[ Rishal Asri 091.04.1007

Electrical Engineering]

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THE STUDY OF LOAD FLOW OPTIMIZATION ON 20 kV LINE AT PLN (Persero) YOGYAKARTA RAYON SEDAYU AREA USING ETAP 7.0.0

RISHAL ASRI091.04.1007

ELECTRICAL ENGINEERING DEPARTMENTINDUSTRIAL TECHNOLOGY FACULTY

INSTITUTE OF SCIENCE & TECHNOLOGY OF AKPRIND YOGYAKARTA2013

Outline

Abstract

Preface

The Literature Study

Distribution System of 20 kV at PT.PLN (Persero) Rayon Sedayu

The Discussion

Conclution

Reference

AbstractElectric power system includes the generation, transmission lines, distribution systems, and the load. Distribution system is a main part of electric power systems that directly related with consumer such as industrial level and hospitality as a large consumer and also residential area and household industries as a small consumer. Needed a good planing to get a reliable electricity distribution system. This research will be discussed of load flow optimization studies using ETAP Power Station. This research on 20 kV line at PT. PLN (Persero) Yogyakarta Sedayu Rayon area. Expected for this research will get a reliable and stability electric system.

Keywords: Distribution System 20 kV, ETAP, Rayon Sedayu, Optimization.

Power System Line

Preface

• A power distribution system planning is important to ensure that the growth of electric power can be anticipated with the system development or an addition with technically and economically qualified.

Background

Distribution system is a line that most ranges with overload so that frequent explosions on the transformer distribution due to overload.

The Literature Study

• Distribution system is a main part of electric power systems that directly related to consumer.

• Distribution system divided into primary and secondary distribution.

The Distribution System 20 kV

Distibution system

20 kV three

phase, three

wire with neutral

grounding, high

resistance

Distribution system

20 kV three

phase, three

wire with neutral

grounding , low

resistance

Distribution

system 20 kV three phase, fourth

wire with neutral

grounding directly.

Numerical Computation

• . One of method to solve linier equation that advantage with directly used for calculate load flow analysis

Distribution System 20 kV PT. PLN (Persero) Yogyakarta Rayon Sedayu Area

• Godean sub station have two power transformer 30 MVA. Godean sub station have 6 feeder : GDN 01, GDN 02, GDN 03, GDN 04, GDN 05 dan GDN 06.

Godean Sub Station Topology

pptPlex Live Content

bahan\topologi GI jogja.ppt

Transformer Load

31-03-13 01-04-13 02-04-13 03-04-13 04-04-13 05-04-13 06-04-13 07-04-13 08-04-1302468

101214161820

16.643 16.36 16.839 17.58 17.497 16.416

11.572

6.862

13.161 13.379

19.032

15.18914.037

16.416

Godean 1

Trafo 1 Daya pagi hari P (MW) Trafo 1 Daya malam hari P (MW)

Tanggal

Daya

(MW

)

31-03-13 01-04-13 02-04-13 03-04-13 04-04-13 05-04-13 06-04-13 07-04-13 08-04-130

5

10

15

20

25

18.227 17.567 17.957 19.136 18.9729999999999 17.595

12.115

19.768

13.799 13.912 13.93 14.171 13.948

17.595

Godean 2

Trafo 2 Daya pagi hari P (MW) Trafo 2 Daya malam hari P (MW)

Tanggal

Daya

(MW

)

The Feeder Godean Sub Station 1-5

Standing Operation Procedure

• Important factors that affect the continuity distribution is regulation and operation of distribution system when work and interference network, so that the turning off can be made as small as possible. In addition, fast to transfer the load to the charging source backup and isolate disturbance.

The Discussion

• When transfer of load is load fault condition or over load so the transfer load will be done.

• Transfer of load accordance with Standing Operation Proccedure (SOP).

• To find effect of transfer load so load flow optimization studies will be done.

SOP Substation Godean

pptPlex Live Content

bahan\Slide GI GDN.vsd

Analysis

• Load flow studies used Newton-Rhapson method with ETAP Power Station 7.0.0. version. This method suggested for first using in ETAP Power Station 7.0.0 version program.

0.5 1 1.5 2 2.5 3 3.5 4 4.50

2

4

6

8

10

12

0

9.788

7.544

5.017

9.717 9.646

7.435

4.945

GDN 01

Kondisi Penyulang Normal P(MVA) Kondisi Penyulang Gangguan P(MVA)

BUS

Daya

(MVA

)

0.5 1 1.5 2 2.5 3 3.5 4 4.5012345678

0

3.321

0.574

4.17499999999999

7.52799999999998 7.496

4.0873.314

GDN 03

Kondisi Penyulang Normal P(MVA) Kondisi Penyulang Gangguan P(MVA)

BUS

Daya

(MVA

)

0.5 1 1.5 2 2.5 3 3.5 4 4.50

2

4

6

8

10

0

2.075 1.885

7.84499999999999

8.795 8.696

5.793

3.729

GDN 02

Kondisi Penyulang Normal P(MVA) Kondisi Penyulang Gangguan P(MVA)

BUS

Daya

(MVA

)

0.5 1 1.5 2 2.5 3 3.5 4 4.50

1

2

3

4

5

6

0

2.177 2.331

0.375000000000001

4.776 4.771

2.621

0.362

GDN 05

Kondisi Penyulang Normal P(MVA) Kondisi Penyulang Gangguan P(MVA)

BUS

Daya

(MVA

)

0.5 1 1.5 2 2.5 3 3.5 4 4.5012345678

0

3.782

1.805 1.936

7.179 7.157

3.251

1.555

GDN 04

Kondisi Penyulang Normal P(MVA) Kondisi Penyulang Gangguan P(MVA)

BUS

Daya

(MVA

)

Conclution

Conclution• When the disruption or maintenance on the GDN feeder 01 can be

optimized so that the transfer of load can be overcome. On the feeder GDN 02 and GDN 03 the optimization so less due to of the load transfer bigger than the load transfer in the feeders. On feeders GDN 04 the optimization load flow can be done with transfer of load about ± 50%. On the feeder GDN 05 optimization load flow when the load transfer can be done so that on the 4 bus can be answered with the transfer of load by feeders transfer.

• Load transfer needs to be done if the interruption or maintanance but should pay attention of load flow and the condition of the area being diverted because it can lead to huge losses if the load is transfer does not fit or is not able to overcome by switching of feeders.

Refrention

[1] Amir, Anas (2006) : Studi Perencanaan Jaringan Distribusi Tenaga Listrik Pada PT. PLN (Persero) Area Yogyakarta, Skripsi , Institut Sains dan Teknologi AKPRIND, 22-24

[2] Gonen, Turan. 1987. “Electric Power Distribution System Engineering “, McGraw-Hill Inc: Singapore.

[3] Kadir, Abdul. 1981.” Sistem Distribusi Tenaga Listrik “,Erlangga, PT. Seksama, Jakarta.[4] Kastari, M.Hendra (2006) : Sistem Pengaman Jaringan Distribusi Di PT. PLN

(Persero) APJ Yogyakarta, Tugas Akhir, Institut Sains dan Teknologi AKPRIND,11-16[5] Masruri, (2006) : Evaluasi Profil Tegangan Pada Saluran Distribusi 20 KV di PT. PLN

(Persero) APJ Yogyakarta Dengan Bantuan ETAP 4.0.0, Skripsi, Institut Sains dan Teknologi AKPRIND, 7-8

[6] Pabla. 2002.“Electric Distribution Engineering”. Tata Megraw- Hill: Publishing Company Limited, New Delhi.

[7] Subagyo, Heru, 2008,“Operasi dan Pemeliharaan Sistem Proteksi Penyaluran”, Asosiasi Profesionalis Elektrikal Indonesia (APEI), Surabaya

Any Questions

Thank You WASSALAMU ALAIKUM WR.WB