2020 received from UP.

BBMB have submitted information up to Nov’2019.

Haryana, Punjab have submitted information up to Dec’2019.

All states are again requested to submit details of feeder-wise expected load relief through UFR and df/dt relays in the format enclosed at Annexure-A.2.3 of agenda of 165th OCC.

4. Status of FGD installation vis-à-vis installation plan at identified TPS

List of FGDs to be installed in NR was finalized in the 36th TCC (special) meeting dt. 14.09.2017. All SLDCs were regularly requested since 144th OCC meeting to take up with the concerned generators where FGD was required to be installed. Further, progress of FGD installation work on monthly basis is monitored in OCC

Updated status ending March 2020 has been received from UPRVUNL.

Ending February 2020 has been received from Rajasthan and Punjab.

All states/utilities are requested to update status on monthly basis.

Sl.

No. Agenda point Details Status / Decision

meetings.

5. Reactive compensation at 220 kV/ 400 kV level

Sl. No.

Owner Substation Reactor Updated Status

1. POWERGRID Kurukshetra 500 MVAr TCR Anticipated commissioning: Jan-

Mar’2021

2 DTL

Peeragarhi 1x50 MVAr at 220 kV Tender opened on 27.02.2020.Under Bid evaluation. Harsh Vihar 2x50 MVAr at 220 kV

Mundka 1x125 MVAr at 400 kV

No bid received for the Tender scheduled to be opened on 04.03.2020. To be refloated.

1x25 MVAr at 220 kV

Bamnauli 2x25 MVAr at 220 kV

Indraprastha 2x25 MVAr at 220 kV

Electric Lane 1x50 MVAr at 220 kV Scheme sent for approval in DTL BOD meeting.Tender to be floated after approval.

3.

Punjab

Dhuri 1x125 MVAr at 400 kV Bid opening date extended due to less participation. TO be opened on 26.03.2020.

1x25 MVAr at 220 kV

Nakodar 1x25 MVAr at 220 kV

4. PTCUL Kashipur 1x125 MVAR at 400 kV Already submitted to PSDF. On

hold due to policy decision

5.

Rajasthan

Akal 1x25 MVAr PSDF funding sanctioned. Under tendering

Bikaner 1x25 MVAr

Suratgarh 1x25 MVAr

Barmer 1x25 MVAr Response awaited from TESG of PSDF. Jodhpur 1x125 MVAr

Annexure-AI.I

Sl.

No. Substation

Downstream network

bays

Commissioning

status of S/s /

Transformer

Planned 220 kV

system and

Implementation

Status

1 400/220kV,

3x315 MVA

Samba

2 nos. bays utilized

under ISTS. Balance 4

nos. to be utilized

Commissioned

(1st & 2nd –

Mar’13

3rd – Oct’16)

Bays - Mar’13

LILO of 220 kV

Bishnha –Hiranagar

D/c line.

Target completion -

Nov, 2019

220 kV D/c Samba

(PG) – Samba

(JKPDD) approved in

1st NRSCT.

No representation

from JKPDD

2 400/220kV,

2x315 MVA

New Wanpoh

6 Nos. of 220 kV bays to

be utilized

Commissioned

in Jul’14

Bays-Jul’14

220 kV New Wanpoh

-Mirbazar D/c line.

220 kV Alusteng -

New Wanpoh Line.

No representation

from JKPDD

3 400/220kV,

2x500 MVA

Kurukshetra

(GIS)

4 nos. of 220 kV bays to

be utilized

4 nos. of bays utilised for

LILO of one circuit of

Kaul-Pehowa 220 kV D/c

line at Bhadson

(Kurukshetra).

Commissioned on

07.03.2019

LILO of one circuit of

Kaul- Bastara 220 kV D/c

line

Bhadson(Kurukshetra).

Commissioned on

27.06.2019

Commissioned

in Mar’17. 220kV D/c Bhadson

(Kurukshetra) –

Salempur with HTLS

conductor equivalent

to twin moose.

P.O. issued on

15.10.18. Contract

agreement signed on

30.11.18. Likely date

of completion is

30.04.2020.

4 400/220 kV,

2x315 MVA

Dehradun

Out of 6 bays, only two

bays used. Balance 4

bays to be utilised.

Commissioned

in Jan’17

220 kV Dehradun-

Jhajra line.

Target completion: Nov

2021

Annexure-AI.I

Sl.

No. Substation

Downstream network

bays

Commissioning

status of S/s /

Transformer

Planned 220 kV

system and

Implementation

Status

5 Shahjahanpu,

2x315 MVA

400/220 kV

Partially utilized. Balance

4 Nos. of 220 kV bays to

be utilized.

Commissioned

in Jun/Sep’14

Shajahnapur-Azimpur

D/C line is planned,

expected by Dec,

2020

220 kV D/C

Shajahnapur-Gola

line expected by Dec,

2020

6 Hamirpur

400/220 kV 2x

315 MVA Sub-

station

(Augmentatio

n by 3x105

MVA ICT)

2 nos. bays utilized

under ISTS. Balance 6

nos to be utilized

1st-Dec’13, 2nd –

Mar’14 & 3rd

Mar’19.

4 bays-Dec’13,

2 bays-Mar’14

2 bays-Mar’19

220 kV D/C

Hamirpur-Dehan line.

Target completion –

Dec, 2020

7 Kaithal

400/220 kV 1x

315 MVA Sub-

station

July 2017 (Shifting of

transformer from

Ballabhgarh)

Commissioned 220 kV Kaithal(PG)-

Neemwala D/c line.

Target completion -

30.04.2020

8 Sikar

400/220kV,

1x 315 MVA

S/s

2 Nos. of 220 kV bays Commissioned Retendering to be

done in Feb/Mar

2020.

9 Bhiwani

400/220kV

S/s

6 nos. of 220kV bays Commissioned 220kV Bhiwani (PG) -

Isherwal (HVPNL) D/c

line.


Nov, 2020

10 Jind

400/220kV

S/s

6 nos. of 220kV bays Commissioned LILO of both circuits

of 220kV D/c

Narwana – Mund line

at Jind (PG).


Nov, 2020

Annexure-AI.I

Sl.

No. Substation

Downstream network

bays

Commissioning

status of S/s /

Transformer

Planned 220 kV

system and

Implementation

Status

11

400/220kV

Tughlakabad

GIS

(10 no of

220kV bays)

4x 500 Commissioned RK Puram –

Tughlakabad (UG

Cable) 220kv D/c line.

Scheme will be

revised


March 2023

Okhla – Tughlakabad

220kv D/c line.

Mehrauli –

Tughlakabad 220kv

D/c line.

BTPS – Tughlakabad

220kv D/c line.

Commissioned.

Masjid Mor –

Tughlakabad 220kv

D/c line.


Dec, 2021.

12 400/220kV

Kala Amb GIS

(TBCB)

(6 nos. of

220kV bays)

7x105 Commissioned

(Jul’17)

HPPTCL has planned

one no. of 220kV D/c

line from Kala Amb

400/220kV S/s to

220/132kV Kala Amb

S/s. Details for

remaining 4 nos. of

line bays may be

provided.


Dec, 2021

NRLDC input for SPS logic to be implemented by HP (Himachal Pradesh) for evacuation of small hydro generation from 220 kV Lahal-Budhil-Chamera3-Chamba section In the complex of Chamera-III HEP, Budhil HEP and Chamba pooling station, existing generation and transformation capacity is as below: 1. Chamera-3 HEP: 3 units of 77 MW, total 254 MW including 10% overload 2. Budhil HEP: 2 units of 35 MW, total 77 MW including 10% overload 3. Karian SHEP: 34 MW capacity (directly connected at Chamba) 4. Chamba station: 2*315 MVA 400/220 kV ICTs Additional Generation to be allowed: 5. SHEP at Lahal: 26 MW capacity (Allowed on opportunity basis) SPS logic submitted by HP (Himachal Pradesh) is as below:

In this logic condition 1 “transformer loading more than 65%” is not required. Only second logic of tripping of feeders in case of ICTs loading more than 90% of its capacity on any of the transformers will suffice for taking care of transformers loading. Apart from above, logic of line loading of 220 kV Chamba (Chamera Pool)-Chamera 3 ckt-1 (healthy ckt on ERS tower) more than 360MVA also to be added in this SPS scheme.

Annexure-B.I

Tripping of 220 kV Budhil-Lahal ckt at both end needs to be planned instead of 33 kV feeders as it may be resulted into some additional time delay in final tripping.

Final Logic can be devised like:

Condition A. Loading on 400/220 kV 315 MVA ICT1 more than 408A (90% of 454 A

full load current at 400 kV side of ICT-1) for 2 seconds

OR Logic

Condition B. Loading on 400/220 kV 315 MVA ICT2 more than 408A (90% of 454 A

full load current at 400 kV side of ICT-2) for 2 seconds

(Output of above two conditions- C)

Condition D. Loading on 220 kV Chamera3-Chamba ckt-1 more than 360 MW for 1.5

seconds than output is E

On the basis of outcome C=1: Tripping of 220 kV Chamba-Karian ckt at Chamba (Chamera

pooling station) end (34 MW Generation will be tripped at Karian)

If C=1 Logical OR E=1 than output is F=1

On the basis of outcome F=1: Tripping of 220 kV Budhil-Lahal ckt from both ends (26 MW

Generation will be tripped at Lahal)

Logical OR Gate

Condition A

Condition B

Condition D

C=1 F=1

E=1

Tripping of 220 kV Budhil-Lahal ckt

from both end (Generation loss 26 MW

at Lahal)

Logical OR Gate

Tripping of 220 kV Chamba-Karian ckt at

Chamba (Chamera pooling station) end

(Generation loss 34 MW at Karian)

Other points for consideration:

SPS tripping shall be achieved within 100ms of SPS initiation.

As approved in earlier NRPC meeting, Any New SPS scheme is being

implemented than its signal shall be wired in station SoE (Sequence of Event

recorder) or SAS based event logger. Accordingly, SPS signal shall be wired

at Chamba (Chamera pooling station) station SoE, Budhil HEP station SoE

and Lahal station SoE. In case of actual operation these details shall be

shared with NRPC/ NRLDC

SPS will be reviewed after charging of 220 kV Chamera3-Chamba ckt-2 and

removal of ERS tower in 220 kV Chamera3-Chamba ckt-1. In that case, only

condition D (line loading) could be removed but SPS for Chamba ICTs need

to continue till installation of 3rd ICT at Chamba station.

Any modification in SPS scheme shall be approved in OCC/NRPC meeting.

Power evacuation shall only be allowed after successful implementation of

SPS scheme along with mock trial operation.

Annexure-B.II

PRELIMINARY REPORT FOR

LOAD CRASHED DURING

INCLEMENT WEATHER ON

04.07.2020 & 05.07.20

1. Time & Date of Event: Load crashed during Night shift on 04.07.20 w.e.f

20:00hrs to 08:00hrs(05.07.20)

2. State Name: Punjab, Haryana, Delhi, Uttarakhand & UP.

3. Antecedent Condition:

NR Demand: 41915 MW at 03:45 Hrs.

Frequency: 50.393 Hz due to Heavy Under drawl around 6400MW (Punjab-2500, Haryana-2000MW, Delhi-1050 &

UP-750MW)

4. Generation Loss/ Load Loss: NR demand got reduced by ~ 23,500MW from 61,388 MW

at 20:2 7 Hrs o n 0 4 . 0 7 . 2 0 to 37850.37 MW at 06:03Hrs on 05.07.2020.

Maximum Load crash of around 20,000 MW observed compared previous day at 06:03Hrs on 05.07

2020. At 03:45hrs frequency touched 50.393Hz on account of NR under drawl of about 6400MW by the above stated

constituents.

5. Primary cause of Load Crashed (Triggering incident): I t is observed that NR Load was reducing

due to stormy weather conditions with effect from 20:00hrs and continued the pattern throughout

the shift. This leads to maximum Load crashed around~20,000 MW at 06:03hrs compare to previous

day. Punjab, Haryana, UP and Delhi are the main contributor to the Load crashed. ( Plots attached)

6. Action Taken: 1. It is repeated communicated with Punjab, Haryana, UP and Delhi to reduce

internal Generation and also surrender their share in ISGS Plant of NR & other region to minimize

their respective under drawl and maintain schedule.

2. Punjab was reduced its own generation around 800MW by closing units of Roper(210*4) ,

Lehra(250*2) . similarly Haryana also reduced its generation around 1,800MW by closing units of

Panipat, Yamunanagar and Khedar & One unit Istpp Jhajjar (500MW).

3. Hydro Generation was also reschedule and reduced by 600 MW(Tehri) in order to minimize the

under drawl in NR Region .

4. Due to Extreme weather condition voltage in NR region Also was in Higher side of the band . To

control the over voltage condition , HVDC power flow was optimized and around 21 Lines opened

during night shift . (Frequency plot attached)

Regards,

B R Meena, Pankaj kumar Yadav, Lav Kumar, Vinay

Annexure-B.III

NR DEMAND:

FREQUENCY:

LOAD CRASH IN HARYANA, UP AND DELHI:

HARYANA:

PUNJAB:

DELHI:

Annex-B.IVa

S. No.

Utility

Apr-Jun 2020

Total No. of tripping

FIR (Not Received)

DR (Not Received)

EL (Not Received)

TR (Not Received)

1 SLDC-UP (Uttar Pradesh) 650 335 364 379 400

2 SLDC-RS (Rajasthan) 270 57 187 189 167

3 CPCC1 (PG-NR1) 268 17 19 19 22

4 CPCC3 (PG-NR3) 185 67 70 70 67

5 CPCC2 (PG-NR2) 157 128 132 136 156

6 SLDC-HR (Haryana) 87 83 74 79 83

7 SLDC-DV (Delhi) 84 79 75 78 78

8 SLDC-UK (Uttarakhand) 68 54 56 56 59

9 SLDC-PS (Punjab) 68 65 67 67 67

10 BBMB 55 3 14 18 3

11 SLDC-JK (J&K) 48 48 48 48 48

12 SINGRAULI-NTPC 19 19 19 19 19

13 SALAL-NHPC 17 0 0 0 0

14 STERLITE POWER 14 14 14 14 14

15 NAPP (NPCIL) 14 14 14 14 14

16 RAMPUR (SJVNL) 13 11 11 11 11

17 DADRI-NTPC 12 12 12 12 12

18 NJPC (SJVNL) 11 4 4 4 4

19 SAURYA URJA 11 11 11 11 11

20 RAPPB (NPCIL) 10 10 10 10 10

21 SLDC-HP (Himachal Pradesh) 10 10 10 10 10

22 UNCHAHAR-NTPC 9 9 8 8 9

23 RAPPA (NPCIL) 8 8 8 8 8

24 RIHAND-NTPC 8 4 5 5 5

25 AURAIYA-NTPC 7 7 7 7 7

26 JHAJJAR (APCPL) 6 0 0 0 0

27 KISHENGANGA-NHPC 6 0 0 0 5

28 TANAKPUR-NHPC 6 0 0 0 0

29 TANDA-NTPC 5 5 5 5 5

30 BAIRASUIL-NHPC 5 0 0 0 2

31 DHAULIGANGA-NHPC 4 0 0 0 0

32 KOLDAM-NTPC 4 1 1 1 1

33 RAPPC (NPCIL) 4 4 4 4 4

34 SEWA-2-NHPC 4 0 0 0 0

35 KOTESHWAR-THDC 3 3 3 3 3

36 PARBATI-III-NHPC 3 0 0 0 0

37 ANTA-NTPC 3 3 3 3 3

38 SHREE CEMENT 2 2 2 2 2

39 APL (Adani) 2 1 1 1 1

40 TEHRI-THDC 2 2 2 2 2

41 URI-II-NHPC 1 0 0 0 0

42 CHAMERA-III-NHPC 1 0 0 0 0

43 KARCHAM 1 1 1 1 1

44 CHAMERA-I-NHPC 1 0 0 0 0

FIR- First Information Report or Preliminary Report; DR- Disturbance Recorder; EL- Event Logger; TR- Tripping Report (Detailed tripping report)

Month wise status is tabulated below: (Status as on -1 July 2020)

TotalFIR (Not

Received)

DR (Not

Received)

EL (Not

Received)

TR (Not

Received)Total

FIR (Not

Received)

DR (Not

Received)

EL (Not

Received)

TR (Not

Received)Total

FIR (Not

Received)

DR (Not

Received)

EL (Not

Received)

TR (Not

Received)

1 SLDC-RS (Rajasthan) 49 5 36 36 28 120 28 77 78 70 101 24 74 75 69

2 CPCC3 (PG-NR3) 46 15 17 17 15 122 40 40 40 39 17 12 13 13 13

3DHAULIGANGA-

NHPC3 0 0 0 0 1 0 0 0 0 0 0 0 0 0

4 KOLDAM-NTPC 1 1 1 1 1 1 0 0 0 0 2 0 0 0 0

5 KOTESHWAR-THDC 1 1 1 1 1 2 2 2 2 2 0 0 0 0 0

6 CPCC1 (PG-NR1) 46 5 6 6 6 130 1 2 2 4 92 11 11 11 12

7 JHAJJAR (APCPL) 2 0 0 0 0 4 0 0 0 0 0 0 0 0 0

8 RAPPB (NPCIL) 1 1 1 1 1 4 4 4 4 4 5 5 5 5 5

9SLDC-HP (Himachal

Pradesh)3 3 3 3 3 4 4 4 4 4 3 3 3 3 3

10 URI-II-NHPC 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0

11 SLDC-HR (Haryana) 10 10 10 10 10 47 43 35 39 43 30 30 29 30 30

12 NJPC (SJVNL) 5 1 1 1 1 3 3 3 3 3 3 0 0 0 0

13 SLDC-JK (J&K) 14 14 14 14 14 16 16 16 16 16 18 18 18 18 18

14SLDC-UK

(Uttrakhand)15 15 15 15 15 33 22 24 24 25 20 17 17 17 19

15SLDC-UP (Uttar

Pradesh)185 137 145 154 156 333 144 159 164 185 132 54 60 61 59

16 RAMPUR (SJVNL) 5 5 5 5 5 5 3 3 3 3 3 3 3 3 3

17 KISHENGANGA-NHPC 5 0 0 0 5 1 0 0 0 0 0 0 0 0 0

18 TANAKPUR-NHPC 3 0 0 0 0 2 0 0 0 0 1 0 0 0 0

19 SINGRAULI-NTPC 7 7 7 7 7 10 10 10 10 10 2 2 2 2 2

20 TANDA-NTPC 3 3 3 3 3 1 1 1 1 1 1 1 1 1 1

21 SALAL-NHPC 12 0 0 0 0 5 0 0 0 0 0 0 0 0 0

22 SLDC-DV (Delhi) 23 23 23 23 23 34 34 32 34 34 27 22 20 21 21

23 RAPPA (NPCIL) 4 4 4 4 4 4 4 4 4 4 0 0 0 0 0

24 SHREE CEMENT 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0

25 DADRI-NTPC 1 1 1 1 1 5 5 5 5 5 6 6 6 6 6

26 UNCHAHAR-NTPC 2 2 2 2 2 5 5 4 4 5 2 2 2 2 2

27 CPCC2 (PG-NR2) 33 33 32 33 32 77 60 65 68 77 47 35 35 35 47

28 STERLITE POWER 3 3 3 3 3 5 5 5 5 5 6 6 6 6 6

29 BAIRASUIL-NHPC 2 0 0 0 2 3 0 0 0 0 0 0 0 0 0

30 NAPP (NPCIL) 5 5 5 5 5 6 6 6 6 6 3 3 3 3 3

31 PARBATI-III-NHPC 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0

32 BBMB 17 0 6 8 0 24 0 3 3 0 14 3 5 7 3

33 RIHAND-NTPC 1 1 1 1 1 6 3 3 3 3 1 0 1 1 1

34 SLDC-PS (Punjab) 16 14 16 16 16 36 35 35 35 35 16 16 16 16 16

35 APL (Adani) 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1

36 RAPPC (NPCIL) 0 0 0 0 0 2 2 2 2 2 2 2 2 2 2

37 CHAMERA-III-NHPC 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0

38 SEWA-2-NHPC 0 0 0 0 0 2 0 0 0 0 2 0 0 0 0

39 AURAIYA-NTPC 0 0 0 0 0 7 7 7 7 7 0 0 0 0 0

40 SAURYA URJA 0 0 0 0 0 2 2 2 2 2 9 9 9 9 9

41 ANTA-NTPC 0 0 0 0 0 1 1 1 1 1 2 2 2 2 2

42 KARCHAM 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1

43 TEHRI-THDC 0 0 0 0 0 0 0 0 0 0 2 2 2 2 2

44 CHAMERA-I-NHPC 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0

S. No. Utility

Apr-20 May-20 Jun-20

Procedure to fill FIR details by the Constituents in the New Tripping Portal of NRLDC

1. Logging in the Portal:

Annexure-B.IVb

Upon login, a page displaying list of elements tripped and corresponding

columns for First information report (FIR), Disturbance recorder (DR),

Station event logger (EL) and Final trip report (TR) will get displayed as

shown in figure-2. The tripping for the desired month and year can be

selected from the drop down menu given at the top and then by clicking on

‘Get tripping’ tab.

2. Filling Constituent FIR Form : ‘Fillable’ Constituent FIR form can be accessed by clicking on the cross mark “X” corresponding to the event as shown in figure-2 and following fillable form will get displayed (Figure-3)

A. Event Details:

• The fields namely ‘Element name, Document type, tripping Date &

Time’ will be prefilled as displayed in figure-3.

• Fill the restoration details by clicking on the red icon given at the right hand side and select the appropriate date & time of restoration. If element is not yet restored then this field may be left blank.

• Select the control area, type & name of the station and utility/agency involved as shown in the figure-4. If two control area/station/utility is involved, using the icon “+”, additional element can be added.

B. Antecedent Conditions:

Under antecedent conditions, information like, ‘’Line/ equipment under maintenance, weather condition and any other relevant information’’ prior to occurrence of the event are to be filled as shown in figure-5. If two or more lines/equipment are under maintenance, using the icon “+”, additional element can be added.

C. Details of tripping

In this section, fields like (a) type of fault, (b) equipment failure, (c) Auto-reclose operation details, (d) other elements that got tripped, (e) Brief analysis, (f) Load/ generation loss(if any), (g) energy unserved, (h) SPS/ dfdt operations during the event are to be filled against respective text box as shown in figure-6. The fields mentioned at Sl. no. (a), (b), (d), (e) and (f) above are mandatory and if these are not applicable to a particular tripping then “NA” to be entered in the text box. For fields like fault clearing time (mS), Load/ generation loss and energy unserved (MU) only integers are to be entered i.e. numeric value

D. Relay/PLCC/LA Operation details

In this section, fill the details like control panel Annunciation, main-I and II relay indications, PLCC counter increment, value of fault current, remarks if any as shown in figure.

For uploading files like SLD of the system, connectivity diagram, SCADA plots, SCADA SoE or any other files, select the number of files to be uploaded, then select the type of the file, browse the file from the system and upload as shown in figure-

After submitting the completed FIR, user will get the pop-up message as shown in figure

Completed FIR, viewed from the dashboard will appear as shown in this figure

Option has been given to export to pdf by clicking on the ‘’Export to pdf’’ tab.

3. Filling DR Form : ‘Fillable’ DR form can be accessed by clicking on the cross mark “X” corresponding to the event as shown in Figure-11 and following fillable form will get displayed

Upload the applicable/available files and click save. If no files are to be uploaded click not applicable checkbox.

Convert the main DR file into PDF and upload in the mandatory section.

4. Filling EL Form : ‘Fillable’ EL form can be accessed by clicking on the cross mark “X” corresponding to the event as shown in Figure-13 and following fillable form will get displayed

Upload the applicable/available files and click save. If no files are to be uploaded click not applicable checkbox then save.

5. Filling TR Form : ‘Fillable’ EL form can be accessed by clicking on the cross mark “X” corresponding to the event as shown in Figure and following fillable form will get displayed

Upload the applicable/available files and click save. If no files are to be uploaded click not applicable checkbox then save.

6. Filling Classification Form : ‘Fillable’ Classification form can be accessed by clicking on the classification tab.

Select the appropriate outage date to get the list of tripping. Select element to fill the classification details. Select the tripping category to define and Click save button.

Annexure-B.V

Date Timewithin 24hrs

after 24hrs

Not Received

within 24hrs

after 24hrs

Not Received

Received

Not Received

1 NR

1) 400 KV Alaknanda GVK(UPC)-Srinagar(UK) (UK) Ckt-12) 400 KV Alaknanda GVK(UPC)-Srinagar(UK) (UK) Ckt-23) 82.5 MW Alakhanda HEP - UNIT 24) 82.5 MW Alakhanda HEP - UNIT 3

PTCUL, UPPTCL 2-Jun-20 13:08

400 KV Alaknanda GVK(UPC)-Srinagar(UK) (UK) Ckt-1 & 2 tripped on R-Y fault. At the same time, 400kV Bus 1 along with Uni#2 & U nit#3 at Alaknanda also tripped. As per PMU, R-Y fault is observed in the system. In antecedent conditions, 400 KV Alaknanda GVK(UPC)-Srinagar(UK) (UK) Ckt-1 & 2 carrying 48MW & 46MW respectively. Unit#2 & Unit#3 generating 82MW each.

160 0 GD-1 0Y(PTCUL), Y(UP)

Y(PTCUL), Y(UP)

Y(UP) Y(PTCUL) 80ms

2 NR1) 400 KV Rajwest(RW)-Kankani (RS) Ckt-12) 400 KV Jodhpur-Kankani (RS) Ckt-2

RRVPNL 5-Jun-20 11:17

400 KV Rajwest(RW)-Kankani (RS) Ckt-1 tripped on R-N fault, 1.34 km from Kankani end. At the same time, 400 KV Jodhpur-Kankani (RS) Ckt-2 also tripped on R-N fault. As per PMU, R-N fault with delayed clearance is observed in the system. In antecedent conditions, 400 KV Rajwest(RW)-Kankani (RS) Ckt & 400 KV Jodhpur-Kankani (RS) Ckt-2 carrying 122MW & 40MW respectively.

0 0 GI-2 0 Y (RAJ) Y (RAJ) Y (RAJ) 360ms

3 NR

1) 220 KV Amargarh(NRSS XXIX)-Ziankote(JK) (PDD JK) Ckt-12) 220 KV Wagoora(PG)-Pampore(PDD) (PDD JK) Ckt-13) 220 KV Wagoora(PG)-Pampore(PDD) (PDD JK) Ckt-2

PDD JK, PG-NR2, NRSS29

6-Jun-20 19:02

Due to inclement weather at 1902Hrs, 220 KV Amargarh(NRSS XXIX)-Ziankote(JK) (PDD JK) Ckt-1 & 2 tripped on R-N fault. At 1944Hrs, 220 KV Wagoora(PG)-Pampore(PDD) (PDD JK) Ckt-1 & 2, 220kV Pampore-Mirbazar ckt-1 & 2 also tripped. As per PMU, R-Y fault at 1902Hrs & B-N fault at 1944Hrs is observed in the system. In antecedent conditions, 220 KV Amargarh(NRSS XXIX)-Ziankote(JK) (PDD JK) Ckt-1 & 2 carrying 97MW each. No load loss and generation loss is reported by J&K during tripping. However, J&K demand reduced by around 700MW from 1900Hrs to 1945Hrs due to bad weather.

0 0 GI-2 0

Y(PG-NR2),

Y(PDD-J&K),

Y(NRSS29)

Y(PG-NR2),

Y(PDD-J&K),

Y(NRSS29)

Y(PG-NR2),

Y(PDD-J&K),

Y(NRSS29)

80ms

4 NR1) 400/220 kV 500 MVA ICT 2 at Muradnagar_1(UP)2) 400/220 kV 315 MVA ICT 3 at Muradnagar_1(UP)

UPPTCL 7-Jun-20 10:50

400/220 kV 500 MVA ICT 2 at Muradnagar_1(UP) & 400/220 kV 315 MVA ICT 3 at Muradnagar_1(UP) tripped on earth fault. As per PMU, B-N fault with delayed clearance is observed in the system. In antecedent conditions, 400/220 kV 500 MVA ICT 2 at Muradnagar_1(UP) & 400/220 kV 315 MVA ICT 3 at Muradnagar_1(UP) carrying 73MW & 41MW respectively.

0 110 GD-1 0.28 Y(UP) Y(UP) Y(UP) 800ms

5 NR1) 220 KV Wagoora(PG)-Pampore(PDD) (PDD JK) Ckt-22) 220 KV Wagoora(PG)-Pampore(PDD) (PDD JK) Ckt-1

PG-NR2, PDD JK 8-Jun-20 18:14

220 KV Wagoora(PG)-Pampore(PDD) (PDD JK) Ckt-1 & 2 tripped on B-N fault. As per PMU, B-N fault with delayed clearance is observed in the system. 220 KV Wagoora(PG)-Pampore(PDD) (PDD JK) Ckt-1 & 2 carrying 46MW & 47MW respectively.

0 0 GI-2 0

Y(PG-NR2),

Y(PDD-J&K)

Y(PG-NR2),

Y(PDD-J&K)

Y(PG-NR2),

Y(PDD-J&K)

560ms

6 NR1) 400 KV Rajpura-Dhuri (PS) Ckt-22) 400 KV Rajpura-Dhuri (PS) Ckt-1

PSTCL ####### 12:52

400 KV Rajpura-Dhuri (PS) Ckt-1 tripped on B-N,Fault Current 5.34 KA, Fault Distance 54.6 Km from Rajpura end; tower collapse at location 158-162. At the same time, 400 KV Rajpura-Dhuri (PS) Ckt-2 tripped R-N,Fault Current 5.30 KA, Fault Distance 56.9 Km from Rajpura end; tower collapse at location 158-162. As per PMU, multiple faults are observed in the system. In antecedent conditions, 400 KV Rajpura-Dhuri (PS) Ckt-1 & 2 carrying 156MW each.

0 0 GI-2 0 Y(PSTCL) Y(PSTCL) Y(PSTCL) 80ms

7 NR1) 400 KV Ballabhgarh-Maharanibagh (PG) Ckt-12) 400 KV Dadri(NT)-Maharanibagh(PG) (PG) Ckt-1

PG-NR1 ####### 17:56

400 KV Dadri(NT)-Maharanibagh(PG) (PG) tripped on B-N fault, FLR-Dadri-17.1km/15.28kA. At the same time, 400 KV Ballabhgarh-Maharanibagh (PG) also tripped on B-N fault ,FLR-Balb-26.32km/10.04kA. As per PMU, multiple B-N faults are observed in the system. In antecedent conditions, 400 KV Dadri(NT)-Maharanibagh(PG) & 400 KV Ballabhgarh-Maharanibagh (PG) carrying 401MW & 149MW.

0 550 GD-1 0.55Y(PG-NR1)

Y(NTPC)Y(PG-NR1)

Y(NTPC)Y(PG-NR1)

80ms

S.No.

Region

Name of Elements(Tripped/Manually opened)

Owner/ Agency

Outage Energy Unserve

d (in MU)

Preliminary Report receipt status

DR/EL receipt statusDetailed Report

receipt status Fault Clearance

time (in ms)

Event(As reported)

Generation Loss (MW)

Load Loss

(MW)

Category as per CEA

Grid Standards

Annexure-B.V


after 24hrs

Not Received

within 24hrs

after 24hrs

Not Received

Received

Not Received

S.No.

Region


Owner/ Agency


d (in MU)




time (in ms)

Event(As reported)


Load Loss

(MW)

Category as per CEA

Grid Standards

8 NR1) 220 KV Bhadla(PG)-Saurya Urja(SU) (UNDEF) Ckt-12) 220 KV Bhadla(PG)-Saurya Urja(SU) (UNDEF) Ckt-2

PG-NR1/ Saurya Urja

####### 11:59

Event triggered when R-phase jumper connecting CT to wavetrap broken at Saurya urja (Rajasthan end). Fault in 220kV Bhadla(Ra) – 220kV Saurya Urja # 2 line. 220 KV Bhadla(PG)-Saurya Urja(SU) (UNDEF) Ckt-1 & 2 also tripped. As per PMU, Y-N fault is observed in the system. Generation loss of around 1130MW & 970MW observed in solar connected to Bhadla(PG) & Bhadla(Raj) respectively.

2100 0 GD-1 0Y(PG-NR1)

Y(Raj), Y(Saurya)

Y(PG-NR1)

Y(Raj), Y(Saurya)

Y(Raj), Y(Saurya

)80ms

9 NR

1) 800 KV HVDC Kurukshetra(PG) Pole-12) 800 KV HVDC Kurukshetra(PG) Pole-23) 800 KV HVDC Kurukshetra(PG) Pole-34) 800 KV HVDC Kurukshetra(PG) Pole-4

PG-NR2 ####### 12:20

Alll four poles of 800 KV HVDC Champa(PG)-Kurukshetra(PG) tripped due to DC line fault.As per PMU, fluctutations in voltage is observed in the system. In antecedent condtions, 800 KV HVDC Champa(PG)-Kurukshetra(PG) poles carrying 2000MW.

0 0 GI-2 0Y(PG-NR2)

Y(PG-NR2)

Y(PG-NR2)

NA

10 NR1) 400 KV Tehri(THDC)-Koteshwar(PG) (PG) Ckt-12) 765 KV Koteshwar-Meerut (PG) Ckt-13) 400 KV Tehri(THDC)-Koteshwar(PG) (PG) Ckt-2

PG-NR1 ####### 14:17

765kV Meerut-koteshwar line 1 tripped at 14:17 hrs due to operation of R phase reactor buchholz relay at Meerut substation. Due to tripping of this line and loss of evacuation path around 700 MW Generation loss occurred at Tehri Complex. As per PMU, No fault is observed in the system. In antecedent conditions, 765kV Meerut-koteshwar line 1 carrying 693MW. Generation at Tehri and koteshwar was around 510MW and 180MW respectively.

700 0 GD-1 0Y(PG-NR1)

Y(PG-NR1)

Y(PG-NR1)

NA

11 NR

1) 765 KV Bhadla-Bikaner (PG) Ckt-22) 220 KV Bhadla(PG)-Saurya Urja Solar(SU) (Saurya Urja) Ckt-13) 220 KV Bhadla(PG)-Saurya Urja Solar(SU) (Saurya Urja) Ckt-2

PG-NR1/ Saurya Urja

####### 14:51

765kV Bhadla-Bikaner 2 tripped at 14:51 hrs due to R-N fault. Fault current 3kA and fault distance 65 km from Bhadla. At the same time, 220kV Saurya urja - Bhadla(PG) ckt 1&2 tripped due to SOTF/TOR fault. Around 430 MW Solar Generation loss occurred at Saurya urja. As per PMU, R-N fault with unsuccessful autoreclosing is observed in the system.

430 0 GD-1 0Y(PG-NR1)

Y(Raj), Y(Saurya)

Y(PG-NR1)

Y(Raj), Y(Saurya)

Y(Raj), Y(Saurya

)80ms

12 NR1) 765 KV Agra Fatehbad(UP)-Lalitpur(LPG) (UP) Ckt-12) 660 MW Lalitpur TPS - UNIT 3, 660 MW Lalitpur TPS - UNIT 2

UPPTCL ####### 18:15

765kV Lalitpur-Fatehbad line 1 tripped at 18:15 hrs due to R-N fault, Fault current-1.996 KA,FD-271.2km from fatehabad end. Due to tripping of this line, Unit #2 and Unit #3 tripped at Lalitpur. Around 935 MW Generation loss occurred at Lalitpur. Unit#1 went on house load (around 65MW). As per PMU, R-N fault with unsuccessful autoreclosing is observed in the system. In antecedent conditions, Unit#1, Unit#2 & Unit#3 generating around 360MW, 355MW & 356MW respectively. 765kV Lalitpur-

935 0 GD-1 0 Y(UP) Y(UP) Y(UP) 80ms

13 NR

1) 765 KV Bhadla-Bikaner (PG) Ckt-22) 220 KV Bhadla(PG)-Saurya Urja Solar(SU) (Saurya Urja) Ckt-1 3) 220 KV Bhadla(PG)-Saurya Urja Solar(SU) (Saurya Urja) Ckt-2

PG-NR1/ Saurya Urja

####### 17:27

765kV Bhadla-Bikaner 2 tripped due to R-N fault, Fault dist.- 65.99Km and FC -3.434KA from Bhadla end. At the same time, 220kV Saurya urja - Bhadla(PG) ckt 1&2 also tripped from Saurya Urja end only. RE-generation loss is 170 MW approx. at Saurya-Urja. As per PMU, R-N fault with unsuccessful autoreclosing is observed in the system. In antecedent conditions, 765kV Bhadla-Bikaner 2 carrying 182MW and 220kV Saurya urja - Bhadla(PG) ckt 1&2 carrying 116MW & 66MW respectively.

170 0 GD-1 0Y(PG-NR1)

Y(Raj), Y(Saurya)

Y(PG-NR1)

Y(Raj), Y(Saurya)

Y(Raj), Y(Saurya

)80ms

Annexure-B.V


after 24hrs

Not Received

within 24hrs

after 24hrs

Not Received

Received

Not Received

S.No.

Region


Owner/ Agency


d (in MU)




time (in ms)

Event(As reported)


Load Loss

(MW)

Category as per CEA

Grid Standards

14 NR

1) 220 KV Bhadla(PG)-Saurya Urja Solar(SU) (Saurya Urja) Ckt-12) 220 KV Bhadla(PG)-Saurya Urja Solar(SU) (Saurya Urja) Ckt-2

PG-NR1/ Saurya Urja

####### 10:39

765kV Bhadla-Bikaner ckt 2 auto-reclose successful at 10:39 hrs on R-N fault, Fault dist.- 63.14Km and FC -5.78KA from Bikaner end. Further 220kV Saurya urja - Bhadla(PG) ckt 1&2 tripped at 10:39 hrs from Saurya Urja end only due to this transient fault. RE-generation loss is 450 MW is reported by Saurya-Urja(Bhadla). Both 220 kV lines are restored at 11:22 hrs. 765kV Bhadla-Bikaner CKT- 2 finally tripped at 10:59 hrs on R-N fault ,Fault Dist. – 68.46km & FC – 5.8KA from Bikaner end. As per PMU, at 1039Hrs

450 0 GD-1 0Y(PG-NR1)

Y(Saurya Urja)

Y(Saurya Urja)

Y(Saurya Urja)

80ms

15 NR

1) 220 KV Meerut(PG)-Gajraula(UP) (UP)2) 400/220 kV 500 MVA ICT 4 at Meerut(PG)3) 400/220 kV 315 MVA ICT 2 at Meerut(PG)4) 220 KV Meerut(PG)-Shatabdinagar(UP) (PG) Ckt-15) 220KV Bus 2 at Meerut(PG)6) 220 KV Meerut(PG)-Simbholi(UP) (PG) Ckt-1

PG-NR1, UPPTCL ####### 10:45

220 KV bus-II tripped along with ICT-2 & ICT-4 at Meerut substation due to operation of LBB relay on account of fault at 220 kV Meerut Gajraula line of UPPTCL. As per PMU, R-B fault is observed in the system. In antecedent conditions, 400/220 kV 315 MVA ICT 2 at Meerut(PG) & 400/220 kV 500 MVA ICT 4 at Meerut(PG) carrying 190MW & 280MW respectively.

0 0 GI-2 0Y(PG-NR1)

Y(UP)Y(PG-NR1)

Y(UP)Y(PG-NR1)

80ms

16 NR

1) 800 KV HVDC Kurukshetra(PG) Pole-12) 800 KV HVDC Kurukshetra(PG) Pole-23) 800 KV HVDC Kurukshetra(PG) Pole-34) 800 KV HVDC Kurukshetra(PG) Pole-4

PG-NR2 ####### 22:01

800kV HVDC Champa-Kurukshetra Pole 3 tripped due to CNAP maloperation at Champa end at 22:01 hrs, 800kV HVDC Champa-Kurukshetra Pole 1 tripped due to Isolation failed for parallel Pole-3 at 22:03 hrs, 800kV HVDC Champa-Kurukshetra Pole 2 tripped due to VBE major failure fault at Kurukshetra end at 22:03 hrs, 800kV HVDC Champa-Kurukshetra Pole 4 tripped due to Lane changeover failed at champa at 22:03 hrs. As per PMU, fluctuations in voltage is observed in the system.

0 0 GI-2 0Y(PG-NR2)

Y(PG-NR2)

Y(PG-NR2)

NA

17 NR1) 220 KV Akal-Amarsagar2) Wind Generation in Rajasthan control area (800MW)

RRVPNL ####### 11:05

Wind generation loss of 800 MW approx. of Rajasthan occurs after tripping of 220 KV Akal-Amarsagar line on Y-N fault, bus-coupler at Amarsagar also tripped. Generation was revived by 11.15 hrs. As per PMU, fluctuations in phase voltages are observed.

800 0 GD-1 0 Y(Raj) Y(Raj) Y(Raj) 80ms

18 NR1) 400/220 kV 315 MVA ICT 2 at Suratgarh(RVUN)2) 400/220 kV 315 MVA ICT 1 at Suratgarh(RVUN)

RRVPNL ####### 12:07

400/220 kV 315 MVA ICT 1 & 315 MVA ICT 2 at Suratgarh(RVUN) tripped on overloading. As per PMU, fluctuations in phase voltages are observed in the system. Load loss of around 500 MW approx. in Rajasthan is observed as per SCADA data. The load of 220 KV Hanumangarh,Sri Ganga Nagar and Bhadra was met through other sources and load was revived by 13.16 hrs.315 MVA ICT-1 & 2 were charged at 14.03 and 14.01 hrs. respectively.

0 500 GD-1 0.55 Y(Raj) Y(Raj) Y(Raj) NA

19 NR

1) 250 MW Nathpa-Jhakri HPS - UNIT 22) 68.67 MW Rampur HEP - UNIT 13) 250 MW Nathpa-Jhakri HPS - UNIT 34) 68.67 MW Rampur HEP - UNIT 45) 68.67 MW Rampur HEP - UNIT 36) 250 MW Nathpa-Jhakri HPS - UNIT 1

SJVNL ####### 01:31

Nathpa Jhakri Unit #1,2,3 (250 MW Each) & Rampur HEP Unit#1,3,4 (68.67 MW Each) tripped at 01:32 hrs due to 48V DC failure at Nathpa . Rampur units tripped on TOS (in Tandem with NJPS). As per PMU, No fault is observed in the system. In antecedent conditions, Nathpa Jhakri Unit #1,2,3 generating 269MW, 244MW & 272MW respectively. Rampur HEP Unit#1,3,4 generating 73MW, 74MW & 72MW respectively.

970 0 GD-1 0 Y(SJVNL) Y(SJVNL) Y(SJVNL) NA

20 NR1) 400 KV Suratgarh(RVUN)-Ratangarh(RS) (RS) Ckt-12) 400 KV Suratgarh(RVUN)-Ratangarh(RS) (RS) Ckt-2

RRVPNL ####### 12:12

400 KV Suratgarh(RVUN)-Ratangarh(RS) (RS) Ckt-1 tripped on R-Y fault, FD =4.9KM, from Ratangarh end. At the same time, 400 KV Suratgarh(RVUN)-Ratangarh(RS) (RS) Ckt-2 tripped on B-N Fault, FD= 37.7KM from Ratangarh end. As per PMU, No fault is observed in the system. In antecedent conditions, 400 KV Suratgarh(RVUN)-Ratangarh(RS) (RS) Ckt-1 & 2 carrying 27MW each.

0 0 GI-2 0 Y(Raj) Y(Raj) Y(Raj) NA

Annexure-B.V


after 24hrs

Not Received

within 24hrs

after 24hrs

Not Received

Received

Not Received

S.No.

Region


Owner/ Agency


d (in MU)




time (in ms)

Event(As reported)


Load Loss

(MW)

Category as per CEA

Grid Standards

21 NR1) 400 KV Bhadla-Jodhpur (RS) Ckt-12) 400 KV Jodhpur-Kankani (RS) Ckt-2

RRVPNL ####### 16:18

400 KV Bhadla-Jodhpur (RS) Ckt-1 tripped on Y-N fault. At the same time, 400 KV Jodhpur-Kankani (RS) Ckt-2 also tripped on Y-N fault. As per PMU, Y-N fault is observed in the system. In antecedent conditions, 400 KV Bhadla-Jodhpur (RS) Ckt-1 & 400 KV Jodhpur-Kankani (RS) Ckt-2 carrying 224MW & 17MW respectively.

0 0 GI-2 0 Y(Raj) Y(Raj) Y(Raj) 80ms

22 NR1) 800 KV HVDC Kurukshetra(PG) Pole-12) 800 KV HVDC Kurukshetra(PG) Pole-2

PG-NR2 ####### 16:45

800 KV HVDC Champa(PG)-Kurukshetra(PG) Pole-1 & 2 tripped on CNAP(Common Neutral Area Protection) protection operated at Champa end. As per PMU, Fluctuations in voltage is observed in the system. In antecedent conditions, 800 KV HVDC Champa(PG)-Kurukshetra(PG) Pole-1 & 2 carrying 375MW each.

0 0 GI-2 0Y(PG-NR2)

Y(PG-NR2)

Y(PG-NR2)

NA

23 NR1) 400 KV Khedar(HPG)-Kirori(HV) (HV) Ckt-12) 400/220 kV 315 MVA ICT 2 at Kirori(HV)

HVPNL ####### 11:53

400 KV Khedar(HPG)-Kirori(HV) (HV) Ckt-1 tripped due to snapping R-Phase jumper. At the same time,400/220 kV 315 MVA ICT 2 at Kirori(HV) also tripped. As per PMU, multiple R-N faults are observed in the system. In antecedent conditions, 400 KV Khedar(HPG)-Kirori(HV) (HV) Ckt-1 & 400/220 kV 315 MVA ICT 2 at Kirori(HV) carrying 144MW & 190MW respectively.

0 0 GI-2 0 Y(HVPNL) Y(HVPNL)Y(HVPNL

)80ms

24 NR

1) 68.67 MW Rampur HEP - UNIT 12) 250 MW Nathpa-Jhakri HPS - UNIT 63) 68.67 MW Rampur HEP - UNIT 54) 68.67 MW Rampur HEP - UNIT 25) 250 MW Nathpa-Jhakri HPS - UNIT 46) 250 MW Nathpa-Jhakri HPS - UNIT 57) 250 MW Nathpa-Jhakri HPS - UNIT 18) 68.67 MW Rampur HEP - UNIT 49) 250 MW Nathpa-Jhakri HPS - UNIT 210) 250 MW Nathpa-Jhakri HPS - UNIT 3

SJVNL ####### 04:23On DC supply failure, multiple units at Jhakri and Rampur HEP tripped at different successive times.

1000 0 GD-1 0 Y(SJVNL) Y(SJVNL) Y(SJVNL) NA

25 NR

1) 220 KV Samaypur(BB)-Badshahpur(HV) (HVPNL) Ckt-12) 220 KV Ballabhgarh-Samaypur (BB) Ckt-33) 220 KV Faridabad(NT)-Samaypur(BB) (PG) Ckt-24) 220 KV Palwal(HV)-Samaypur(BB) (HVPNL) Ckt-25) 400/220 kV 500 MVA ICT 3 at Ballabhgarh(PG)6) 220 KV Ballabhgarh-Samaypur (BB) Ckt-1

BBMB, HVPNL, POWERGRID

####### 09:27Bus-1 Bus bar protection operated at Samaypur(BBMB) resulted in tripping of elements connected to bus-1.

0 150 GD-1 0.15 Y(PG) Y(BBMB)Y(PG)

Y(HVPNL)Y(PG) Y(BBMB)

Y(PG)Y(HVPNL)

Y(BBMB) 80ms

26 NR1) 400 KV Anta(RS)-Kawai SCTPS(APR) (RS) Ckt-22) 400 KV Anta(RS)-Kawai SCTPS(APR) (RS) Ckt-13) 660 MW Kawai TPS - UNIT 1

RRVPNL ####### 00:22Multiple faults occurred resulted in tripping of 400kV Anta-Kawai D/C and subsequent tripping of Unit#1 at Kawai TPS.

540 0 GD-1 0 Y(Raj) Y(Raj) Y(Raj) 80ms

27 NR

1) 400 KV Khedar(HPG)-Kirori(HV) (HV) Ckt-12) 400/220 kV 315 MVA ICT 2 at Kirori(HV)3) 400 KV Khedar(HPG)-Kirori(HV) (HV) Ckt-24) 400 KV Jind(PG)-Kirori(HV) (HVPNL) Ckt-25) 400 KV Jind(PG)-Kirori(HV) (HVPNL) Ckt-16) 400/220 kV 315 MVA ICT 3 at Kirori(HV)

HVPNL, PG-NR1 ####### 01:57Due to flash on 400kV tie bay isolator of Jind Kirori Ckt -2 at kirori end, R-N fault occurred. This resulted in tripping of all 400kV lines emanating from Kirori.

0 200 GD-1 0.4Y(PG-NR1)

Y(HVPNL)Y(PG-NR1)

Y(HVPNL)Y(HVPNL

)400ms

28 NR1) 800 KV HVDC Kurukshetra(PG) Pole-13) 800 KV HVDC Kurukshetra(PG) Pole-3

PG-NR2 ####### 04:12800 KV HVDC Kurukshetra(PG) Pole-1 & 3 tripped due to Neutral bus switch reclose at Champa end.

0 0 GI-2 0Y(PG-NR2)

Y(PG-NR2)

Y(PG-NR2)

NA

Annexure-B.V


after 24hrs

Not Received

within 24hrs

after 24hrs

Not Received

Received

Not Received

S.No.

Region


Owner/ Agency


d (in MU)




time (in ms)

Event(As reported)


Load Loss

(MW)

Category as per CEA

Grid Standards

29 NR

1) 220 KV Amargarh(NRSS XXIX)-Ziankote(JK) (PDD JK) Ckt-12) 220 KV Amargarh(NRSS XXIX)-Ziankote(JK) (PDD JK) Ckt-2

NRSS29, PDD JK ####### 06:09220 KV Amargarh(NRSS XXIX)-Ziankote(JK) (PDD JK) Ckt-1 tripped on R-N fault with fault current 478amp, fault dist-110.77 km from Ziankot end. ckt-2 also tripped along with above.

0 50 GD-1 0.1

Y(NRSS29),

Y(PDD-J&K)

Y(NRSS29),

Y(PDD-J&K)

Y(NRSS29)

80ms

Annexure-B.VI

S. NO. Element NameOutage

DateOutage

TimeReason/Remarks

09-Jun-20 05:13 Blocked on CLD HV cable operated.11-Jun-20 12:20 DC line fault.16-Jun-20 22:03 Pole-1 Blocked due to Isolation failed for parallel Pole-3.17-Jun-20 00:50 Pole blocked due to control maloperation at Kurukshetra end.24-Jun-20 16:45 CNAP(Common Neutral Area Protection) protection operated at Champa end.

25-Jun-20 23:16Pole tripped due to abnormal firing angle. After analysis of TFR and controls logs, it seems to be control mal-operation.

30-Jun-20 04:12 Tripped due to Neutral bus switch Reclose at Champa end.09-Jun-20 05:00 Pole blocked on CAT-B protection operated.10-Jun-20 22:21 Blocked on CNAP protection.11-Jun-20 12:20 Dc line failed.16-Jun-20 22:03 Pole blocked due to VBE major failure fault at Kurukshetra end.20-Jun-20 18:56 Blocked on CAT B protection operated at Champa end .24-Jun-20 16:45 CNAP(Common Neutral Area Protection) protection operated at Champa end.25-Jun-20 15:13 VBE major fault at Champa end.16-Jun-20 22:01 Pole blocked due to CNAP maloperation at Champa end.24-Jun-20 11:36 Lane changeover failure(due to controls maloperation) at Champa end.

25-Jun-20 23:16Pole tripped due to abnormal firing angle. After analysis of TFR and controls logs, it seems to be control mal-operation.

30-Jun-20 04:12 Tripped due to Neutral bus switch Reclose at Champa end.16-Jun-20 22:03 Pole blocked due to Lane changeover failed at champa.20-Jun-20 18:55 Blocked on valve hall fire alarm (VESDA) protection operated at Champa end.25-Jun-20 16:17 Cat B protection in pole-4 at Champa.

03-Jun-20 14:44 R-N fault, 142.42km from Akal end. As per PMU, R-N fault occured, no auto-reclosing observed.03-Jun-20 18:18 Y-N fault, 90.12km from Akal end. As per PMU, Y-N fault occured, no auto-reclosing observed.05-Jun-20 09:15 Y-N fault, 91.4km from Akal end. As per PMU, Y-N fault occured, no auto-reclosing observed.30-Jun-20 22:02 R-N fault. As per PMU, R-N fault occured, no auto-reclosing observed.08-Jun-20 03:59 R-N fault. As per PMU, R-B fault is observed.

11-Jun-20 03:44B-N fault, 53.09km from Aligarh(UP) end. As per PMU, B-N fault occured, no auto-reclosing observed.

11-Jun-20 15:30 Y-N fault. As per PMU, Y-N fault occured, no auto-reclosing observed.12-Jun-20 00:59 Phase to earth fault. As per PMU, B-N fault occured, no auto-reclosing observed.

03-Jun-20 15:09 R-N fault, 1.31km from kankani end. As per PMU, R-N fault occured, no auto-reclosing observed. 05-Jun-20 11:17 R-N fault, 1.34km from kankani end. As per PMU, multiple R-N faults are observed.

24-Jun-20 16:26 R-N fault, 72.37km from kankani end. As per PMU, R-N fault occured, no auto-reclosing observed.

30-Jun-20 22:37R-N fault. As per PMU, R-N fault and unsuccessful auto-reclosing with delayed clearance is observed.

13-Jun-20 14:51 R-N fault. As per PMU, R-N fault and unsuccessful auto-reclosing observed.14-Jun-20 17:27 R-N fault. As per PMU, R-N fault and unsuccessful auto-reclosing observed.

16-Jun-20 10:59R-N fault. As per PMU, R-N fault occured, successful autoreclsoing is observed, Tripped in reclaim time.

02-Jun-20 08:06 R-N fault. As per PMU, R-N fault occured, successful autoreclsoing is observed.11-Jun-20 09:45 DT received at Unnao. Details awaited. As per PMU, No fault observed.28-Jun-20 17:55 Y-N fault, 25km from Unnao(UP) end. As per PMU, multiple Y-N faults are observed.

06-Jun-20 04:00R-N fault, 29.94km from Aligarh(UP) end. As per PMU, B-N fault occured, no auto-reclosing observed.

17-Jun-20 13:31zone - 1, Phase- B And C , Fault current Ib - 405.8 A, Ic - 484.4 A at Aligarh. As per PMU, B-N fault occured, no auto-reclosing observed.

30-Jun-20 00:34 R-N fault. As per PMU, R-B fault is observed.05-Jun-20 11:17 R-N fault, 1.43km from Kankani end. As per PMU, multiple R-N faults are observed.

24-Jun-20 16:18Y-N fault. As per PMU, Y-N fault occurred and delayed clearance of 400ms with no auto-reclosing observed.

30-Jun-20 22:37R-N fault. As per PMU, R-N fault and unsuccessful auto-reclosing with delayed clearance is observed.

06-Jun-20 21:58No flag observed on both end. Line tripped from Panki end and still closed from Aligarh end. As per PMU, No fault observed.

11-Jun-20 12:47 NO FLAG. As per PMU, No fault observed.

26-Jun-20 14:33Y-B fault, 105.6km from Panki(UP) end. As per PMU, Y-N fault and unsuccessful auto-reclosing observed.

800 KV HVDC Kurukshetra(PG) Pole-03




12

1

2

3

4

5

6

7

8

9

10

11

400 KV Panki-Aligarh (UP) Ckt-1

400 KV Agra-Unnao (UP) Ckt-1

400 KV Akal-Kankani (RS) Ckt-2

400 KV Aligarh-Muradnagar_1 (UP) Ckt-1

400 KV Aligarh-Sikandrabad (UP) Ckt-1

400 KV Jodhpur-Kankani (RS) Ckt-2

400 KV Rajwest(RW)-Kankani (RS) Ckt-1

765 KV Bhadla-Bikaner (PG) Ckt-2

Northern Regional inter regional lines tripping for May-20 Annexure-B.VII

Date Time Date Time

1 400 KV Varanasi-Biharshariff (PG) Ckt-2 POWERGRID 5-Jun-20 20:14 Nil B-N fault. NA 6-Jun-20 00:48 NOYES(After

24Hrs)YES(After

24Hrs)

From PMU, B-N fault with unsuccessful auto-reclosing is observed in the system.

2 800kV HVDC Champa-Kurukshetra pole 2 POWERGRID 6-Jun-20 10:29 NilSF6 gas low alarm in Pole2 HV DC voltage divider at Champa end.

NA 6-Jun-20 13:03 NA NO NOFrom PMU, No AC system fault observed.

3 800kV HVDC Champa-Kurukshetra pole 2 POWERGRID 9-Jun-20 05:00 NilPole blocked on CAT-B protection operated.

GI-2 9-Jun-20 14:37 NA NO NOFrom PMU, No AC system fault observed.



5 800kV HVDC Champa-Kurukshetra pole 1 POWERGRID 9-Jun-20 05:13 NilBlocked on CLD HV cable operated.


6 800kV HVDC Champa-Kurukshetra pole 3 POWERGRID 9-Jun-20 05:13 NilBlocked on CLD HV cable operated.



NIL 9-Jun-20 13:07 NA NO NOFrom PMU, No AC system fault observed.

8 800kV HVDC Champa-Kurukshetra pole 2 POWERGRID 10-Jun-20 22:21 Nil Blocked on CNAP protection. NA 11-Jun-20 00:32 NA NO NOFrom PMU, No AC system fault observed.

9 800kV HVDC Champa-Kurukshetra pole 4 POWERGRID 10-Jun-20 22:21 NilBlocked on DC under current protection.


10 800kV HVDC Champa-Kurukshetra pole 1 POWERGRID 11-Jun-20 12:20 Nil DC line fault. GI-2 11-Jun-20 16:33 NA NO NOFrom PMU, No AC system fault observed.

Suggestive Remedial Measures

Remarks

Category as per CEA

Grid standards

Restoration # Fault Clearance

Time(>100 ms for 400 kV and 160 ms for

220 kV)

*FIR Furnished (YES/NO)

DR/EL provided in 24 hrs(YES/NO)

Other Protection Issues and Non

Compliance(inference from

PMU, utility details)

S. No. Name of Transmission Element Tripped Owner/ Utility

OutageLoad Loss/ Gen. Loss

Brief Reason(As reported)


Date Time Date Time


Remarks

Category as per CEA

Grid standards



220 kV)









11 800kV HVDC Champa-Kurukshetra pole 2 POWERGRID 11-Jun-20 12:20 Nil Dc line failed. GI-2 11-Jun-20 17:03 NA NO NOFrom PMU, No AC system fault observed.



14 765 KV Chittorgarh-Banaskantha (PG) Ckt-1 POWERGRID 16-Jun-20 16:09 Nil R-Y fault. NA 16-Jun-20 18:59 NO YES YESFrom PMU, R-Y fault is observed in the system.

15 800kV HVDC Champa-Kurukshetra pole 3 POWERGRID 16-Jun-20 22:01 NilPole blocked due to CNAP maloperation at Champa end.


16 800kV HVDC Champa-Kurukshetra pole 1 POWERGRID 16-Jun-20 22:03 NilPole-1 Blocked due to Isolation failed for parallel Pole-3.


17 800kV HVDC Champa-Kurukshetra pole 2 POWERGRID 16-Jun-20 22:03 NilPole blocked due to VBE major failure fault at Kurukshetra end.


18 800kV HVDC Champa-Kurukshetra pole 4 POWERGRID 16-Jun-20 22:03 NilPole blocked due to Lane changeover failed at champa.


19 800kV HVDC Champa-Kurukshetra pole 1 POWERGRID 17-Jun-20 00:50 NilPole blocked due to control maloperation at Kurukshetra end.


20 800kV HVDC Champa-Kurukshetra pole 4 POWERGRID 20-Jun-20 18:55 NilBlocked on valve hall fire alarm (VESDA) protection operated at Champa end.



Date Time Date Time


Remarks

Category as per CEA

Grid standards



220 kV)









21 800kV HVDC Champa-Kurukshetra pole 2 POWERGRID 20-Jun-20 18:56 NilBlocked on CAT B protection operated at Champa end .


22 800kV HVDC Champa-Kurukshetra pole 3 POWERGRID 24-Jun-20 11:36 NilLane changeover failure(due to controls maloperation) at Champa end.

NA 24-Jun-20 14:16 NAYES(After

24Hrs)NO

Information received from NR end. From PMU, No AC system fault observed.

23 800kV HVDC Champa-Kurukshetra pole 1 POWERGRID 24-Jun-20 16:45 NilCNAP(Common Neutral Area Protection) protection operated at Champa end.


24 800kV HVDC Champa-Kurukshetra pole 2 POWERGRID 24-Jun-20 16:45 NilCNAP(Common Neutral Area Protection) protection operated at Champa end.


25 800kV HVDC Champa-Kurukshetra pole 2 POWERGRID 25-Jun-20 15:13 Nil VBE major fault at Champa end. NA 25-Jun-20 15:45 NA NO NOFrom PMU, No AC system fault observed.

26 800kV HVDC Champa-Kurukshetra pole 4 POWERGRID 25-Jun-20 16:17 NilCat B protection in pole-4 at Champa.


27 800kV HVDC Champa-Kurukshetra pole 3 POWERGRID 25-Jun-20 23:16 Nil

Pole tripped due to abnormal firing angle. After analysis of TFR and controls logs, it seems to be control mal-operation.


28 800kV HVDC Champa-Kurukshetra pole 1 POWERGRID 25-Jun-20 23:16 Nil

Pole tripped due to abnormal firing angle. After analysis of TFR and controls logs, it seems to be control mal-operation.


29 800kV HVDC Champa-Kurukshetra pole 1 POWERGRID 30-Jun-20 04:12 NilTripped due to Neutral bus switch Reclose at Champa end.

GI-2 30-Jun-20 07:18 NAYES(After

24Hrs)YES(After

24Hrs)


30 800kV HVDC Champa-Kurukshetra pole 3 POWERGRID 30-Jun-20 04:12 NilTripped due to Neutral bus switch Reclose at Champa end.

GI-2 30-Jun-20 05:45 NAYES(After

24Hrs)YES(After

24Hrs)



Date Time Date Time


Remarks

Category as per CEA

Grid standards



220 kV)









1Fault Clearance time(>100ms for 400kV and >160ms for 220kV)

2 DR/EL Not provided in 24hrs3 FIR Not Furnished4 Protection System Mal/Non Operation5 A/R non operation 1. CEA Technical Standard of Electrical Plants and Electric Lines: 43.4.C 2. CEA Technical Planning Criteria

# Fault Clearance time has been computed using PMU Data from nearest node available and/or DR provided by respective utilities ( Annexure- II)*Yes, if written Preliminary report furnished by constituent(s)R-Y-B phase sequencing (Red, Yellow, Blue) is used in the list content.All information is as per Northern Region unless specified.^^ tripping seems to be in order as per PMU data, reported information. However, further details may be awaited.

1. IEGC 5.2(r) 2. CEA Grid Standard 15.31. IEGC 5.9.6.a 2. CEA Grid Standard 12.2 (Applicable for SLDC, ALDC only)1. CEA Technical Standard of Electrical Plants and Electric Lines: 43.4.A 2. CEA (Technical Standards for connectivity to the Grid) Regulation, 2007: Schedule Part 1. (6.1, 6.2, 6.3)

Reporting of Violation of Regulation for various issues for above tripping

1. CEA Grid Standard-3.e 2. CEA Transmission Planning Criteria

Annexure-B.VIII

POSOCO Communication_Ensuring Reliability of transmission network 1

Annexure-B.IX

Copy to :


10021

Rectangle

S.No. Region Date Number of lines tripped

1 NR 03‐May‐20 4

2 NR 10‐May‐20 6

3 NR 10‐Jun‐20 3

4 NR 20‐Jun‐20 4

5 WR 27‐Apr‐20 5

6 WR 30‐Apr‐20 3

7 WR 03‐May‐20 3

8 WR 04‐May‐20 6

9 WR 09‐May‐20 4

10 WR 28‐May‐20 24

11 WR 29‐May‐20 5

12 WR 31‐May‐20 8

13 WR 03‐Jun‐20 5

14 WR 04‐Jun‐20 5

15 WR 05‐Jun‐20 3

16 WR 07‐Jun‐20 6

17 WR 14‐Jun‐20 3

18 WR 15‐Jun‐20 3

19 ER 19‐Apr‐20 3

20 ER 05‐May‐20 6

21 ER 20‐May‐20 10

22 ER 26‐May‐20 7

23 ER 30‐May‐20 3

24 ER 14‐Jun‐20 3

25 SR 07‐Apr‐20 5

26 SR 09‐Apr‐20 8

27 NER 09‐Apr‐20 4

28 NER 15‐Apr‐20 6

29 NER 17‐Apr‐20 6

30 NER 13‐May‐20 7

Total 168

Trippings per

day in one

region

6

Regionwise Summary of Lines(132 kV and above for NER and 400 kV

and above for other regions) tripped in bad weather days( when

more than two lines tripped) during Apr‐Jun 2020

Annexe_1


Date Time Date Time

1 765 KV Bara-Mainpuri (UP) Ckt-2Forced Tripped

UPPTCL,UPPTCL

25-04-2020 16:58 25-04-2020 22:07

At Bara end 710 52- B phase Breaker damaged due to heavy lightning & thunderstorm. Bus-bar protection operated at Bara. All three units also tripped at Bara. Generation loss of 1000 MW (approx.).

2400 KV Gurgaon(PG)-Sohna Road (Sterlite) (GPTL) Ckt-1

Forced Tripped

POWERGRID

26-04-2020 12:43 26-04-2020 16:13Phase to earth fault B-N Tripped on B-N fault during heavy storm and rain. FLR:GGN-2.33km/19.05kA,Sohna-5.07km/2.99kA.

3 400 KV Bhiwadi-Hissar (PG) Ckt-1Forced Tripped

POWERGRID

03-05-2020 17:47 03-05-2020 20:32

Phase to phase fault R-Y line ripped on both end due to R-Y fault fault current IR-28.8KA,IY28.78KA, fault dist 1. 8 meter from Hissar end and from bhiwadi end fault current, IR=IY=1.2KA, during severe storm and rain.

4 765 KV Moga-Bhiwani (PG) Ckt-1Forced Tripped

POWERGRID

03-05-2020 18:01 04-05-2020 13:23

Line tripped due to B-N fault,fault current-6.8KA, Fault dist-34.16km from Moga end due to bad weather. Damage in Earthwire clamps. Charging attempt failed 21:30 hrs due to B-N fault

5400 KV Patiala(PG)-Patran(PATR) (PATRAN) Ckt-1

Forced Tripped

POWERGRID,PATRAN

03-05-2020 18:52 03-05-2020 19:53line tripped due to hanged Y-Phase bandal conductor due to bad weather at Patiala .

6400 KV Roorkee(PG)-Rishikesh(UK) (PG) Ckt-1

Forced Tripped

POWERGRID,PTCUL

03-05-2020 22:36 04-05-2020 00:15Line tripped on B-N fault.FLR-RRK-3.71km/11.08kA.Rishikesh-R-Y,fault is in UPPCL/PITCUL portion.Heavy strom/rain reported

7 765 KV Anta-Phagi (RS) Ckt-2Forced Tripped

RRVPNL 04-05-2020 17:15 05-05-2020 17:02Tower bent at location No. 355,356,393 & 394 as reported by Rajasthan due to stormy weather.Line under patrolling.

LINE TRIPPING(400 kV and above) DUE TO INCLEMENT WEATHER DURING APR‐JUN 2020(NORTHERN REGION)

S.No

Element NameReq. Type

OwnerOutage Revival

Reason / Remarks


Date Time Date Time


S.No


OwnerOutage Revival

Reason / Remarks

8 765 KV Anta-Phagi (RS) Ckt-1Forced Tripped

RRVPNL 04-05-2020 17:16 05-05-2020 17:00Conductor broken at tower location No. 347to 349 as reported by Rajasthan due to stormy weather.Line under patrolling.

9400 KV Singrauli(NT)-Allahabad(PG) (PG) Ckt-3

Forced Tripped

POWERGRID

05-05-2020 02:19 05-05-2020 03:24Phase to earth fault R-N FD:23.07km, FC:16.8kA heavy thunderstorm at Allahabad

10 765 KV Bikaner-Ajmer (PG) Ckt-1Forced Tripped

POWERGRID

06-05-2020 00:28 06-05-2020 02:30tripped on Y-N fault.FLR-Bikaner-236.2km/1.87KA. Ajmer-40.72km/5KA.Heavy wind strom /rain reported.

11400 KV Aligarh-Muradnagar_1 (UP) Ckt-1

Forced Tripped

UPPTCL 10-05-2020 11:34 10-05-2020 16:16 line tripped due to bad weather .

12400 KV Koteshwar-Meerut (PG) Ckt-2

Forced Tripped

POWERGRID

10-05-2020 11:59 10-05-2020 13:08tripped at 1159 hrs on R-N fault,Kot-63.1km/3.3kA.heavy wind storm./rain reported

13400 KV Meja TPS(MUN)-Masoli(UP) (UP) Ckt-1

Forced Tripped

UPPTCL 10-05-2020 20:04 10-05-2020 00:59line tripped due to Y-N fault , z-1, fault current-1.804KA Dist : 16.893km Bad weather conditions.

14400 KV Anpara_B(UPUN)-Mau(UP) (UP) Ckt-1

Forced Tripped

UPPTCL 10-05-2020 21:01 10-05-2020 22:11line tripped due to R-N Fault phase, FC 2.95KA, FD 122.8KMtr Due to stormy weather

15400 KV Anpara_B(UPUN)-Sarnath(UP) (UP) Ckt-2

Forced Tripped

UPPTCL 10-05-2020 21:56 10-05-2020 23:12Line tripped due to B-N fault FC 4.953 KA, FD 169.7 KM From Sarnath end Due to stormy weather condition

16400 KV Singrauli(NT)-Rihand(NT) (PG) Ckt-2

Forced Tripped

POWERGRID

10-05-2020 22:39 10-05-2020 23:00Line tripped from Rihand end during thunderstorm,au tore closed successfully from Singrauli end.Z1,R Ph-e,19km from Rihand


Date Time Date Time


S.No


OwnerOutage Revival

Reason / Remarks

17400 KV Kanpur-Ballabhgarh (PG) Ckt-1

Forced Tripped

POWERGRID

13-05-2020 18:04 13-05-2020 21:10Tripped on B-N fault during heavy rain and windstorm.FLR-Ballabagarh-18.6KM/12.49KA.KNP-345.7KM.

18400 KV Kishenpur-NewWanpoh (PG) Ckt-3

Forced Tripped

POWERGRID

19-05-2020 14:54 19-05-2020 16:20Line tripped on RB fault. FLR Kishenpur: 105.43Km, 4.62KA & New Wanpoh: 29.36Km, 7.07KA Inclement weather (heavy wind).

19400 KV Dadri(NT)-Kaithal(PG) (PG) Ckt-1

Forced Tripped

POWERGRID

23-05-2020 16:41 23-05-2020 23:04Line Tripped on B-N fault (to Bad weather) . FLR Kaithal:24.6Km,IB=9.8KA, FLR Dadri: 177.8Km, IB=1.9KA.

20 400 KV Rajpura-Dhuri (PS) Ckt-1Forced Tripped

PSTCL 27-05-2020 18:07 27-05-2020 21:56 due to inclement weather

21220 KV RSD(PS)-Jessore(HP) (HPSEB) Ckt-1

Forced Tripped

HPSEB 27-05-2020 18:23 27-05-2020 20:02 due to inclement weather

22 765 KV Bhadla-Bikaner (PG) Ckt-1Forced Tripped

POWERGRID

29-05-2020 19:32 29-05-2020 23:48Tripped on Y-N fault.Bhadla-75.78km/2.33KA.Heavy wind storm/rain reported.


POWERGRID

30-05-2020 13:35 30-05-2020 18:55 line tripped due to bad weather .

24765 KV Jhatikara-Bhiwani (PG) Ckt-1

Forced Tripped

POWERGRID

31-05-2020 15:10 31-05-2020 18:28

Phase to earth fault Y-N Tripped on Y-N fault during heavy storm and raining .FLR:M1:Jhatikara-9km/14kA,Bhiwani-M1:73.3km/7.5kA,M2 72.8km/7.5kA.

25 400 KV Kurukshetra-Jind (PG) Ckt-2Forced Tripped

POWERGRID

31-05-2020 16:46 31-05-2020 18:56

Phase to earth fault B-N Line tripped on B-N fault, FLR-7.0 KM IB-13.0 KA from jind & FLR- 89.0 KM, IB-3.2KA from Kurukshetra end. (Due to bad weather conditions)

26400 KV Amritsar-Parbati Pooling Banala (PG) Ckt-1

Forced Tripped

POWERGRID

03-06-2020 15:38 03-06-2020 16:37line tripped due to R-Y fault fault current-IR=IY=2.3KA fault dist-234 km FROM AMRITSAR.during HEAVY RAIN & WIND .

27 400 KV Akal-Kankani (RS) Ckt-1Forced Tripped

RRVPNL 07-06-2020 22:13 07-06-2020 23:30Phase to earth fault. B-N fault. B-PH, IMPEDENCE RELAY OPERATED ONLY AKAL END DUE TO BAD WEATHER

28400 KV Gr.Noida(UPC)-Nawada(HV) (PG) Ckt-1

Forced Tripped

POWERGRID

10-06-2020 17:53 10-06-2020 19:35Tripped on B-N fault.FLR-Gr.noida-12.35km/16.5kA.Heavy wind storm reported.


Date Time Date Time


S.No


OwnerOutage Revival

Reason / Remarks

29400 KV Ballabhgarh-Maharanibagh (PG) Ckt-1

Forced Tripped

POWERGRID

10-06-2020 17:56 10-06-2020 19:02Tripped on B-N fault ,FLR-Balb-26.32km/10.04kA.Heavy wind storm reported in this area.

30400 KV Dadri(NT)-Maharanibagh(PG) (PG) Ckt-1

Forced Tripped

POWERGRID

10-06-2020 17:57 10-06-2020 19:11Tripped on B-N fault.FLR-Dadri-17.1km/15.28kA.Heavy wind storm repoted in this area.

31400 KV Roorkee-Dehradun (PG) Ckt-1

Forced Tripped

POWERGRID

15-06-2020 14:53 15-06-2020 22:34Phase to earth fault Y-N Heavy wind storm reported. Y-N fault. FLR, Dehradun-0.76KM/10.9KA, Roork-78.9KM/5.7KA

32400 KV Dehradun-Abdullapur (PG) Ckt-2

Forced Tripped

POWERGRID

15-06-2020 15:02 15-06-2020 16:06Phase to earth fault R-N Tripping during heavy wind storm. R-N fault. FLR, Dehradun-36.64KM/5.29KA

33 400 KV Bhiwani-Jind (PG) Ckt-2Forced Tripped

POWERGRID

20-06-2020 06:16 20-06-2020 09:42Tripped on R-N fault during heavy windstorm. F.C = 17.2kA, F.D = 15.77KM from Bhiwani end, F.C = 6.498kA. and F.D=56.42km from Jind end.

34400 KV Bhiwani(PG)-Kabulpur(HV) (PG) Ckt-1

Forced Tripped

POWERGRID

20-06-2020 06:18 20-06-2020 11:27Phase to earth fault R-N Tripped during heavy windstorm on R-N fault,FLR-(Station details )Bhiwani-M1-12.55KM/17.39KA,M2-12.7KM/16.9KA.


POWERGRID

20-06-2020 17:39 21-06-2020 15:50

Phase to earth fault R-N Tripped on R-N fault during heavy windstorm& rainfall.FLR:Moga-M1:149.4km/4.2kA,M2:155km/4kA,Bhiwani-103.4km/6.91kA.

36400 KV Kurukshetra(PG)-Nakodar(PSG) (PG) Ckt-1

Forced Tripped

POWERGRID

29-06-2020 00:28 29-06-2020 01:40Phase to phase fault Y-B Line Tripped on Y-B fault due heavy Thunderstrom and Lightning .FLR Kurukshetra:116km,IY=5.5KA,IB=5.2KA


S.No

RegionVoltage

LevelName of Line Owner of line

Reason as per outage report

Weather condition & Reason received

from utility

1 WR 765 765KV‐RAIPUR‐PS (DURG)‐CHAMPA‐2 POWERGRID‐WR1 (PGCIL)04/Apr/2020 16:29 04/Apr/2020 20:27 A/T due to L/A failure of NGR at Durg end.

Due to heavy rain & wind with thumderstorm line tripped during tripping of 765KV Durg ‐ Jharsuguda ckt # 2 on R‐Y phase to phase fault . After site inspection it

2 WR 765 765KV‐RAIPUR‐PS (DURG)‐JHARSUGUDA‐2 OGPTL04/Apr/2020 16:29 04/Apr/2020 20:11

A/T on R‐Y phase fault, 235km and 5.03kA from Jharsuguda end. Because of heavy wind storm

3 WR 765 765KV‐BINA‐GWALIOR‐3 POWERGRID‐WR2 (PGCIL)14/Apr/2020 17:15 14/Apr/2020 19:53

R phase to earth faultBina end : 233 km, 4.2 kAGwalior end: 36 km, 11.2 kA Tripping due to heavy winds and rains

4 WR 400 400KV‐CHANDRAPUR‐BHADRAWATI‐3 POWERGRID‐WR1 (PGCIL)19/Apr/2020 02:13 19/Apr/2020 05:37 B‐E fault

Due to heavy windstorm & thunderstorm along with heavy rain in Bhadrawati carridor leads to line tripped on B‐E fault,FD‐2.794km,FC‐22kA from Bhadrawati and

5 WR 400 400KV‐CHANDRAPUR‐BHADRAWATI‐4 POWERGRID‐WR1 (PGCIL)19/Apr/2020 02:13 19/Apr/2020 06:20 B‐E fault

Due to heavy windstorm & thunderstorm along with heavy rain in Bhadrawati carridor leads to line tripped on B‐E fault,FD‐2.794km,FC‐19kA from Bhadrawati and

6 WR 400 400KV‐JABALPUR‐PS‐MB POWER‐1 POWERGRID‐WR2 (PGCIL)20/Apr/2020 19:09 20/Apr/2020 19:38

A/T from MB Power end only on Y phase, Zone‐1, If= 5.7kA, 257km from MB Power end.

Heavy lightning and rain reported by site at the time of tripping

7 WR 765 765KV‐DHARAMJAYGARH‐RANCHI‐1 POWERGRID‐ER21/Apr/2020 02:45 11/May/2020 22:23

Initially B‐phase fault‐298km,3.26kA@D. Line is anti theft charged on 22.04.20 at 23:10 Hrs from Dharamjaygarh end.

Due to heavy windstorm & thunderstorm along with heavy rain leads to line tripped on R Ph ‐ Y Ph fault,FD‐293km,FC‐R‐4.136kA & Y‐3.821kA from Dharamjaygarh

8 WR 400 400KV‐LARA‐NTPC‐CHAMPA‐1 POWERGRID‐WR1 (PGCIL)21/Apr/2020 07:22 21/Apr/2020 10:07 B‐phase fault, 7.8KA, 59.8KM at Champa

Due to heavy windstorm & thunderstorm along with heavy rain leads Line tripped on B ph ‐ G faultChampa SS: 40kM, B ph‐G,7.28kA

10 WR 765 765KV‐DHARAMJAYGARH‐JABALPUR‐3 JTCL‐Sterlite24/Apr/2020 16:08 24/Apr/2020 17:15

Line tripped on Y ph‐E fault. From Dharamjaygarh end, distance‐31.1 km, fault current‐15.3 kA. From Jabalpur end, 356

LNCC Line tripped due to Transient fault Because of Thunderstorm & Lighting strike.

11 WR 765 765KV‐GWALIOR‐AGRA‐2 POWERGRID‐WR2 (PGCIL)26/Apr/2020 14:38 26/Apr/2020 15:30 Y‐E FAULT

Fault in NR‐3 Jurisdction. on patrolling found tripping due to swinging of jumpers during cyclonic winds and rains

12 WR 400 400KV‐KORBA‐NTPC‐BHILAI‐2 POWERGRID‐WR1 (PGCIL)26/Apr/2020 23:47 27/Apr/2020 02:37 Tripped on B ‐E fault

Line tripped on B‐E fault ,FD‐195.9km, FC‐1.84kA from Bhilai end & FD‐7.3km, FC‐100Amps from Korba(NTPC) end.

13 WR 765 765KV‐RAIPUR‐PS (DURG)‐JHARSUGUDA‐2 OGPTL27/Apr/2020 00:37 27/Apr/2020 03:14

Initially auto recloser successful in B phase then line tripped on B phase to earth faultRaipur end DetailsFault location : Transient fault because of heavy wind storm & Lighting

14 WR 765 765KV‐CHAMPA‐DHARAMJAYGARH‐1 POWERGRID‐WR1 (PGCIL)27/Apr/2020 00:51 27/Apr/2020 03:49 B‐E fault.

Substation blocked out due to external flashover of B‐ph CT of Main Bay of 765kV ICT‐1 (713) Stormy weather with Rains

15 WR 765 765KV‐BILASPUR‐DHARAMJAYGARH‐1 POWERGRID‐WR1 (PGCIL)27/Apr/2020 00:51 27/Apr/2020 06:03 B‐E fault.


16 WR 765 765KV‐DHARAMJAYGARH‐JHARSUGUDA‐3 POWERGRID‐WR1 (PGCIL)27/Apr/2020 00:51 27/Apr/2020 04:52 B‐E fault.


17 WR 765 765KV‐DHARAMJAYGARH‐JHARSUGUDA‐4 POWERGRID‐WR1 (PGCIL)27/Apr/2020 00:51 27/Apr/2020 07:38 B‐E fault.


18 WR 765 765KV‐Wardha‐RAIPUR‐PS (DURG)‐2 POWERGRID‐WR1 (PGCIL)29/Apr/2020 19:25 01/May/2020 14:48

A/T on B phase fault, 143 km from Durg end and fault current = 4.74 kA.; 227.7km,2.7kA @Wardha end; trial charged

Due to heavy windstorm & thunderstorm along with heavy rain leads to line tripped on B‐E fault, FD‐227.7km,FC‐2.74kA from Wardha end and FD‐

19 WR 765 765KV‐BINA‐JABALPUR‐1 POWERGRID‐WR2 (PGCIL)30/Apr/2020 0.6729 30/Apr/2020 16:47

Y phase to earth fault 6.64 km 18.62 kA from JBP PS229 km/4.9 kA from Bina Heavy rain along with wind reported by site

20 WR 400 400KV‐VINDHYACHAL‐JABALPUR‐1 POWERGRID‐WR2 (PGCIL)30/Apr/2020 16:43 18/May/2020 22:11

Y‐B phase fault Vindhyachal end : 336 km, 1.8 kAJabalpur end : 34.3 km, 11.8 km.04 nos towers (948‐951) collapsed.

04 no tower collapsed found between 948‐951 due to heavy rain and local circulating wind

Tripping Restoration

Weather related tripping in 400 KV and above lines in WESTERN REGION from 01st Apr20 to 17th June 2020


S.No

RegionVoltage




from utilityTripping Restoration


21 WR 400 400KV‐VINDHYACHAL‐JABALPUR‐2 POWERGRID‐WR2 (PGCIL)30/Apr/2020 16:43 18/May/2020 22:18 04 nos towers (948‐951) collapsed

04 no tower collapsed found between 948‐951 due to heavy rain and local circulating wind

22 WR 765 765KV‐BILASPUR‐Rajnandgaon‐RRWTL‐2 STL‐Adani01/May/2020 21:54 01/May/2020 23:51 B‐N and R‐N fault heavy wind and thunder stromy weather condition

23 WR 400 400KV‐WARORA‐PG‐PARLI‐1 PWTL‐POWERGRID02/May/2020 13:21 02/May/2020 13:38

Line tripped on R ph ‐E fault. From Warora end, 59.2 km, 6 kA fault current. From Parli end, 300 km, 1.14 kA fault current.

Due to heavy windstorm & thunderstorm along with heavy rain leads to line tripped on R Ph ‐G. fault, FC‐1.14 KA, FD‐300.2 Kms from Parli end and 6.03 KA, & FD‐59.2

24 WR 765 765KV‐GWALIOR‐Jaipur‐2 POWERGRID‐WR2 (PGCIL)03/May/2020 17:43 03/May/2020 20:01

tripped on B‐phase Fault. Gwalior end‐144.3 km, 4.9 kA

At the time tripping heavy thunder storm and circulating wind. fault under NR#1 jurisdiction

25 WR 765 765KV‐BINA‐GWALIOR‐3 POWERGRID‐WR2 (PGCIL)03/May/2020 0.8049 03/May/2020 22:38

tripped on Y‐B fault Details awaitedBina: 158 km, Iy=5.56 kA, Ib=5.31 kA Gwalior: 75 km, Iy=9.35 kA, Ib =9.35 kA

At the time tripping heavy thunder storm and circulating wind

26 WR 765 765KV‐GWALIOR‐AGRA‐1 POWERGRID‐WR2 (PGCIL)03/May/2020 19:34 04/May/2020 15:58

Line tripped on R‐E fault. Gwalior End: 58 kM, 7.48 kA

At the time tripping heavy thunder storm and circulating wind.Earthwire suspension clamp broken at loc. no. 174 and

27 WR 400 400KV‐KURUD‐JAGDALPUR‐1 Chattisgarh04/May/2020 16:00 04/May/2020 21:50

A/T due to tower bent on location number 430. Lightening and windy weather

28 WR 400 400KV‐BHILAI‐RAITA‐2 Chattisgarh04/May/2020 16:07 04/May/2020 20:28 Tripped on B‐E fault Lightening and windy weather

29 WR 765 765KV‐RAIPUR‐PS (DURG)‐JHARSUGUDA‐2 OGPTL04/May/2020 17:27 04/May/2020 21:30 Tripped on Y‐B fault

Transient fault (Y‐Phase to B Phase) because of heavy wind storm

30 WR 400 400KV‐Damoh‐BIRSINGPUR‐1 POWERGRID‐WR2 (PGCIL)04/May/2020 20:00 04/May/2020 20:56 Tripped on B‐E fault

Before A/R attempt, DT received from Birsinghpur end resulted in A/R failure. Suspected reason is DC earth fault (DC system at Birsinghpur belongs to MP GENCO)

31 WR 400 400KV‐JABALPUR‐PS‐MB POWER‐1 POWERGRID‐WR2 (PGCIL)04/May/2020 20:36 04/May/2020 20:59 Y phase to earth fault

Line A/T from MB power end only and charged at Jabalpur ps end.No fault in line. At the time tripping heavy thunder

32 WR 400 400KV‐JABALPUR‐PS‐MB POWER‐2 POWERGRID‐WR2 (PGCIL)04/May/2020 20:36 04/May/2020 22:53 Y phase to earth fault

At the time tripping heavy thunder storm and circulating wind

33 WR 400 400KV JPL(TAMNAR)‐RAIPUR I JPL06/05/2020 00:34 07/05/2020 18:42 R‐E fault

Relay Indication‐ Protection Operated : Distance protection , Line 1 : 108.3 KM, Fault current: : IA =3.444 KA, IB =

34 WR 765 765KV‐RAIPUR‐PS (DURG)‐JHARSUGUDA‐2 OGPTL08/May/2020 13:24 08/May/2020 13:25

AR successful Y‐Phase, Distance: 63.5 Kms, Fault Current: 10 KA, Because of heavy wind storm

35 WR 765 765KV‐BHOPAL‐BDTCL‐JABALPUR‐1 BDTCL‐Sterlite09/May/2020 15:45 09/May/2020 17:58

B phase to earth fault Jabalpur end: 30 km, 13.02 kA Bhopal end: 211.3 km, 3.18 kA

Line tripped because of wind strom which lead to broken down the tree branch and flew aways and comes in conatct with the line, attached here with the news

36 WR 765 765KV‐RAIPUR‐PS (DURG)‐JHARSUGUDA‐2 OGPTL09/May/2020 19:04 10/May/2020 00:35 R‐Y phase fault

Transient fault (R‐Phase to Y Phase) because of heavy wind storm

37 WR 400 400KV‐BINA‐MP‐BINA‐1 POWERGRID‐WR2 (PGCIL)09/May/2020 19:18 09/May/2020 20:57 R phase fault (PMU)

Line A/T at Bina (POWERGRID) end only. 86A & 86B master trip relay optd at Bina end. Heavy wind storm and rains reported at site at time of tripping

38 WR 400 400KV‐BINA‐MP‐BINA‐2 POWERGRID‐WR2 (PGCIL)09/May/2020 19:18 09/May/2020 20:58 R phase fault (PMU)

Line A/T at Bina (POWERGRID) end only. 86A & 86B master trip relay optd at Bina end. Heavy wind storm and rains reported at site at time of tripping

39 WR 765 765KV‐SATNA‐Orai‐1 POWERGRID‐WR2 (PGCIL)10/May/2020 15:40 10/May/2020 16:48

Line tripped on B‐E fault after successfully Autoreclosing at 15:39 hrs. From Satna end, 207.5 km, 3.9 kA. From Orai end, 56.22 km,

Severe windstorms and lightning in surrounding areas of Orai


S.No

RegionVoltage






40 WR 765 765KV‐GWALIOR‐Orai‐1 POWERGRID‐WR2 (PGCIL)10/May/2020 16:57 10/May/2020 18:05

Line tripped on R‐E fault (600 ms after B ph has tripped). From Gwalior end, fault dist‐84.4 km, fault current‐6.6 kA. From Orai

Severe windstorms and lightning in surrounding areas of Orai

41 WR 400 400KV‐WARORA‐PG‐PARLI‐2 PWTL‐POWERGRID10/May/2020 19:15 11/May/2020 15:45

Tripped on R‐E Fault. From Warora end, fault dist.‐47.85 km, fault current‐6.75 kA

Line tripped due to haevy wind storm with rain and lightning at Warora area leads to line tripped R‐E fault, FD‐47.85km, FC‐6.75kA from Warora end & M1: FD‐

42 WR 765 765KV‐INDORE‐KHANDWA‐2 JTCL‐Sterlite10/May/2020 21:40 10/May/2020 23:43

A/T on B‐phase fault 3.8KA, 60.9KM from Khandwa end Transient Tripping because of heavy wind storm

43 WR 400 400KV‐KORBA‐NTPC‐BIRSINGPUR‐1 POWERGRID‐WR1 (PGCIL)15/May/2020 17:48 15/May/2020 19:33

A/T on B phase zone‐1, 4.15kA and 77.73km from KSTPS end.

Due to heavy lightening, wind and thunderstorm line tripped on B ph ‐G fault.@ Korba‐NTPC: FD‐77.93kM; FC‐4.15kA


R phase to earth faultJabalpur end: 30.04 km, 13.05 kA

Line tripped due to Transient fault because of heavy wind storm & Lighting, attached here with the news paper cutting and photograph of lighting spot mark


Line tripped on R ph‐E fault.From Jabalpur, fault dist‐30 km, fault current‐13 kA. From bhopal end, 198 km, 2 kA

Line tripped due to transient fault because of bad weather condition, attached here with the photograph & news paper cutting.

46 WR 765 765KV‐SASAN‐Vindhyachal(PS)‐2 CWRTL‐Adani22/May/2020 12:09 22/May/2020 19:08

A/T on R‐phase fault, 22KA, 4.9KM from vindhyachal end Due to Hot & stormy weather and Heavy wind flow

47 WR 400 400KV‐VINDHYACHAL‐JABALPUR‐1 POWERGRID‐WR2 (PGCIL)24/May/2020 18:43 24/May/2020 20:08

Y‐B ph‐ph fault. Vindhyachal end:247.7km,Y‐2.7kA,B‐2.09kA. Jabalpur end:111.73km,Y‐4.6kA, B‐5.3kA. Heavy wind storm reported at the time of tripping

48 WR 765 765KV‐SASAN‐SATNA‐1 POWERGRID‐WR2 (PGCIL)28/May/2020 15:49 10/Jun/2020 17:18

A/T due to tower bent on location number 430.

Heavy cyclonic wind storm.On patrolling found tower bent at loc no‐ 430

49 WR 765 765KV‐SASAN‐SATNA‐2 POWERGRID‐WR2 (PGCIL)28/May/2020 15:50 28/May/2020 16:59


Line A/T on R Phase to E/F:Sasan end: F/L=145km, F/C=4.29ka &Satna end: F/L=95.59km, F/C=5.89ka

50 WR 400 400KV‐VINDHYACHAL‐SATNA‐2 POWERGRID‐WR2 (PGCIL)28/May/2020 15:52 28/May/2020 21:34

Tripped (Heavy to very heavy storms reported Tripping due to Heavy cyclonic Winds

51 WR 765 765KV‐SATNA‐Orai‐1 POWERGRID‐WR2 (PGCIL)28/May/2020 16:13 29/May/2020 04:23 Tripped on Y ph fault Tripping due to Heavy cyclonic Winds

52 WR 765 765KV‐SASAN‐SATNA‐2 POWERGRID‐WR2 (PGCIL)28/May/2020 17:09 07/Jun/2020 12:57


Heavy cyclonic wind storm.On patrolling found tower bent at loc no‐ 673

53 WR 765 765KV‐SATNA‐GWALIOR‐2 POWERGRID‐WR2 (PGCIL)28/May/2020 17:09 28/May/2020 21:29

Tripped on fault(Heavy to very heavy storms reported) Tripping due to Heavy cyclonic Winds

54 WR 765 765KV‐SATNA‐Vindhyachal(PS)‐1 POWERGRID‐WR2 (PGCIL)28/May/2020 17:18 29/May/2020 03:48

Tripped (Heavy to very heavy storms reported) Tripping due to Heavy cyclonic Winds

55 WR 765 765KV‐SATNA‐Vindhyachal(PS)‐2 POWERGRID‐WR2 (PGCIL)28/May/2020 17:18 29/May/2020 00:59


56 WR 765 765KV‐SATNA‐BINA‐1 POWERGRID‐WR2 (PGCIL)28/May/2020 17:18 28/May/2020 19:08


57 WR 765 765KV‐SATNA‐BINA‐2 POWERGRID‐WR2 (PGCIL)28/May/2020 17:18 28/May/2020 20:25


58 WR 765 765KV‐Vindhyachal(PS)‐JABALPUR‐1 PJTL‐POWERGRID28/May/2020 17:26 28/May/2020 20:54



S.No

RegionVoltage






59 WR 765 765KV‐Vindhyachal(PS)‐JABALPUR‐2 PJTL‐POWERGRID28/May/2020 17:26 30/May/2020 14:30


60 WR 765 765KV‐SASAN‐Vindhyachal(PS)‐1 POWERGRID‐WR2 (PGCIL)28/May/2020 17:26 28/May/2020 20:47


61 WR 400 400KV‐Vindhyachal(PS)‐SASAN‐1 POWERGRID‐WR2 (PGCIL)28/May/2020 17:26 28/May/2020 19:08


62 WR 400 400KV‐Vindhyachal(PS)‐SASAN‐2 POWERGRID‐WR2 (PGCIL)28/May/2020 17:26 28/May/2020 19:23


63 WR 400 400KV‐VINDHYANCHAL‐IV‐Vindhyachal(PS)‐1 POWERGRID‐WR2 (PGCIL)28/May/2020 17:26 28/May/2020 18:46


64 WR 400 400KV‐VINDHYANCHAL‐IV‐Vindhyachal(PS)‐2 POWERGRID‐WR2 (PGCIL)28/May/2020 17:26 28/May/2020 19:00


65 WR 400 400KV‐REWA‐SASAN‐1 POWERGRID‐WR2 (PGCIL)28/May/2020 17:26 28/May/2020 21:22


66 WR 400 400KV‐Vindhyachal(PS)‐RIHAND‐1 PGCIL‐NR28/May/2020 17:26 28/May/2020 18:45

Tripped (Heavy to very heavy storms reported)

Not WR#2 elements. Heavy to very heavy storms reported in the area

67 WR 400 400KV‐Vindhyachal(PS)‐RIHAND‐2 PGCIL‐NR28/May/2020 17:26 28/May/2020 19:30


Not WR#2 elements. Heavy to very heavy storms reported in the area



The tripping occured in S‐V line & V‐V line Ckt 3 & 4 due to grid failure i.e grid black out due to heavywind and thunder storm weather.

69 WR 400 400KV‐VINDHYANCHAL‐IV‐Vindhyachal(PS)‐3 CWRTL‐Adani28/May/2020 17:26 28/May/2020 20:02



70 WR 400 400KV‐VINDHYANCHAL‐IV‐Vindhyachal(PS)‐4 CWRTL‐Adani28/May/2020 17:26 28/May/2020 20:02





Tripping due to Heavy cyclonic Winds. E/W open at loc no 114

72 WR 400 400KV‐GWALIOR‐MORENA‐1 CWRTL‐Adani29/May/2020 19:08 29/May/2020 20:16 Tripped on R‐E dault heavy wind and thunder stromy weather condition

73 WR 765 765KV‐GWALIOR‐AGRA‐1 POWERGRID‐WR2 (PGCIL)29/May/2020 19:10 30/May/2020 11:47 Tripped on B‐E fault Tripping due to Heavy cyclonic Winds



Line A/T on R phase to E/F:Gwalior end: f/l=35.5km, f/c=10.8ka andAgra end: f/l=86.4km, f/c=6.61ka

75 WR 400 400KV‐KORBA WEST‐RAITA‐1 Chattisgarh29/May/2020 20:02

Y‐B ph fault (Tower collapsed/fall I.e. loc no. 160,159,158.near Beltara.) Strong winds and lightening

77 WR 400 400KV‐Raigarh‐JHARSUGUDA‐4 POWERGRID‐WR1 (PGCIL)30/May/2020 00:24 30/May/2020 08:51

Y‐E fault. FD‐145.5km, FC‐3.015kA from Raigarh end

Line tripped on Y‐G fault. FD‐145.5km, FC‐3.015kA from Raigarh end.

78 WR 400 400KV‐ASOJ‐CHORANIA‐2 Gujarat30/May/2020 20:31 30/May/2020 21:16

Y‐phase fault; 80.89km, 3.72k@Asoj; 47.8km, 6.189kA@ Chorania

Windy & Cloudy Atmoshere Trial taken at 21:16 Stood Ok


S.No

RegionVoltage






79 WR 400 400KV‐VINDHYACHAL‐JABALPUR‐2 POWERGRID‐WR2 (PGCIL)31/May/2020 14:28 31/May/2020 17:59

A/T on B phase Zone‐1 1.044km and 21.25kA from VSTPS end. SOTF operated from VSTPS end. Tripping due to Heavy cyclonic Winds


A/T on Y phase fault, 2.5km and 15.4kA from Vindhyanchal PS end. Due to thunder stromy weather condition

81 WR 400 400KV JPL(TAMNAR)‐RAIPUR I JPL31/05/2020 14:36 31/05/2020 16:36 B‐E fault

Relay Indication‐ Protection Operated : Distance protection , Line 1 : Fault Distance‐ 171 KM, Fault current: IA = 136

82 WR 400 400KV JPL(TAMNAR)‐RAIPUR II JPL31/05/2020 14:36 31/05/2020 16:39 R‐E fault

Relay Indication‐ Protection Operated : Distance protection , Fault Distance‐ 205 KM

84 WR 765 765KV‐Wardha‐AURANGABAD‐3 POWERGRID‐WR1 (PGCIL)31/May/2020 16:00 31/May/2020 16:27 A/T on B phase fault.

Line tripped due to heavy wind storm in Jalna area leads to line tripped on B‐G fault, M2: FD‐276km, FC‐2.82kA from Wardha end & M1: FD‐59.67km, FC‐8.0kA , M2: FD‐

85 WR 765 765KV‐Wardha‐AURANGABAD‐4 POWERGRID‐WR1 (PGCIL)31/May/2020 16:00 31/May/2020 16:18 A/T on B phase fault.

Line tripped due to heavy wind storm in Jalna area leads to line tripped on B‐G fault, M1: FD‐310km, FC‐2.6kA, M2: FD‐303km, FC‐2.4kA from Wardha end & M1: FD‐

86 WR 400 400KV‐KORBA WEST EXTENSION‐MARWA‐1 Chattisgarh31/May/2020 18:15 05/Jun/2020 14:49

due to inclement weather and heavy thunderstorm and rain (Detail awaited). Stormy weather

87 WR 400 400KV‐KORBA WEST EXTENSION‐BHILAI‐1 Chattisgarh31/May/2020 18:15 31/May/2020 21:23

due to inclement weather and heavy thunderstorm and rain (Detail awaited). Stormy weather

88 WR 400 400KV‐CHORANIA‐KOSAMBA‐1 Gujarat01/Jun/2020 21:13 01/Jun/2020 22:15 tripped on Y‐E fault

Windy & Cloudy Atmoshere Trial taken at 22:15 Stood Ok

89 WR 400 400KV‐APL‐MUNDRA‐HADALA‐1 Gujarat03/Jun/2020 17:34 03/Jun/2020 22:08 Line tripped on B ph fault.

Due to heavy wind observed near Samkhiyali area line tripped . Patrolling carried out , nothing found abnormal

90 WR 400 400KV‐CGPL‐BACHAU‐2 POWERGRID‐WR2 (PGCIL)03/Jun/2020 17:44 03/Jun/2020 17:45

Line A/R on R ph‐E fault. From Bhachau end, 5.8 km, 20 kA. From CGPL end,89 km, 3.17 km.

There was heavy wind, rain and lightetening at entire area due to the effect of Nisarga Cyclone and it may be the reason of tripping

91 WR 400 400KV‐CGPL‐BACHAU‐2 POWERGRID‐WR2 (PGCIL)03/Jun/2020 17:47 03/Jun/2020 17:48

Line A/R on R ph‐E fault. From Bhachau end, 5.6 km, 20 kA. From CGPL end,89 km, 3.17 km.

There was heavy wind, rain and lightetening at entire area due to the effect of Nisarga Cyclone and it may be the reason of tripping

92 WR 400 400KV‐APL‐MUNDRA‐CHARANKA‐1 APL‐Adani03/Jun/2020 18:01 03/Jun/2020 21:10

Line tripped on Y ph fault. From Mundra, Z1, 169 km, 2.38 km. From Charanka, Z1, 6.2kA, 34.6 km

At mundra weather normal condition and charanka end windy, no reason observed.


A/T on Y‐Phase E/F, ZONE‐1, 172KM, fault current‐2.38kAmp.@APL


94 WR 400 400KV‐DEHGAM‐RANCHODPURA‐1 Gujarat04/Jun/2020 02:23 04/Jun/2020 14:40

A/T on R‐Y phase fault Zone‐1, 5.402km and 10.28kA from Ranchodpura end.

At loc no: 98 R & Y ph top disc insulator found flashed. Heavy lightning observed

95 WR 400 400KV‐TARAPUR 3&4‐PADGHE‐1 POWERGRID‐WR2 (PGCIL)04/Jun/2020 08:38 04/Jun/2020 16:44

Line tripped on Y‐B fault. From Padghe end, 66 km,4 kA in Y & B phase.

At loc no‐ 47‐48 OPGW rope open & hanging due to heavy wind & rain

96 WR 400 400KV‐AKOLA‐AURANGABAD‐1 POWERGRID‐WR1 (PGCIL)04/Jun/2020 13:38 04/Jun/2020 21:42

Line tripped on R‐E fault. From Aurangabad end, 6.5 km, 26 kA

Due to heavy windstorm & thunderstorm along with heavy rain leads to line tripped on R phase to E fault,Main‐1‐FD‐6.465km,FC‐26.372kA & Main‐2‐FD‐

97 WR 400 400KV‐CHARANKA‐VARSANA‐1 Gujarat04/Jun/2020 22:09 04/Jun/2020 23:50

A/T on Y‐phase E/F 3.6KA, 97.72KM @Varsana end. 6.93KA 26.48KM @Charanka end Heavy wind strom with rain at both end. Transient fault.


A/T on Y phase E/F 150KM, 2.58KA@APL end.



S.No

RegionVoltage






99 WR 400 400KV‐CHARANKA‐KANSARI‐1 Gujarat05/Jun/2020 16:10 05/Jun/2020 22:00 Tripped on B‐E fault No cause of tripping found, Heavy win strom with rain.

101 WR 400 400KV‐CGPL‐JETPUR‐1 POWERGRID‐WR2 (PGCIL)05/Jun/2020 20:48 05/Jun/2020 21:57

Y phase to earth fault CGPL End: 2.44 kA, 186 km

There was heavy Rainfall and winds in entire area which may be cause of tripping.

103 WR 400 400KV‐APL‐MUNDRA‐HADALA‐1 Gujarat05/Jun/2020 22:16 06/Jun/2020 09:38

B Phase distance protection zone‐1, fault location – 179.9 Km and fault current‐ 1.968 KA.

During tripping heavy wind & rain observed.On dt:06.06.20 Ground petrolling(,Hadala Juridistion) carried‐out from loc no:661 to682 ,nothing found


A/T on R phase, 4.9kA and 74km pilot protection operated at APL end.



A/T on R phase, 2.49km Ir=22.37kA and SOTF operated.

Heavy Rain/ wind at varsana end & Ground Patrolling done by Anjar Line team from loc no. 1 to 25 but no cause found.

106 WR 765 765KV‐Bhuj‐Banaskantha‐1 POWERGRID‐WR2 (PGCIL)07/Jun/2020 15:01 07/Jun/2020 23:27

tripped on Y‐phase fault; broken conductor connector of Y phase towards Switch yard side at Bhuj end. found

Y‐phase fault; broken conductor connector of Y phase towards Switch yard side at Bhuj end Found

107 WR 400 400KV‐APL‐MUNDRA‐HADALA‐1 Gujarat07/Jun/2020 16:21 07/Jun/2020 18:09

A/T on R phase zone‐1, 22km and 9.8kA from APL end.

Due to heavy rain and wind near Mundra area line tripped. Trial taken from Hadala end and Line stood OK.

108 WR 400 400KV‐APL‐MUNDRA‐SAMI‐2 ATIL‐Adani07/Jun/2020 16:44 07/Jun/2020 17:16 A/T due to distance trip in Y phase.

Wind Speed High (18.1 Kmph) heavy wind pressure and rain at fault location area

109 WR 400 400KV‐CGPL‐JETPUR‐1 POWERGRID‐WR2 (PGCIL)07/Jun/2020 17:50 07/Jun/2020 18:51

A/T on Y‐phase E/F, Z1, 2.44KA, 184KM@CGPL end.

There was heavy Rainfall and winds in entire area which may be cause of tripping.

113 WR 765 765KV‐SEONI‐Wardha‐1 POWERGRID‐WR1 (PGCIL)10/Jun/2020 16:35 10/Jun/2020 17:47

On Y‐B fault , Wardha end ‐FC‐26.85, FD‐0KM Seoni end FC‐3.744kA FD 267kM

Due to heavy windstorm & thunderstorm along with heavy rain leads to line tripped on Y to B phase to phase fault.

114 WR 765 765KV‐DHARAMJAYGARH‐JABALPUR‐4 JTCL‐Sterlite11/Jun/2020 13:34 11/Jun/2020 15:46 Tripped on Y‐Phase fault, D

Transient Tripping because of heavy wind storm & Lighting

115 WR 765 765KV‐BHOPAL‐BDTCL‐INDORE‐1 BDTCL‐Sterlite11/Jun/2020 17:49 11/Jun/2020 20:54 Tripped on B‐E fault Transient Tripping because of heavy wind storm


A/T on R‐Phase E/F, 2.59KA, 160KM, SOTF operated @Varsana end

Heavy wind strom with rain at Charanka end & R‐ph LA fire at Charnka end.

117 WR 400 400KV‐RAITA‐KURUD‐1 Chattisgarh12/Jun/2020 20:22 12/Jun/2020 21:25

A/T on B‐Phase E/F 1.4KA, 82KM@Kurud end. 13.0KA, 8KM@Raita end Rainy


A/T on Y‐phase E/F Z‐1, 2.62KA @Adani end


119 WR 400 400KV‐ASOJ‐WANAKBORI‐1 Gujarat13/Jun/2020 10:45 13/Jun/2020 11:47

Tripped on B‐E fault. A/R successful at Asoj end. Breaker is closed at Asoj end.

Rainy & Ground patrolling carried out loc no 92 to 107, No cause found.

120 WR 765 765KV‐DHARAMJAYGARH‐JABALPUR‐2 POWERGRID‐WR2 (PGCIL)13/Jun/2020 15:44 13/Jun/2020 16:01

Tripped on Y‐E fault. 125 km, 6.6 kA from Jabalpur end

Heavy rainfall & storm at the time of tripping reported at site

121 WR 400 400KV‐Raigarh‐JHARSUGUDA‐1 POWERGRID‐WR1 (PGCIL)14/Jun/2020 01:51 14/Jun/2020 05:54

Y phase to earth faultRaigarh end: 3.19 kA 110 km

Due to heavy wind and thunderstorm near Jharsuguda area line A/R successful on Y‐G fault but tripped during persistent Y‐G fault. Double end fault details from


S.No

RegionVoltage






122 WR 765 765KV‐DHARAMJAYGARH‐JHARSUGUDA‐2 POWERGRID‐WR1 (PGCIL)14/Jun/2020 03:53 14/Jun/2020 05:18

R‐E fault. Dharamjaygarh end:fault distance‐15km, fault current‐22kA.

Due to heavy wind and thunderstorm near Dharamjaygarh area line A/R successful on R‐G fault but tripped during persistent R‐G fault. Fault details from


R‐E fault. Dharamjaygarh end:fault distance‐1.6km, fault current‐32kA.

Due to heavy wind and thunderstorm near Dharamjaygarh area line A/R successful on R‐G fault but tripped during persistent R‐G fault. Fault details from


R‐B Ph‐Ph fault. Dharamjaygarh end:Dist ‐ 42.5km, Ir‐ 16.45 kA, Ib ‐17.2 kA

Due to heavy wind and thunderstorm near Dharamjaygarh area, line tripped on R‐B to G fault. Fault details from Dharamjaygarh: M‐1: 42.54km and R‐

125 WR 400 400KV‐SIPAT‐RANCHI‐2 POWERGRID‐WR1 (PGCIL)15/Jun/2020 07:56 15/Jun/2020 10:24

A/T on B phase fault, 361.2km and 1.5kA from Ranchi end.

Due to heavy wind and thunderstorm near Bilaspur area, line tripped on B ph to G fault. Fault details from Sipat: FD‐59km and FC‐3kA and Ranchi: FD‐361.2km and

127 WR 765 765KV‐Banaskantha‐Chittorgarh‐1 POWERGRID‐WR2 (PGCIL)16/Jun/2020 16:09 16/Jun/2020 18:58

A/T on R‐Y phase, 2kA and 250.2km from Banaskantha end.

During said transient heavy rain and storm reported by site, Fault in NR#1 jurisdiction

128 WR 400 400KV‐BHOPAL‐MP‐BHOPAL‐BDTCL‐2 BDTCL‐Sterlite17/Jun/2020 18:21 17/Jun/2020 19:43 B‐E fault.

Transient Tripping because of heavy wind storm & Lighting

129 WR 765 765KV‐BINA‐GWALIOR‐3 POWERGRID‐WR2 (PGCIL)17/Jun/2020 21:11 44000 0.62 Tripped on R‐ph to Earth fault

During said transient fault Heavy rain along with thunderstorm reported by site.Snapped E/W found at loc no 512


Date Time Date Time

1 ER 765 KV 765KV-SASARAM-FATEHPUR-1 POWERGRID 30/05/20 17:27 30/05/20 19:12

TRIPPED DUE TO R-N FAULT FAULT, F.D=267.4 KM FROM SASARAM, F.C=1.4KA. THERE WAS HEAVY WINDSTROM AND LIGHTENING AT SITE.

2 ER 765 KV 765KV GAYA VARANASI -1 POWERGRID 19/04/20 18:39 19/04/20 19:59

TRIPPED ON B-N FAULT.F.D.=30KM FROAM GAYA, F.C=4.4KA. INSULATOR FLASHED OVER DUE TO SEVER LIGHTINING A,THUNDER & CYCLONE.


TRIPPED DUE TO R-N FAULT.F.D.=214.6 KM FROM GAYA(NR-III JURIDISCTION) = ,F.C.=2.53 KAMP.SUSPENSION CLAMP OF EARTH WIRE FAILED AT LOC NO.170 UNDER NR-III JURIDISCTION DUE TO SEVERE CYCLONE AND THUNDER AROUND THE AFFECTED AREA.


TRIPPED ON B-N FAULT, F.D=131.2KM FROM GAYA, F.C=3.97KA. LINE TRIPPED DUE TO HEAVY THUNDERSTORM AND RAIN AROUND THE FAULT AFFECTED AREA.

5 ER 400 KV 400KV-SAGARDIGHI-SUBHASGRAM-1 POWERGRID 20‐05‐20 17:48 20‐05‐20 19:57Tripped during super cyclone 'AMPHAN'.R/I at Subhasgram: R-N, Z1, F/D:26KM, F/C: 14KA

6 ER 400 KV 400KV-RANGPO-BINAGURI-1 POWERGRID 26‐05‐20 18:57 26‐05‐20 19:22Line tripped during heavy rain and thunderstorm.R/I at Binaguri: B-N fault,F/C:13.99KA, F/D: 13.41KM

7 ER 400 KV 400KV-RAJARHAT-SUBHASGRAM-1 POWERGRID 20‐04‐20 23:51 21‐04‐20 00:30

Tripped during during heavy lightning,rain & thunderstorm near Subhasgram.R/I at Subhashgram : R-N,Z1,FD-0 km,FC-9.53 kA.R/I at Rajarhat : R-N,FD-32.95,FC-6.285 kA.

8 ER 400 KV 400KV-MAITHON -DURGAPUR-2 POWERGRID 10‐05‐20 17:10 10‐05‐20 18:28

Line tripped.R/I at Durgapur: BN,FC-7.161 kA,FD-70.01(100%) km.R/I at Maithon: BN,FC-17.75 kA,FD-5.5 km.Heavy rain,thunderstorm,lightning observed at maithon end.

9 ER 400 KV 400KV-JEERAT-RAJARHAT-1 POWERGRID 20‐05‐20 18:38 20‐05‐20 21:46Tripped during super cyclone 'AMPHAN'.R/I at Rajarhat: B-N, F/D:3.9KM, F/C: 2.32KA

10 ER 400 KV 400KV-DURGAPUR -JAMSHEDPUR-1 POWERGRID 02‐04‐20 12:22 02‐04‐20 18:02

Line Tripped . R/I at Durgapur end: R-N fault, FC:6.13 KA, FD: 41.1 KM.. Charging attempt was taken at 12:42 Hrs. on 02.04.2020 by extending from Durgapur end but tripped immediatly on SOTF. R/I at Durgapur end: R-N fault, FC:6.42,FD:40.755 KM. Due to local storm , a small Tree drop came on x-arm at tower loc no 143 which resulted earth fault R-Phase to ground.

List of Lines tripped on account of thunderstorm during Apr‐May‐June 2020 ( 400 kV and above ) EASTERN REGION

S.No Region Voltage Level Name of Line Owner of line Tripping Restoration Reason Reported


Date Time Date Time



11 ER 400 KV 400KV-BONGAIGAON -BINAGURI-2 POWERGRID 21‐04‐20 12:07 21‐04‐20 12:40Tripped during heavy lightning,rain & thunderstorm.R/I at Binaguri end:B-N,Z-1 F/C-1.9kA F/D-157.2 KM

12 ER 400 KV 400KV-ANDAL-JAMSHEDPUR-2 POWERGRID 21‐04‐20 02:53 21‐04‐20 04:16

Tripped during during heavy lightning,rain & thunderstorm.R/I at Jamshedpur end : R-N,Z1,FD-0.421KM,FC-23.74KA..R/I at Andal end : R-N,Z2,FD-237KM,FC-1.627KA.

13 ER 400 KV 400KV PATNA BALLIA -3 POWERGRID 19/04/20 19:48 21/04/20 13:43

TRIPPED DUE TO B-N FAULT CAUSED BY SEVERE THUNDERSTORM AROUND THE FAULT AREA. FAULT DETAILS FROM PATNA :-F.D=90KM AND F.C=5KA. BROKEN EARTH WIRE FOUND AT LOC NO 412

14 ER 400 KV 400KV LAKHISARAI BIHARSARIF-1 POWERGRID 26/05/20 23:50 27/05/20 17:51

TRIPPED DUE TO Y-N FAULT.F.D.=102.9 KM FROM BIHARSHARIFF, F.C.=3.17 KA. THERE WAS HEAVY WINDSTROM & LIGHTENING AT SITE.

15 ER 400 KV 400KV KODERMA GAYA-1 POWERGRID 17/04/20 11:49 17/04/20 12:28

TRIPPED DUE TO B-N FAULT, F.D=113 KM FROM GAYA, F.C=2.76 kA. THERE WAS SEVERE LIGHTNING AND THUNDERSTORM AROUND THE AFFECETED AREA.

16 ER 400 KV 400KV KODERMA BOKARO-1 POWERGRID 30/05/20 12:58 30/05/20 20:37

TRIPPED ON B-N FAULT.MAIN-I DETAILS AT KODERMA END-F.D.=22.4 KM FROM KODERMA,F.C.=NA,MAIN-II DETAILS AT KODERMA END-F.D.=15 KM.THERE WAS SEVERE LIGHTNING,HEAVY RAIN AND THUNDERSTORM AROUND THE AFFECTED AREA.

17 ER 400 KV 400KV KODERMA BIHARSARIF-1 POWERGRID 07/05/20 14:43 07/05/20 19:55

TRIPPED DUE TO R-Y-B FAULT. FD-53.57KM FROM BIHARSHARIF AND FC-Ir-10.5KM.Iy-9.96KA,Ib-10.87KA.THERE WAS SEVERE LIGHTNING,HEAVY RAIN AND THUNDERSTORM AROUND THE AFFECTED AREA.

18 ER 400 KV 400KV KISHANGANJ PATNA-2 POWERGRID 15/04/20 04:32 15/04/20 19:42

TRIPPED DUE TO Y-B FAULT. FAULT DETAILS FROM PATNA:- FD-139.6 KM , FC- Iy-4.475KA,Ib-4.79KA. THERE WAS SEVERE CYCLONE,HEAVY RAIN AND LIGHTNING AROUND THE AFFECTED AREA.


TRIPPED DUE TO Y-B FAULT, F.D.=206.8 KM FROM KISHANGANJ, F.C.=Iy-3.42 KA, Ib-2.98 KA. THERE WAS SEVERE LIGHTNING ,HEAVY RAIN AND THUNDER AROUND THE AFFECTED AREA.


Date Time Date Time




TRIPPED DUE TO Y-B FUALT, F.D.=139.5 KM FROM PATNA, F.C.=Iy-4.67 KA,Ib-4.78 KA. THERE WAS SEVERE LIGHTNING,HEAVY RAIN AND THUNDERSTORM AROUND THE AFFECTED AREA.


TRIPPED DUE TO Y-B FAULT, F.D.=139.9 KM FROM PATNA,F.C.=Iy-4.537 KA,Ib-4.766 KA.THERE WAS HEAVY WINDSTROM AND LIGHTENING AT SITE.

22 ER 400 KV 400KV KISHANGANJ PATNA-2 POWERGRID 14/05/20 15:09 14/05/20 15:34 TRIPPED DUE TO Y-N FAULT. FD-5.2KM FROM PATNA, FC-18.4KA. THERE WAS HEAVY WINDSTROM AND LIGHTENING AT SITE.


TRIPPED DUE TO Y-B FAULT, F.D=207.7KM FROM KISHENGANJ, F.C=Iy=3.46 KA, Ib=3.16 KA.THERE WAS HEAVY WINDSTROM AND LIGHTENING AT SITE.

24 ER 400 KV 400KV KISHANGANJ PATNA -1 POWERGRID 05/05/20 08:13 05/05/20 08:54

TRIPPED DUE TO R-N FAULT, F.D=19.69 KM FROM PATNA, F.C=9.219KA. THERE WAS HEAVY WINDSTROM AND LIGHTENING AT SITE.

25 ER 400 KV 400KV KHALGAON LAKHISARAI-2 POWERGRID 21/04/20 10:40 21/04/20 21:08

SD TAKEN FOR RECTIFICATION OF BROKEN OPGW WIRE AT LOC NO. 20-21 DUE TO SEVERE CYCLONE , THUNDERSTORM /LIGHTENING AROUND THE AFFECTED AREA.


TRIPPED DUE TO R-N FAULT.F.D.=4.42 KM FROM LAKHISARAI, F.C.=10.064 KA. THERE WAS HEAVY WINDSTROM AND LIGHTENING AT SITE.

27 ER 400 KV 400KV KHALGAON LAKHISARAI-1 POWERGRID 15/05/20 16:17 15/05/20 17:39 TRIPPED ON Y- N FAULT DUE TO SEVERE LIGHTENING. FD-.078KM FROM LAKHISARAI AND FC-11.145KA.


TRIPPED DUE TO Y-N FAULT, F.D.=35.76 M FROM LAKHIISARAI, F.C.=5.808 KA. THERE WAS HEAVY WINDSTROM AND LIGHTENING AT SITE.

29 ER 400 KV 400KV KHALGAON BARH-1 POWERGRID 26/05/20 23:20 27/05/20 18:29

TRIPPED DUE TO B-N FAULT, F.D.=31.98 KM FROM BARH, F.C.=11.19 KA.THERE WAS HEAVY WINDSTROM AND LIGHTENING AT SITE.

30 ER 400 KV 400KV KHALGAON BANKA-1 POWERGRID 13/05/20 09:01 13/05/20 19:16 REPLACEMENT OF FLASHED INSULATOR STRING DUE TO SEVERE LIGHTNING,HEAVY RAIN AND THUNDER


Date Time Date Time



31 ER 400 KV 400KV GAYA MAITHON-2 POWERGRID 06/04/20 18:36 08/04/20 15:32

TRIPPED DUE TO R-B FAULT. SITE DETAILS GAYA:-MAIN-I-R-B FAULT,IR=11.35 KAMP,IB=11.17 KAMP, F.D.=40.2 KM DUE TO HANGING OF CONDUCTOR.THERE WERE SEVER LIGHTNING,THUNDER & HEAVY RAIN AROUND THE AFFECTED AREA.

32 ER 400 KV 400KV FARAKKA-KHALGAON-2 POWERGRID 05/05/20 11:22 05/05/20 11:55

TRIPPED ONLY FROM FARKKA END ON B-N FAULT.A/R SUCCESSFUL AT KAHALGAON END.F.D.=26 KM FROM KAHALGAON,F.C.=12 KAMP.F.D.=15.THERE WAS SEVERE LIGHTNING,HEAVY RAIN AND THUNDERSTORM AROUND THE AFFECTED AREA.

33 ER 400 KV 400KV BIHARSHARIF VARANASI -1 POWERGRID 26/05/20 23:04 27/05/20 04:18

TRIPPED DUE TO B-N FAULT, F.D.=10 KM FROM BIHARSHARIFF, F.C.=18.03 KA. THERE WAS HEAVY WINDSTROM AND LIGHTENING AT SITE

34 ER 400 KV 400KV BIHARSARIF SASARAM-1 POWERGRID 26/05/20 23:04 27/05/20 08:27

LINE TRIPPED DUE TO R-N FAULT, F.D.=13.3 KM FROM BIHARSHARIFF, F.C.=15 KA.THERE WAS HEAVY WINDSTROM AND LIGHTENING AT SITE.

35 ER 400 KV 400KV BIHARSARIF MUZAFFARPUR-2 POWERGRID 26/04/20 11:23 27/04/20 19:25

TRIPPED DUE TO Y-N FAULT.F.D.=73.7 KM FROM MUZ,F.C.=4.12 KAMP.INSULATOR STRING DECAPPED AT LOC NO.147 DUE TO HEAVY RAIN AND LIGHTNING.


TRIPPED ON R-N FAULT.F.D.=24.3 KM FROM BSF,F.C.=10.7 KAMP.THERE WAS SEVERE LIGHTNING ,STORM AND HAEVY RAIN AROUND THE AFFECTED AREA.


TRIPPED DUE TO Y-N FAULT, F.D.=62.9 KM FROM BSF, F.C.=6.76 KA DUE TO INSULATOR DECAPPING . THERE WAS SEVER LIGHTENING AND WINDSTROM AT SITE.

38 ER 400 KV 400KV BANKA BIHARSARIF-2 POWERGRID 05/05/20 08:53 05/05/20 17:00

TRIPPED DUE TO B-N FAULT, F.D.=18.4 KM FROM BSF, F.C.=12.35 KA DUE TO INSULATOR DECAPPING DURING SEVERE LIGHTNING,HEAVY RAIN AND THUNDERSTORM AROUND THE AFFECTED AREA.

39 ER 400 KV 400KV BANKA BIHARSARIF-2 POWERGRID 26/05/20 23:40 27/05/20 01:24

TRIPPED DUE TO Y-N FAULT, F.D.=25.38 KM FROM BIHARSHARIFF, F.C.=9.8 KA. THERE WAS HEAVY WINDSTROM AND LIGTHENING AT SITE.


Date Time Date Time



40 ER 400 KV 400 KV RANCHI-RAGHUNATHPUR-1 POWERGRID 05/05/20 22:14 05/05/20 22:47

TRIPPED DUE TO R-N FAULT. F.D.=19.5 KM FROM RANCHI, F.C.=11.83 KA. THERE WAS SEVERE LIGHTNING,HEAVY RAIN AND THUNDERSTORM AROUND THE AFFECTED AREA.

41 ER 400 KV 400 KV RANCHI-MAITHON -1 POWERGRID 27/04/20 15:39 28/04/20 01:46

TRIPPED ON B-N FAULT.F.D.=16.8 KM FROM RANCHI,F.C.=4.2 KAMP.TRIPPED DUE TO SNAPING OF OPGW WIRE BETWEEN LOC NO.540-541 .THERE WAS SEVERE CYCLONE AND THUNDER AROUND THE AFFECTED AREA.

42 ER 400 KV 400 KV CHAIBASA-ROURKELA-2 POWERGRID 17/04/20 17:57 17/04/20 18:39

TRIPPED DUE TO R-N FAULT, {Chaibasa DETAILS , F.D=42.37KM FROM CHAIBASA, F.C=Ir=3.623KA, DURING HEAVY RAIN, WINDSTORM AND LIGHTNING.

43 ER 400 KV 400 KV CHAIBASA-ROURKELA-1 POWERGRID 21/04/20 06:35 21/04/20 07:17

TRIPPED DUE TO Y-N FAULT, F.D=82.408 KM FROM CHIABASA, F.C=3.870KA. (AFAS )THERE WAS SEVERE CYCLONE,THUNDER,LIGHTNING AND HEAVY RAIN AROUND THE AFFECTED AREA.

44 ER 400 KV 400 KV Alipurduar - Binaguri 3 ATL 09‐04‐20 18:28 10‐04‐20 16:42Tripped due to Massive Cyclone which hit several areas in North Bengal. ERLDC Charging Code : 214

45 ER 400 KV 400 KV Alipurduar - Binaguri 4 ATL 09‐04‐20 17:27 09‐04‐20 18:27Tripped due to Massive Cyclone which hit several areas of North Bengal. ERLDC Charging Code : 182

46 ER 765 KV 765kV Jharsuguda (sundargarh-PG)-Raipur (PG) Ckt2 OGPTL 04‐04‐20 16:29 04‐04‐20 20:11

Line tripped due to Transient fault (R-Phase to Y Phase) because of heavy wind storm, attached here with the news paper cutting.Charging clearance email attached for your reference.


Line tripped due to Transient fault because of heavy wind storm & Lighting, attached here with the news paper cutting and photograph of lighting spot mark in the earthwire.

48 ER 400 KV 400 kv (Quad ) D/C Bongaigaon - Alipurduar line CKT- 2(BNG- ALIP #2) ENICL 09‐04‐20 18:11 09‐04‐20 18:48

Line tripped due to transient fault because of thunderstorm & bad weather condition foreign material comes in contact with the line, on same time period in NER_Region 11 line tripped Attached here with the news paper cutting of bad weather condition.


Date Time Date Time



49 ER 400 KV 400 kv (Quad ) D/C Bongaigaon - Alipurduar line CKT- 1(BNG- ALIP #1) ENICL 09‐04‐20 18:17 09‐04‐20 18:58

Line tripped due to transient fault because of thunderstorm & bad weather condition foreign material comes in contact with the line, on same time period in NER_Region 11 line tripped Attached here with the news paper cutting of bad weather condition.


Line tripped due to Transient fault (Y-Phase to B Phase) because of heavy wind storm and lightening , attached here with the news paper cutting.Line outage was converted in to voltage regulation at 21:30 hrs on 04/05/2020


Line tripped due to Transient fault (R-Phase to Y Phase) because of heavy wind storm and lightening , attached here with the news paper cutting.

52 ER 400 KV 400KV-BINAGURI-TALA-4 POWERGRID + BPC 25‐05‐20 21:21 25‐05‐20 21:54

BAD WEATHER REPORTED AT SILIGURI,FAULT IS IN BHUTAN JURISDICTION;TRANSIENT FAULT MAY BE DUE TO LIGHTNING,

53 ER 400 KV 400KV-NEW PPSP-ARAMBAGH-2 WBSETCL 27‐05‐20 15:45 27‐05‐20 16:06 BAD WEATHER,TRANSIENT FAULT54 ER 400 KV 400KV-PPSP-BIDHANNAGAR-1 WBSETCL 27‐05‐20 15:42 28‐05‐20 13:38 BAD WEATHER,TRANSIENT FAULT55 ER 400 KV 400KV-DURGAPUR-SAGARDIGHI-1 WBSETCL 27‐05‐20 17:19 27‐05‐20 18:08 BAD WEATHER,TRANSIENT FAULT

56 ER 400 KV 400KV-BIDHANNAGAR-NEW CHANDITALA-1 WBSETCL 27‐05‐20 17:29 27‐05‐20 17:52 BAD WEATHER,TRANSIENT FAULT

57 ER 400 KV 400KV-BINAGURI-TALA-4 POWERGRID + BPC 29‐05‐20 14:22 29‐05‐20 15:00 BAD WEATHER REPORTED;TRANSIENT FAULT

58 ER 400 KV 400KV-SUBHASGRAM-HALDIA-1 HEL 20/05/20 15:48 20/05/20 16:03 Tripped due to Cyclone Amphan


Date Time Date Time



59 ER 400 KV 400KV-NEW CHANDITALA-KHARAGPUR-2 WBSETCL 20/05/20 16:03 20/05/20 22:36 Tripped due to Cyclone Amphan



62 ER 400 KV 400 KV CHANDITALA-BIDHANGAR WBSETCL 20/05/20 18:33 20/05/20 23:55 Tripped due to Cyclone Amphan

63 ER 400 KV 400 KV JEERAT - CHANDITALA WBSETCL 20/05/20 18:33 20/05/20 22:29 Tripped due to Cyclone Amphan

64 ER 400 KV 400KV-KOLAGHAT-ARAMBAGH WBSETCL 20/05/20 18:45 20/05/20 12:50 Tripped due to Cyclone Amphan

65 ER 400 KV 400KV-ARAMBAGH-NEW CHANDITALA-1 WBSETCL 20/05/20 18:45 20/05/20 20:24 Tripped due to Cyclone Amphan

66 ER 400 KV 400KV-JEERAT-BAKRESWAR-1 WBSETCL 20/05/20 19:40 20/05/20 21:02 Tripped due to Cyclone Amphan

67 ER 400 KV 400KV-JEERAT-SAGARDIGHI-1 WBSETCL 20/05/20 19:40 20/05/20 01:20 Tripped due to Cyclone Amphan

68 ER 400 KV 400KV-ALIPURDUAR (PG)-JIGMELLING-2

POWERGRID + BPC 06/04/20 01:29 06/04/20 02:33

TRANSIENT FAULT;BAD WEATHER;200 msec fault deionisation

69 ER 400 KV 400KV-MALBASE-BINAGURI-1 POWERGRID + BPC 06/11/20 20:21 06/11/20 21:07

BAD WEATHER;POSSIBLE TRANSIENT FAULT ON INSULATOR FLASHOVER

70 ER 400 KV 400 KV JHARSUGUDA-RAIGARH I POWERGRID 14/06/20 01:50 14/06/20 05:54Heavy rainfall with thundering reported. AR failure after 1 sec

71 ER 765 KV 765 KV JHARSUGUDA-DHARAMJAIGARH II POWERGRID 14/06/20 03:53 14/06/20 05:18

Heavy rainfall with thundering reported. AR failure after 1 sec

72 ER 765 KV 765 KV JHARSUGUDA-DHARAMJAIGARH III POWERGRID 14/06/20 04:02 14/06/20 05:18

Heavy rainfall with thundering reported. AR failure after 1 sec


Sending End Receiving End Date Time Date Time

1 SR 400kV 400kV NELAMANGALA - HIRIYUR 2 KPTCL PGCIL SR-2 11-Jun-20 19:58:00 12-Jun-20 08:28:00

TRIPPED ON OVER

VOLTAGE. Rainy

2 SR 400kV 400kV BOOPALPPALLI CHANDLAPUR LINE-1 TSGENCO TSTRANSCO 10-Jun-20 23:47:00 11-Jun-20 09:39:00

TRIPPED ON OVER

VOLTAGE.Rainy

3 SR 400kV 400kV MALKARAM SURYAPET-2 TSTRANSCO TSTRANSCO 10-Jun-20 21:45:00 12-Jun-20 11:26:00 THREE PHASE

FAULT Rainy

4 SR 400kV 400kV BPS - JAGALUR-1 KPTCL KPTCL 01-Jun-20 18:58:00 02-Jun-20 08:25:00 SINGLE PHASE FAULT Rainy & Windy

5 SR 400kV 400kV YTPS BPS-1 KPCL KPTCL 01-Jun-20 21:15:00 02-Jun-20 15:29:00 B-N FAULT Rain and Windy

6 SR 400kV 400kV RAMAGUNDAM - DICHCHIPPALLI

NTPC_RAMAGUNDAM TSTRANSCO 31-May-20 15:11:00 02-Jun-20 14:23:00 TRIPPED ON Y-N

FAULT Rain and Thunder

7 SR 400kV 400kV YTPS BPS-2 KPCL KPTCL 26-May-20 20:50:00 28-May-20 14:49:00 SINGLE PHASE FAULT

Heavy rain and lightning

8 SR 400kV 400kV MAHABOOB NAGAR -RAICHUR TSTRANSCO KPCL 26-May-20 20:41:00 27-May-20 11:08:00 R-N fault Thunder,lightning

with rain

9 SR 400kV 400kV HASSAN - NEELAMANGALA 1 SR-II, PGCIL KPTCL 25-May-20 17:32:00 25-May-20 19:39:00

TRIPPED DUE TO R-N

FAULT Rainy

10 SR 400kV 400kV NEYVELI TS 2 - NAGAPATNAM NLC SR-II, PGCIL 18-May-20 17:15:00 18-May-20 18:30:00 TRIPPED ON R-Y

FAULT Lightning and Rain

11 SR 400kV 400kV MTPS - KARAMADAI - 2 TANTRANSCO TANTRANSCO 17-May-20 18:11:00 17-May-20 23:12:00 TRIPPED ON B-N

FAULT Lightning and Rain

12 SR 400kV 400kV NELAMANGALA - MYSORE 2 KPTCL SR-II, PGCIL 17-May-20 18:01:00 19-May-20 11:05:00

TRIPPED ON OVER

VOLTAGE.Rainy

13 SR 765kV 765kV SRIKAKULAM - ANGUL 2 SR-I, PGCIL ER-II, PGCIL 16-May-20 18:00:00 16-May-20 18:12:00 TRIPPED ON Y-N

FAULT Heavy wind & rain

14 SR 400kV 400kV JEYPORE - GAZUWAKA 1 ER-I,PGCIL SR-I, PGCIL 15-May-20 13:11:00 15-May-20 13:31:00 B-N FAULT Heavy Wind

15 SR 400kV 400kV YTPS BPS-1 KPCL KPTCL 10-May-20 12:57:00 10-May-20 14:02:00 R-N FAULT Windy and Rainy

16 SR 400kV 400kV ALAMATHI - THIRUVALLAM-2 TANTRANSCO TANTRANSCO 29-Apr-20 04:37:00 29-Apr-20 06:51:00

SINGLE PHASE TO

GROUND FAULT Heavy rain and wind

17 SR 400kV 400kV-SHANKARAPALLY-NARSAPUR-1 TSTRANSCO TSTRANSCO 28-Apr-20 16:35:00 28-Apr-20 17:26:00 SINGLE PHASE

FAULT Rainy

18 SR 400kV 400kV GAJWEL NARSAPUR-1 TSTRANSCO TSTRANSCO 28-Apr-20 16:35:00 28-Apr-20 17:26:00

TRIPPED DUE TO B-N

FAULT INTUKKAPUR-NARSAPUR1

Rainy

Weather ConditionsOwner Tripping Restoration

S.No Region Voltage Level Name of Line Reason Reported

List of Lines tripped on account of thunderstorm during Apr‐Jun 2020 ( 400 kV and above ) SOUTHERN REGION


Sending End Receiving End Date Time Date TimeWeather Conditions

Owner Tripping RestorationS.No Region Voltage Level Name of Line Reason Reported

List of Lines tripped on account of thunderstorm during Apr‐Jun 2020 ( 400 kV and above ) SOUTHERN REGION

19 SR 400kV 400kV-TUKKAPUR-NARSAPUR-1 TSTRANSCO TSTRANSCO 28-Apr-20 16:35:00 28-Apr-20 17:26:00 B-N FAULT Rainy

20 SR 400kV 400kV TALAGUPPA - NEELAMANGALA KPTCL KPTCL 23-Apr-20 17:42:00 24-Apr-20 15:20:00 TRIPPED ON B-N

FAULT Rainy

21 SR 400kV 400kV RAMAGUNDAM - CHANDRAPUR 1

NTPC_RAMAGUNDAM WR-I,PGCIL 19-Apr-20 04:54:00 19-Apr-20 05:15:00

Due to heavy windstorm

& thunderstorm along

with heavy rain inBhadrawati

corridor

Heavy rain and thunder storms

22 SR 400kV 400kV MANALI NCTPS TANTRANSCO TANGEDCO 09-Apr-20 15:10:00 10-Apr-20 20:44:00 R-N FAULT Heavy rain and wind

23 SR 400kV 400kV KLVDPT - VALLUR 1 SR-II, PGCIL NTECL 09-Apr-20 15:26:00 09-Apr-20 19:09:00 Tripped on OV Raining

24 SR 400kV 400kV KLVDPT - VALLUR 2 SR-II, PGCIL NTECL 09-Apr-20 15:26:00 09-Apr-20 19:35:00 Tripped on OV Raining

25 SR 400kV 400kV ALAMATHI - VALLUR 2 TNEB NTECL 09-Apr-20 15:26:00 09-Apr-20 19:35:00 Tripped on OV Heavy rain and

thunder storms26 SR 400kV 400kV NELLORE - SPDR-2 SR-I, PGCIL SR-II, PGCIL 09-Apr-20 15:25:00 10-Apr-20 09:30:00 Tripped on OV Rain

27 SR 400kV 400kV VIJAYAWADA - NELLORE 1 SR-I, PGCIL SR-I, PGCIL 09-Apr-20 15:25:00 Tripped on OV Rain

28 SR 400kV 400kV KRISHNAPATNAM - NELLORE -2 APGENCO APTRANSCO 09-Apr-20 15:10:00 15-Apr-20 21:14 Tripped on OV Heavy rain

29 SR 400kV 400kV ANAIKAVADU - THAPPUGUNDU CKT-1 TANTRANSCO TANTRANSCO 08-Apr-20 17:42:00 08-Apr-20 19:12 TRIPPED ON R-Y

FAULTHeavy Lightning &

Thunder

30 SR 400kV 400kV RAICHUR PG - GOOTY 1 SR-I, PGCIL SR-I, PGCIL 07-Apr-20 19:04:00 07-Apr-20 19:56 LA BLAST AT

RAICHUR (PG) Heavy wind and Rain

31 SR 400kV 400kV RAICHUR PG - GOOTY 2 SR-I, PGCIL SR-I, PGCIL 07-Apr-20 19:04:00 07-Apr-20 19:56 LA BLAST AT


32 SR 400kV 400kV RAICHUR - RAICHUR PG 1 KPCL SR-I, PGCIL 07-Apr-20 19:04:00 07-Apr-20 19:56 LA BLAST AT


33 SR 400kV 400kV RAICHUR - RAICHUR PG 2 KPCL SR-I, PGCIL 07-Apr-20 19:04:00 07-Apr-20 19:56 LA BLAST AT


34 SR 400kV 400kV JSW TORANAGALLU-GUTTUR JSW KPTCL 07-Apr-20 16:10:00 08-Apr-20 16:40 TRIPPED ON

CONDUCTOR CUT Windy and Raining

35 SR 400kV 400kV SRISAILAM - DINDI -1 TSGENCO TSTRANSCO 06-Apr-20 14:14:00 09-Apr-20 14:14 single phase to

ground Rainy

36 SR 400kV 400kV MYSORE - KOZHIKODE 2 SR-II, PGCIL SR-II, PGCIL 06-Apr-20 19:54:00 06-Apr-20 20:05

TRIPPED ON OVER

VOLTAGE.

Heavy rain and thunder


Date Time Date Time1 NER 132 KUMARGHAT_R C NAGAR POWERGRID 03-Apr-20 16:45 03-Apr-20 17:04 TREE FELL ON LINE & TOWER BETWEEN LOC 81-82

2 NER 132 JIRIBAM - TIPAIMUKH #1 POWERGRID 03-Apr-20 17:04 08-Apr-20 17:34 A BIG TREE FELL ON CONDUCTOR FROM UPHILL SIDE AT LOC NO 238-239 DUE TO HEAVY STORM

3 NER 132 AIZWAL_KUMARGHAT POWERGRID 04-Apr-20 09:00 04-Apr-20 17:49TRIPPED DUE TO BAMBOO COMING PROXIMITY TO CONDUCTOR FROM OUTSIDE CORRIDOR DURING TURBULENT WEATHER

4 NER 400 BALIPARA_B.CHAIRALI #1 POWERGRID 04-Apr-20 12:54 04-Apr-20 13:05 BAMBOO INFRINGEMENT FROM OUTSIDE CORRIDOR B/W LOC 350-351 DURING STRONG WINDS.

5 NER 132 BADARPUR_KOLASIB POWERGRID 05-Apr-20 15:00 05-Apr-20 15:20 TRIPPED DURING INTENSE LIGHTNING AND THUNDERSTORM OVER THE KOLASIB REGION.

6 NER 400 BALIPARA_BONGAIGAON # 2 POWERGRID 09-Apr-20 20:41 09-Apr-20 20:55 DURING AN INTENSE STORM OVER REGION A BAMBOO TOUCHED LINE CONDUCTOR B/W LOC 502-503.

7 NER 400 Silchar - Azara NETC & AEGCL 09-Apr-20 21:21 09-Apr-20 21:29

SIL: R-N, Z-I, 173KM; AZARA: B-N, Z-I, 45.6KM.Heavy rain with thunderstorn was repoerted from site. The fault is due to lightning. Patrolling & Weather reports are enclosed..

8 NER 400 MISA_BALIPARA # 1 POWERGRID 09-Apr-20 22:27 09-Apr-20 22:49 TRIPPED DUE TO LIGHTINING STRIKE. FLASHOVER MARKS IN Y-PH INSULATOR DISCS AT LOC 90.

9 NER 400 MISA-BALIPARA #2 POWERGRID 09-Apr-20 22:27 09-Apr-20 22:51 TRIPPED DUE TO LIGHTINING STRIKE. FLASHOVER MARKS IN Y-PH INSULATOR DISCS AT LOC 90.

10 NER 400 Byrnihat-Bongaigaon NETC & MePTCL 10-Apr-20 01:09 10-Apr-20 16:21

BNG: R-N, Z-I, 138.6KM; BYR: Y-N, Z-I, 76.3KM. Heavy rain with thunderstorn was repoerted from site. The tripping of the line was due to lightning stroke.

11 NER 132 HAFLONG-UMRANGSO POWERGRID 11-Apr-20 16:48 11-Apr-20 17:06TRIPPED DUE TO LIGHTNINIG; BURNT MARKS FOUND IN R-PH CC RING AT LOC 58. INCLEMENT WEATHER AT SITE.

12 NER 400 BALIPARA_BONGAIGAON # 1 POWERGRID 15-Apr-20 12:27 15-Apr-20 12:33DURING INTENSE THUNDERSTORM TALL BAMBOO CAME INTO PROXIMITY OF Y-PH FROM OUSTIDE CORRIDOR.

13 NER 400 Byrnihat-Bongaigaon NETC & MePTCL 15-Apr-20 12:32 15-Apr-20 12:45 BNG: R-N, Z-II, 184.8KM. Heavy rain with thunderstorn was

repoerted from site. The fault is due to lightning.

14 NER 400 Silchar-Byrnihat NETC & MePTCL 15-Apr-20 12:51 15-Apr-20 12:59 SIL: B-N, Z-II, 197.4KM. Heavy rain with thunderstorn was

repoerted from site. The fault may be due to the lightning stroke.

15 NER 400 BALIPARA-BONGAIGAON #4 POWERGRID 15-Apr-20 14:14 15-Apr-20 14:27 BHALUKA BAMBOO INFRINGEMENT FROM OUTSIDE CORRIDOR B/W LOC 43-44 DURING STRONG WINDS.

16 NER 132 BADARPUR_KHLIERIAT POWERGRID 15-Apr-20 14:20 15-Apr-20 14:50 INTENSE LIGHTNING AND STORM PREVAILING OVER THE REGION.

17 NER 132 KUMARGHAT_R C NAGAR POWERGRID 15-Apr-20 17:22 16-Apr-20 16:16 R-PH CONDUCTOR SNAPPED B/W LOC. 183-184 DUE TO FALLING OF A LARGE TREE FROM OUTSIDE CORRIDOR.

18 NER 400 Pallatana_ Silchar 2 NETC 16-Apr-20 00:49 16-Apr-20 13:43SIL: Y-N, Z-II, 201KM; PAL: Y-N, Z-I, 54KM. Jumper sanpped due to severe wind storm and thunderstorm in various regions of the state.

19 NER 400 Silchar-Byrnihat NETC & MePTCL 17-Apr-20 02:28 17-Apr-20 02:55

SIL: R-N, Z-I, 37KM; BYR: 272KM, Z-III. Heavy rain with thunderstorn was repoerted from site. The fault may be due to the lightning stroke.

20 NER 132 JIRIBAM_HAFLONG POWERGRID 17-Apr-20 02:34 17-Apr-20 02:46 TRIPPED DUE TO LIGHTNING.21 NER 132 JIRIBAM - TIPAIMUKH #1 POWERGRID 17-Apr-20 02:36 17-Apr-20 03:00 TRIPPED DUE TO LIGHTNING

22 NER 400 SILCHAR-IMPHAL #2 POWERGRID 17-Apr-20 03:11 17-Apr-20 03:13 TRIPPED DUE TO LIGHTNING AND TURBULENT WEATHER

23 NER 132 SILCHAR - MELRIAT #2 POWERGRID 17-Apr-20 04:52 17-Apr-20 05:03 TRIPPED DUE TO LIGHTNING

Tripping RestorationList of Lines tripped on account of thunderstorm during Apr-Jun 2020 ( 132kV and above for NER) NORTH EASTERN REGION

S.No Region Voltage

Level Name of Line Reason ReportedOwner of line


Date Time Date TimeTripping Restoration

List of Lines tripped on account of thunderstorm during Apr-Jun 2020 ( 132kV and above for NER) NORTH EASTERN REGIONS.N

o Region Voltage Level Name of Line Reason ReportedOwner of

line24 NER 132 SILCHAR - MELRIAT #2 POWERGRID 17-Apr-20 06:58 17-Apr-20 07:23 TRIPPED DUE TO LIGHTNING25 NER 132 AIZAWL - TIPAIMUKH #1 POWERGRID 17-Apr-20 08:46 17-Apr-20 09:02 TRIPPED DUE TO LIGHTNING26 NER 132 KOLASIB-AIZAWL POWERGRID 18-Apr-20 14:22 18-Apr-20 14:43 TRIPPED DUE TO LIGHTNING.

27 NER 132 AIZWAL_KUMARGHAT POWERGRID 18-Apr-20 14:23 18-Apr-20 14:37TRIPPED DUE TO BAMBOO COMING PROXIMITY TO CONDUCTOR FROM OUTSIDE CORRIDOR DURING TURBULENT WEATHER

28 NER 132 AIZAWL - TIPAIMUKH #1 POWERGRID 18-Apr-20 14:38 18-Apr-20 14:48 TRIPPED DUE TO LIGHTNING

29 NER 132 KHANDONG_KHLIERIAT # 2 POWERGRID 20-Apr-20 04:24 20-Apr-20 04:42 TRIPPED DUE TO LIGHTNING. FLASHOVER AT LOC 5 R-PH GRADING RING

30 NER 132 AIZAWL - TIPAIMUKH #1 POWERGRID 20-Apr-20 07:41 20-Apr-20 08:54 TRIPPED DUE TO LIGHTNING

31 NER 132 KHANGDONG-UMRANGSO POWERGRID 22-Apr-20 15:47 22-Apr-20 16:23 TRIPPED DUE TO LIGHTNING. BURNT MARKS FOUND IN Y-PH INSULATOR CC RING AT LOC 15.

32 NER 132 KOLASIB-AIZAWL POWERGRID 25-Apr-20 16:37 27-Apr-20 13:47 B-PH CONDUCTOR SNAPPED B/W LOC 127-128 DUE TO FALLING OF BIG TREE FROM OUTSIDE LINE CORRIDOR.

33 NER 132 JIRIBAM - TIPAIMUKH #1 POWERGRID 30-Apr-20 01:12 30-Apr-20 06:37 DELAY DUE TO NO COMMUNICATION WITH TIPAIMUKH S/S. TRIPPED DUE TO LIGHTINING.

34 NER 132 HAFLONG-UMRANGSO POWERGRID 30-Apr-20 14:05 30-Apr-20 14:31 TRIPPED DUE TO LIGHTNING.

35 NER 400 Silchar-Byrnihat NETC & MePTCL 01-May-20 12:59 01-May-20 13:08 SIL. B-N, Z-I, 102.5KM, AZARA B-N, Z-I, 186.1KM

Tripping is caused due to lightning. 36 NER 132 KHANGDONG-UMRANGSO POWERGRID 01-May-20 14:21 01-May-20 14:50 TRIPPED DUE TO LIGHTNING37 NER 132 HAFLONG-UMRANGSO POWERGRID 03-May-20 00:09 03-May-20 00:33 TRIPPED DUE TO LIGHTNING

38 NER 400 BALIPARA_BONGAIGAON # 1 POWERGRID 12-May-20 15:52 13-May-20 15:21 TRIPPED DUE TO FAILURE OF R-PHASE INSULATOR AT LOC NO. 243 DUE TO LIGHTNING

39 NER 400 MISA_BALIPARA # 1 POWERGRID 12-May-20 21:26 12-May-20 21:56 TRIPPED DUE TO LIGHTNING.

40 NER 400 SILCHAR-IMPHAL #2 POWERGRID 13-May-20 02:47 13-May-20 03:02 TRIPPED DUE TO INFRINGEMENT OF A LONG BAMBOO FROM OUTSIDE CORRIDOR B/W LOC 114-115.

41 NER 132 KOLASIB-AIZAWL POWERGRID 13-May-20 07:16 13-May-20 07:55 TRIPPED DUE TO LIGHTNING.

42 NER 132 SILCHAR_PKBARI #2 POWERGRID 13-May-20 07:31 13-May-20 08:06 FLASHOVER MARKS FOUND IN B-PH(TOP PHASE) AT LOC 119. TRIPPED DUE TO LIGHTNING.

43 NER 132 SILCHAR-HAILAKANDI #1 POWERGRID 13-May-20 11:21 13-May-20 11:40 TRIPPED DUE TO LIGHTNING.44 NER 132 SILCHAR-HAILAKANDI #2 POWERGRID 13-May-20 11:21 13-May-20 11:37 TRIPPED DUE TO LIGHTNING.45 NER 132 BADARPUR_KHLIERIAT POWERGRID 13-May-20 12:14 13-May-20 12:26 TRIPPED DUE TO LIGHTNING.

46 NER 400 BALIPARA_B.CHAIRALI #3 POWERGRID 13-May-20 14:09 13-May-20 14:17 TRIPPED DUE TO INFRINGEMENT OF 2 CGI SHEETS AT LOC 13 DURING A THUNDERSTORM.

47 NER 132 JIRIBAM_HAFLONG POWERGRID 14-May-20 15:45 14-May-20 16:33 E/S/D TAKEN FOR BAMBOO CLEARING B/W LOC. 219-220 LEANING TOWARDS LINE FROM OUTSIDE CORRIDOR.

48 NER 400 Silchar-Byrnihat NETC & MePTCL 16-May-20 06:33 16-May-20 07:28 SIL: B-N, Z-I, 35KM; BYR: B-N, Z-II, 235KM.

Tripping is caused due to lightning.

49 NER 400 BALIPARA_B.CHAIRALI #4 POWERGRID 22-May-20 09:16 22-May-20 11:40TRIPPED DUE TO INFRINGEMENT OF FOREIGN OBJECT INTO B-PH CROSS ARM AT LOC 162 DURING HIGH WINDS.

50 NER 132 SILCHAR_PKBARI #2 POWERGRID 26-May-20 10:55 26-May-20 11:05 TRIPPED DUE TO LIGHTNING

51 NER 400 Silchar-Byrnihat NETC & MePTCL 26-May-20 21:53 26-May-20 22:13 SIL: B-N, Z-I, 72.8KM; BYR: B-N, Z-II, 183KM.

Tripping is caused due to lightning.

52 NER 132 BADARPUR_KHLIERIAT POWERGRID 26-May-20 22:12 26-May-20 22:33 TRIPPED DUE LIGHTNING AS BURNTMARK WAS OBSERVED IN Y-PH VIBRATION DAMPER AT LOC 9

53 NER 132 KUMARGHAT_R C NAGAR POWERGRID 30-May-20 08:28 30-May-20 08:44 FLASHOVER MARK AT LOC 32, Y -PH INSULATOR STRING DUE TO LIGHTNING.


Date Time Date TimeTripping Restoration

List of Lines tripped on account of thunderstorm during Apr-Jun 2020 ( 132kV and above for NER) NORTH EASTERN REGIONS.N

o Region Voltage Level Name of Line Reason ReportedOwner of

line54 NER 132 JIRIBAM - TIPAIMUKH #1 POWERGRID 31-May-20 07:50 31-May-20 08:04 TRIPPED DUE TO INFRINGEMENT OF BIRD NEST, FOUND

AT LOC. NO 07.


Distribution list ( Northern Region):

1. Managing Director, Delhi Transco Ltd., Shakti Sadan Building Kotla Road, New Delhi-110 002

2. General Manager (SLDC), Delhi Transco Ltd., SLDC Building, 33 kV Substation Building, Minto Road, New Delhi-110 002.

3. Chairman & Managing Director, Rajasthan RajyaVidyutPrasaran Nigam Limited, VidyutBhawan, Janpath, Jaipur- 302005

4. Chief Engineer(LD), State Load Despatch Centre, Rajasthan RajyaVidyutPrasaran Nigam Ltd., Ajmer Road,Heerapura, Jaipur-302024

5. Chairman & Managing Director, Punjab State Transmission Corporation Ltd. Regd. Office, PSEB Head office, The Mall, Patiala-147 001.

6. Chief Engineer (SLDC), SLDC Building, near 220KV grid substation, PSTCL, Ablowal, Patiala-147001.

7. Managing Director, PTCUL, VidyutBhawan, Near I.S.B.T. crossing, Sharanpur Road, Majra, Dehradun-248 001.

8. Chief Engineer(SLDC), VidyutBhawan, Saharanpur Road, Majra, Near ISBT, Dehradun-248001, Uttarakhand

9. Managing Director, HPSEB Limited, Kumar House, VidyutBhawan, Shimla-171 004Himachal Pradesh.

10. Director (SLDC), HP State Load Dispatch Centre, Totu, Shimla-171 001.

11. Chairman & Managing Director, Haryana VidyutPrasaran Nigam Ltd., Shakti Bhawan, Sector-6, Panchkula, Distt. Ambala, Haryana-134 109.

12. Chief Engineer (SO & SLDC), Haryana VidyutPrasaran Nigam Ltd., Shakti Bhawan, Sector-6, Panchkula, Distt. Ambala, Haryana-134 109. Ph: 0172-2560547.

13. Chief Engineer (Power System), 5th-floor Uttar Pradesh Power transmission Corporation Ltd., Shakti Bhawan, 14-Ashok Marg, Lucknow-226 001.Ph: 2287879.

14. Chairman & Managing Director, Uttar Pradesh Power transmission Corporation Ltd., Shakti Bhawan, 14-Ashok Marg, Lucknow-226 001.

15. Director (SLDC), VibhutiKhand, Phase-2, Gomti Nagar, Lucknow-226010, Uttar Pradesh

16. Development Commissioner, Power Development Department (J&K),Lottery Building, Behind Civil Secretariat, Srinagar, J&K Pin code: 190009 Fax no. 0194-2452173.

17. Development Commissioner, Power Development Department (J&K), Grid Station Complex, janipur, jammu. 0191-2530265

18. Executive Engineer, SLDC Building, 220kV Gladini Grid Station Complex, NarwalBala, Gladini-180016, J&K.

19. Chief Engineer, UT of Chandigarh (Elecy.

Deptt. 1st Floor), Sector 9-D, Chandigarh-160019.

20. Superintending Engineer (Elect. Op), UT of Chandigarh (Elecy. Deptt. 5th Floor), Sector 9-D, Chandigarh-160019. Ph: 0172-2703242

21. Chairman, Bhakra Beas Management Board, sector-19-B, Madhya Marg, Chandigarh-160019

22. Director(PR), BBMB, SLDC Complex, Industrial Area, Phase-I, Chandigarh-160002

23. CEO, Power links Transmission Ltd. 10th Floor, DLF Tower A, District Centre Jasola, New Delhi -110025.

24. CEO, Jaypee Powergrid Ltd., JA House, 63, Basant Lok, Vasant Vihar, New Delhi-110057.Fax: +91 11 26148890, 26142726

25. Executive Director (NR-1), POWERGRID, B-9, Qutub institutional area, KatwariaSarai,New Delhi-110016

26. Executive Director (NR-2), POWERGRID, Grid Bhawan, Rail Head Complex, Jammu- 180012.

27. Executive Director, NR-3, POWERGRID, 12, Maharana Pratap Marg, Near Sikandar Bag Chauraha, Lucknow-226001


28. Director, Adani Power Ltd, AdaniHouse, Plot No.83, Institutional Area, Sector 32, Gurgaon, Haryana-122001

29. Chairman & Managing Director, Parbati Koldam Transmission Company Ltd., JMD Galleria 5th floor, plot no. 12-D, Sector 48,Sohna road Gurgaon-122001

30. Adani Transmission (I) Ltd, 7-A, Sambhav building, Judges Bungalow Road, Bodakdev, Ahmedabad- 380015

31. General Manager, JAYPEE POWERGRID Limited, JA House, 63, Basant Lok, Vasant Vihar, New Delhi-110057

32. The CEO, POWERGRID KALA AMB TL,400/220 KV GIS Sub Station Vill. Meerpur Kotla, PO. Trilokpu Tehsil. Nahan, Distt. Sirmour 173030,Himachal Pradesh

33. CEO, POWERGRID Unchahar Transmission Ltd. 765/400/220kV Substation, Village Chauferava, Post & Dist Fatehpur, Uttar Pradesh, 212601

34. NRSS XXXVI Transmission Ltd. Essel Infraprojects Ltd.06th Floor, Plot No. 19, Film City, Sec-16 A, Gautam Buddha Nagar, Noida U.P. – 201301

35. NRSS XXXI (B) Transmission Ltd. 503, windsor off CST Road, Kalina, Santacruz (E), Mumbai 400098

36. The DIRECTOR, Patran Transmission Company Limited, 4OO KV 22OkV GIS Substation, Village-Banwala, Tehsil-Patran, District: Patiala 147105, Punjab

37. The Vice President, NRSS XXIX TL, RAPP TL &GPTL. F-1, Mira Corporate Suite, Ishwar Nagar, Mathura Road, New Delhi – 110065

38. Director, Operations , Powerlinks Transmission Ltd., 10th Floor, DLF Tower-A, District Centre, Jasola, New Delhi-110044

39. The Vice President, Gurgaon Palwal Transmission Ltd., F-1, Mira Corporate Suite, Ishwar Nagar, Mathura Road, New Delhi


Distribution List (Eastern Region)

Managing Director, Bihar State Power Transmission Limited, Vidyut Bhawan, Bailey Road, Patna-800021

Chief Engineer (SLDC) Bihar State Power Transmission Limited, Vidyut Bhawan, Bailey Road, Patna-800021

Chief Engineer (SLDC) Damodar Valley Corporation, GOMD-I Premises, P.O.- Danesh Seikh Lane, Howrah- 711109

Chief Engineer (CTC) Damodar Valley Corporation, P.O. Maithon Dam, Dist. Dhanbad, Jharkhand-828207

Chief Engineer, (CRITL) Jharkhand Urja Sancharan Nigam Limited Kusai Colony, Doranda, Ranchi-834002

Electrical Superintending Engineer (CLD) Jharkhand Urja Sancharan Nigam Limited, Kusai Colony, Doranda, Ranchi-834002

Chief General Manager (O&M), OPTCL, Janpath, Bhubaneswar, Odisha – 751 022. FAX: 0674-2542932 [email protected]

Director, WBSETCL Central Testing Laboratory, Abhikshan, Salt Lake, Kolkata-700091 ( Fax no. 2367-3578/1235 )

Chief Load Dispatcher, SLDC OPTCL, P.O. Mancheswar Rly. Colony Bhubaneswar-751017

Chief Engineer (CLD) WBSETCL, P.O. Danesh Sheikh Lane, Andul Road, Howrah-711109

Chief Engineer (Trans.) Power Deptt., Govt. of Sikkim, Gangtok-731010

Executive Director, ER-II Power Grid Corporation of India Ltd., J-I-15, Block-EP, Sector-V,Salt Lake,Kolkata-91

Executive Director ,ER-I Power Grid Corporation of India Ltd., Alankar Place, Boring Road, Patna-800001

General Manager, Powerlinks Transmission Limited Vidyut Nagar, Siliguri WB 734015.

Head- Asset Manament/O&M, Purulia & Kharagpur Transmission Comp. Ltd,634A-Tulip New Minal Residency,J.K Road Near Ayodhya Bypass Road,Bhopal-462023

Sr.Vice President, Teestavalley Power Transmission Ltd.,Vijaya Building, 2nd Floor, 17 Barakhamba Road,New Delhi -110001.

Project Director, Odisha Generation Phase-II Transmission LimitedF-1 Mira Corporate Suites, 1&2 Ishwar Nagar,Okhla Crossing,Mathura Road, New Delhi—110065.

The DGM(Commercial),Power Grid Corporation Of India Ltd.,RHQ, ERTS-II, CF-17, Action Area-1C, New Town, Kolkata 700156,West Bengal.

The General Manager, Darbhanga-Motihari Transmission Company Ltd.,A-26/03,Mohan Cooperative Industrial Estate,Mathura Road,New Delhi



Distribution List ( Southern Region)

1. Chairman cum Managing Director, APTRANSCO, Vidyut Soudha, Gunadala,

Vijayawada 520 004, Andhra Pradesh.

2. Chairman cum Managing Director, TSTRANSCO, Vidyut Soudha, Hyderabad 500 082, Telangana

3. Managing Director, PCKL, KPTCL building, Cauvery Bhavan, Bangalore-560 009, Karnataka

4. Chairman, KSEB, Vaidyuthi Bhavanam, Pattom, Trivandrum 695 004, Kerala

5. Director (Transmission), TANTRANSCO, 144, Anna Salai, Chennai 600 002, Tamil Nadu

6. Chief Engineer, TANTRANSCO, 144, Anna Salai, Guindy Industrial Estate, SIDCO Industrial Estate, Guindy, Chennai, Tamil Nadu 600002

7. Chief Engineer, Vidyut Soudha Building, Khairatabad Rd, Near Eenadu, Khairtabad, Hyderabad, Telangana

8. Chief Engineer, Transmission Corporation of Andhra Pradesh Limited,Vidyut Soudha, Gunadala, Eluru Rd, Vijayawada, Andhra Pradesh

9. Chief Engineer (Transmission- System Operation), North Kalamassery,, HMT Kalamassery, Kochi, Kerala 683104

10. Chief Engineer, 27/1, Race Course Road, Madhava Nagar, Gandhi Nagar, Bengaluru, Karnataka 560001

11. Executive Director,POWERGRID ISTS, Southern Regional Transmission System – II, Near.RTO Driving Test Track, Singanayakanhalli, Yelahanka, Bangalore – 560 064, Karnataka.


12. The Project In Charge,Raichur Sholapur Transmission Company Limited, Patel Estates, S.V.Road, Jogeshwari (West), Mumbai 400 102, Maharashtra

13. The Project In Charge,Kudgi Transmission Ltd., Building No 3, Second Floor, Sudeep Plaza, MLU Sector - 11, Pocket - 4, Dwarka, NEW DELHI – 110 075, Delhi

14. The Project In Charge, Powergrid Vizag Transmission Ltd. Vizag 400kV SS, Sector 10, Ukkanaguram, Vishakapatnam 530 032, Andhra Pradesh

15. The CEO, Powergrid NM Transmission Ltd., SRTS - II, Near RTO Driving Track, Singanayakanahalli, Yelahanka-Doddaballapur Road, Bengaluru 560 064, Karnataka

16. Head-O&M/Assets Management, Maheswaram Transmission Co. Ltd., Tulip-634, New Minal Residency, J.K.Road, Near Ayodhya Bypass, Bhopal 462023, Madhya Pradesh

17. The Chief Executive Officer, POWERGRID Southern Interconnector Transmission System Ltd, 6-6-8/32 & 395 E, Kavadiguda Main Road, Old Praga tools, Secuderabad 500 080, Telangana

*****


Distribution List ( Western Region):

1. Chief Engineer (LD),SLDC Thane - Belapur Rd, MSEB Staff Colony, TTC Industrial Area, Airoli, Navi Mumbai, Maharashtra 400708

2. Gujarat Energy Transmission Corporation Limited,132kV Gotri Sub Station Compound, Near T.B. Hospital, Gotri Road,Vadodara 390021

3. Chief Engineer (LD), MPPTCL, Naya Gaon, Rampur, Jabalpur, Madhya Pradesh 482008 Jabalpur

4. Chief Engineer (LD), CSPTCL, Chhattisgarh State Power Transmission Co. Ltd. Danganiya, Raipur, C.G.

5. Managing Director, MSETCL, Prakashgadh, 5th Floor, Bandra East, Maharashtra Mumbai 400051.

6. Managing Director, GETCO, Sardar Patel Vidyut Bhavan race Course Gujarat Vadodara 390007.

7. Managing Director, MP Power Power Transmission Company Ltd., 3rd Floor, Block No 11, Shakti Bhavan, Rampur, Madhya Pradesh 482008

8. Managing Director, CSPTCL, PO - Sunder Nagar Chhattisgarh Raipur, Dangania 492013.

9. Secretary ( Power), Electricity Department, UT of Daman & Diu, Sachivalaya, Daman & Diu Moti Daman 396210

10. Secretary ( Power), UT of Dadra Nagar & Haveli, Secretariat, Electric Department, 66kv Amli Road, Dadra Nagar & Haveli Silvassa 396230

11. Managing Director, ESSAR STEEL INDIA LIMITED, 27th KM, Surat Hazira Road, Gujarat Surat 394270


12. Chief Electrical Engineer, Goa Electricity Department, Government of Goa, 3rd Floor, Vidyut Bhavan, Panjim, Goa – 403001.

13. General Manager, Power Grid Corporation of India Ltd. Western Region - I Headquarters, PO - Sampritinagar,Nari Ring Road, Nagpur, Maharashtra - 440026

14. Managing Director, Essar Power Transmission Co. Ltd.- 27 Km Surat Hazira Road, Surat Gujarat -394270 India

15. Executive Director, Jindal Power Ltd., OP Jindal STPP, OP Jindal STPS, PO- Tamnar, Chhattisgarh District - Raigarh, 496107

16. Executive Director, Torrent Power Grid Ltd, Torrent House, Off Ashram Road, Gujarat Ahmedabad 380009

17. General Manager, Western Transco Power Limited., 601,6th Floor,Hallmark Business Plaza,Opp Gurunanak Hospital,,Bandra(E), Mumbai-51

18. General Manager, Western Transmission Gujarat Limited., 601,6th Floor,Hallmark Business Plaza,Opp Gurunanak Hospital,,Bandra(E), Mumbai-51

19. General Manager ( Comml), Adani Power Ltd. Achalraj, Opp. Mayor Bungalow, Law Garden, Ahmedabad, Gujarat - 380006

20. Head (Commercial), Bhopal Dhule Transmission Company Ltd., Sterlite Grid Ltd. 634 Tulip, New Minal Presidency, J K Road, Ayodhya Bypass, Madhya Pradesh Bhopal 462023

21. Head (Commercial), Raichur Solapur Power Transmission Company Ltd, Patel Estate, SV Road, Jogeshwari West, Mumbai 400102

22. Head(Commercial), Jabalpur Transmission Company Limited (JTCL)-Sterlite Grid Ltd. 634 Tulip, New Minal Presidency, J K Road, Ayodhya Bypass, Madhya Pradesh Bhopal 462023

23. RAPP Transmission Company, Sterlite Grid Ltd. 634 Tulip, New Minal Presidency, J K Road, Ayodhya Bypass, Madhya Pradesh Bhopal 462023


24. Powergrid Warora Transmission Ltd(PWTL), CEO, Sampriti Nagar, Nari Ring Road, Nagpur, Maharashtra- 440026

25. Chhattisgarh-WR Transmission Limited (CWRTL), General Manager, 8A, Sambhav House, Judges Bunglow Road, Bodakdev Ahmedabad, Gujarat- 380015

26. Powergrid Parli Transmission Ltd, CEO, Sampriti Nagar, Nari Ring Road, Nagpur, Maharashtra- 440026

27. Khargone Transmission Limited, O&M Head Office, A (Tulip) - 634 , Project Director – Asset Management and Grid Planning, New Minal Residency , J.K Road Near Ayodha Bypass Road, Bhopal – 462023

28. Sipat Transmission Limited, 8A, Sambhav House Judges Bunglow Road, Bodakdev Gujarat Ahmedabad – 380015

29. Power Grid-Jabalpur Transmission Ltd. Powergrid Corporation of India Limited, WR-II, Head Quarter, Sama Savli Road, Opp. Ambe School, Gujarat Vadodara 390008

30. Odisha Generation Phase II Transmission Ltd, Power Grid Corporation of India Ltd. Western Region - I Headquarters, PO - Uppalwadi, Sampritinagar, Maharashtra Nagpur 440026

31. Raipur-Rajnandgaon Warora Transmission Ltd, 8A,Sambhav House Judges Bunglow Road,Bodakdev Gujarat Ahmedabad 380015


Distribution List (North-Eastern Region): To:

a. Executive Director,NERTS, Shillong, POWERGRID

b. CGM, SLDC, AEGCL, Near 132 kV Grid Substation, Kahilipara, Guwahati – 781019

c. DGM (MRT), MRT Circle, AEGCL,Narengi, Guwahati, Assam-781026

d. Senior Executive Engineer, SLDC Meghalaya, NEHU Substation, Shillong – 793022

e. Executive Engineer (System Protection), MePTCL, Umiam, Shillong, Meghalaya-793103

f. Director (Projects), NETC, Delhi g. Executive Engineer, SLDC and Transmission Division Itanagar,

Department of Power, Govt. of Arunachal Pradesh, Itanagar- 791111

h. Junior Engineer (Power), DoP, Itanagar, Arunachal Pradesh-791111 i. General Manager I/C (O&M), NEEPCO j. Senior Executive Engineer (SLDC), Tuikhuahtlang, Aizawl,

Mizoram – 796001 k. Executive Engineer (MRT), Power & Electricity Department, Govt.

of Mizoram, Aizawl, Mizoram-796017 l. Executive Engineer (Transmission), DoP Nagaland, SLDC

Nagaland, Electricity Colony, Full Nagarjan, Dimapur, Nagaland – 797112

m. SDO (Testing & Communication), Department of Power, Govt. of Nagaland, Kohima, Nagaland- 797112

n. General Manager (SLDC), Office of MSPCL, Keishampat, Imphal-795001

o. DGM (Substation Division No. 1), MSPCL Keishampat Electricity Complex, Khwai Bazar, Imphal, Manipur -795001

p. DGM (System Operation), SLDC Agartala, TSECL, Tripura (West), Agartala – 799006

q. DGM (Testing & Communication), TSECL, Agartala, Tripura- 799006


Annexure-B.X

S. No.Name of Transmission

Element

Tripping Date and

TimeBrief Reason/Relay Indication

Restoration Date

and Time

Outage

Duration

1 Champa‐Kurushetra pole‐IV 12‐05‐2020 18:10 DMR1 short circuit protection operation 12‐05‐2020 19:09 00:59

2 Champa‐Kurushetra pole‐III 22‐05‐2020 23:47Due to mal‐operation of 286ACX relay, LBB

operated at Kurukshetra end23‐05‐2020 04:16 04:29

3 Champa‐Kurushetra pole‐IV 26‐05‐2020 14:37 HVDC Line Fault 26‐05‐2020 16:35 01:58

4 Champa‐Kurushetra pole‐II 26‐05‐2020 14:37 HVDC Line Fault 26‐05‐2020 16:10 01:33

6* Champa‐Kurushetra pole‐I 28‐05‐2020 14:58 Tripped on DC line fault 28‐05‐2020 16:22 01:24

5* Champa‐Kurushetra pole‐II 28‐05‐2020 14:58 Tripped on DC line fault 28‐05‐2020 16:35 01:37

7* Champa‐Kurushetra pole‐III 28‐05‐2020 14:58 Tripped on DC line fault 28‐05‐2020 17:11 02:13

8* Champa‐Kurushetra pole‐IV 28‐05‐2020 14:58 Tripped on DC line fault 29‐05‐2020 10:36 19:38

9 Champa‐Kurushetra pole‐III 28‐05‐2020 17:46 Tripped on DC line fault 29‐05‐2020 10:56 17:10

10 Champa‐Kurushetra pole‐II 28‐05‐2020 19:53 Transient DC Line fault 28‐05‐2020 21:36 01:43

11 Champa‐Kurushetra pole‐I 28‐05‐2020 19:53 Transient DC Line fault 28‐05‐2020 21:25 01:32

12 Champa‐Kurushetra pole‐IV 31‐05‐2020 19:14 DC line fault 31‐05‐2020 21:56 02:42

13 Champa‐Kurushetra pole‐II 09‐06‐2020 5:00CAT B protection protection due to Earth

overcurrent in Pole 409‐06‐2020 14:37 09:37

14 Champa‐Kurushetra pole‐IV 09‐06‐2020 5:00CAT B protection protection due to Earth

overcurrent in Pole 409‐06‐2020 06:26 01:26

15 Champa‐Kurushetra pole‐IV 09‐06‐2020 07:01 Tripped while charging pole‐1 09‐06‐2020 13:07 06:06

16* Champa‐Kurushetra pole‐I 09‐06‐2020 05:13 Blocked on CLD HV cable operation. 10‐06‐2020 16:29 11:16

17* Champa‐Kurushetra pole‐II 09‐06‐2020 05:00 Blocked on CLD HV cable operation 10‐06‐2020 16:45 11:32

18* Champa‐Kurushetra pole‐III 09‐06‐2020 05:13 Tripped on CNAP protection 10‐06‐2020 14:37 09:08

19* Champa‐Kurushetra pole‐IV 09‐06‐2020 05:00 Tripped on DC under current protection 10‐06‐2020 13:07 08:37

20* Champa‐Kurushetra pole‐I 11‐06‐2020 12:20 DC line fault 11‐06‐2020 16:33 04:13

21* Champa‐Kurushetra pole‐II 11‐06‐2020 12:20 DC line fault 11‐06‐2020 17:03 04:43

22* Champa‐Kurushetra pole‐III 11‐06‐2020 12:20 DC line fault 11‐06‐2020 17:28 05:08

23* Champa‐Kurushetra pole‐IV 11‐06‐2020 12:20 DC line fault 11‐06‐2020 17:51 05:31

24* Champa‐Kurushetra pole‐I 16‐06‐2020 22:03 CNAP Control mal-operation at champa 16‐06‐2020 23:25 01:22

25* Champa‐Kurushetra pole‐II 16‐06‐2020 22:03 VBE major Fault at Kurukshetra 17‐06‐2020 03:36 05:33

26* Champa‐Kurushetra pole‐III 16‐06‐2020 22:03 CNAP Control mal-operation at champa 16‐06‐2020 23:54 01:51

27* Champa‐Kurushetra pole‐IV 16‐06‐2020 22:03 Lane change over failed at Champa 17‐06‐2020 03:06 05:03

Outage Details of HVDC Champa‐Kurukshetra Poles for the month of May‐June

(till 16th Jun 2020)

* Simultaneous Outage of all four poles has been Highlighted.

Annexure I

Annexure-B.XI

प्रचालन मन्वय उप- समसत की 173

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