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LAPORAN INTERIM PRESTASI PERKHIDMATAN

PEMBEKALAN ELEKTRIK DI MALAYSIA

INTERIM REPORT ON THE PERFORMANCE OF THE

ELECTRICITY SUPPLY SERVICES IN MALAYSIA

UNTUK SEPARUH TAHUN PERTAMA 2010

FOR THE FIRST HALF YEAR OF 2010

Laporan Interim Separuh Tahun Pertama 2010 Interim Report for the First Half Year of 2010

Jabatan Kawal Selia Pembekalan dan Pasaran Elektrik Electricity Supply and Market Regulation Department - 2 -

Bil. / No. KANDUNGAN / CONTENTS

1.0 PEMBEKALAN DAN PERMINTAAN BEKALAN ELEKTRIK ELECTRICITY SUPPLY AND DEMAND

1.1 Kehendak Maksimum dan Kapasiti Terpasang

Maximum Demand and Installed Generation Capacity

2.0 JUALAN TENAGA ELEKTRIK SALES OF ELECTRICITY

2.1 Jualan Tenaga Bulanan TNB, SESB, Sarawak Energy Berhad (SEB) dan NUR

Monthly Sales of Energy of TNB, SESB Sarawak Energy Berhad (SEB) and NUR

2.2 Jualan Tenaga Tahunan TNB, SESB, Sarawak Energy Berhad (SEB) dan NUR

Yearly Sales of Energy of TNB, SESB Sarawak Energy Berhad (SEB) and NUR

3.0 KEBOLEHARAPAN (RELIABILITY) BEKALAN ELEKTRIK RELIABILITY OF ELECTRICITY SUPPLY

3.1 Statistik Gangguan Bekalan – TNB

Statistics of Supply Interruptions - TNB

3.2 Statistik Gangguan Bekalan – SESB

Statistics of Supply Interruptions - SESB

3.3 Statistik Gangguan Bekalan – SEB Statistics of Supply Interruptions - SEB

3.4 Statistik Gangguan Bekalan – NUR

Statistics of Supply Interruptions - NUR

3.5 Sistem Pengagihan TNB

Distribution System of TNB

3.5.1 System Average Interruption Duration Index (SAIDI)

3.5.2 System Average Interruption Frequency Index (SAIFI)

3.5.3 Customer Average Interruption Duration Index (CAIDI)

3.6 Sistem Pengagihan SESB

Distribution System of SESB


3.6.2 System Average Interruption Frequency Index (SAIFI)

3.6.3 Customer Average Interruption Duration Index (CAIDI)

3.7 Sistem Pengagihan SEB

Distribution System of SEB




3.8 Sistem Pengagihan NUR

Distribution System of NUR


3.9 Prestasi Sistem Penghantaran di Semenanjung Malaysia

Performance of Transmission System in Peninsular Malaysia

4.0 PUNCA GANGGUAN BEKALAN ELEKTRIK CAUSES OF ELECTRICITY SUPPLY INTERRUPTIONS

4.1 Punca Gangguan Bekalan Elektrik – TNB

Causes of Electricity Supply Interruptions - TNB

4.2 Punca Gangguan Bekalan Elektrik – SESB

Causes of Electricity Supply Interruptions - SESB

4.3 Punca Gangguan Bekalan Elektrik – SEB

Causes of Electricity Supply Interruptions - SEB

4.4 Punca Gangguan Bekalan Elektrik – NUR

Causes of Electricity Supply Interruptions - NUR

5.0 KUALITI BEKALAN POWER QUALITY

5.1 Insiden Voltage Dips – TNB

Incidents of Voltage Dips – TNB

5.2 Insiden Voltage Dips – NUR

Incidents of Voltage Dips - NUR



1.1 KEHENDAK MAKSIMUM DAN KAPASITI PENJANAAN MAXIMUM DEMAND AND INSTALLED GENERATION CAPACITY

Gambarajah 1 : Kehendak Maksimum dan Kapasiti Penjanaan di Semenanjung Malaysia – Separuh Tahun Pertama 2010

Figure 1 : Maximum Demand and Installed Generation Capacity in Peninsular Malaysia for the First Half Year of 2010

21,817 21,817 21,817

14,24514,890 15,072

0

5,000

10,000

15,000

20,000

25,000

1st Quarter 2nd Quarter

(MW)

Installed Generation Capacity Maximum Demand

2 2006

2009

2010 2010

Gambarajah 2 : Kehendak Maksimum dan Kapasiti Penjanaan di Sabah – Separuh Tahun Pertama 2010

Figure 2 : Maximum Demand and Installed Generation Capacity in Sabah for the First Half Year of 2010

903

968# 968

719760 773

0

200

400

600

800

1,000


(MW)


20092010 2010


Nota / Note : # 1) Mulatugas tarbin gas 65 MW bagi kitar terbuka Fasa 1 di Ranhill Powertron Sdn. Bhd. pada Mac 2010 Commissioning of the first phase 65 MW open cycle gas turbine in Ranhill Powertron II Sdn. Bhd. in March 2010.

Sumber / Source : Tenaga Nasional Berhad



Gambarajah 3 : Kehendak Maksimum dan Kapasiti Penjanaan di Sarawak – Separuh Tahun Pertama 2010

Figure 3 : Maximum Demand and Installed Generation Capacity in Sarawak for the First Half Year of 2010

1,230 1,230

1,349

9961,027

1,067

0

200

400

600

800

1,000

1,200

1,400


(MW)


20092010 2010

Gambarajah 4 : Kehendak Maksimum Bulanan NUR Distribution Sdn. Bhd. Figure 4 : Monthly Maximum Demand of NUR Distribution Sdn. Bhd.

91 9195

10199 101 101

106109

111 112 110

103106

109

114 117120

125 124 125

130 130 132131

134137

140 139 138

80

90

100

110

120

130

140

150

Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec

(MW)

Month

2008 2009 2010




2.1 JUALAN TENAGA BULANAN TNB, SESB, SARAWAK ENERGY BERHAD (SEB) DAN NUR MONTHLY SALES OF ELECTRICITY OF TNB, SESB, SARAWAK ENERGY BERHAD (SEB) AND NUR

Gambarajah 5 : Jualan Tenaga Bulanan Oleh TNB (GWj) untuk Separuh Tahun Pertama

2010 Figure 5 : Monthly Sales of Electricity (GWh) of TNB for the First Half Year of 2010

0.00

500.00

1,000.00

1,500.00

2,000.00

2,500.00

3,000.00

3,500.00

Jan Feb Mar Apr May June

1,488 1,4091,558 1,660 1,631 1,643

2,465 2,412 2,3252,649 2,636 2,614

3,353 3,402

2,967

3,501 3,4133,533

5 6 5 6 5 597 81 91 89 88 8422 21 21 24 23 23

En

erg

y S

ale

s (

GW

h)

Month

Domestic Commercial Industrial Mining Public Lighting Agriculture

Gambarajah 6 : Jualan Tenaga Bulanan Oleh SESB (GWj) untuk Separuh Tahun Pertama 2010

Figure 6 : Monthly Sales of Electricity (GWh) of SESB for the First Half Year of 2010

0.00

20.00

40.00

60.00

80.00

100.00

120.00

Jan Feb Mar Apr May June

107

92

103

120110 112

129 121 119 145 139 136

10197

89

104 99 98

3 5 4 4 4 4

En

erg

y S

ale

s (

GW

h)

Month

Domestic Commercial Industrial Public Lighting




Gambarajah 7 : Jualan Tenaga Sarawak Energy Berhad (GWj) untuk Separuh Tahun Pertama 2010

Figure 7 : Sales of Electricity (GWh) by Sarawak Energy Berhad for the First Half Year of 2010

0

200

400

600

800

1000

1200


625

1080 1085

38

Ener

gy S

ales

(GW

h)

Category of Consumers

Gambarajah 8 : Jualan Tenaga Bulanan NUR Distribution Sdn. Bhd. (GWj) untuk Separuh Tahun Pertama 2010

Figure 8 : Monthly Sales of Electricity (GWh) of Nur Distribution Sdn. Bhd. For the First Half Year of 2010

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

100.0

Jan Feb Mac Apr Mei Jun

0.45 0.57 0.51 0.52 0.51 0.632.53 2.38 2.89 2.87 2.75 2.70

84.5278.10

89.32 88.49 91.25 87.50

0.12 0.11 0.13 0.13 0.11 0.11

En

erg

y S

ales

(G

Wh)

Month





2.2 JUALAN TENAGA TAHUNAN TNB, SESB, SEB DAN NUR YEARLY SALES OF ELECTRICITY OF TNB, SESB, SEB AND N UR

Gambarajah 9 : Jumlah Jualan Tenaga (GWj) oleh TNB untuk : i) Separuh Tahun Pertama 2008, 2009 dan

2010 ii) Sepanjang Tahun 2006 Hingga 2009

Figure 9 : The Total Electricity (GWh) of TNB for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

0

5000

10000

15000

20000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

14366 15,351 16,01717,124

7,933 8,408 9,389

(GWh)

Year

Domestic

0

10000

20000

30000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

23859 25,83727,190 28,287

13,438 13,75315,101(GWh)

Year

Commercial

0

10000

20000

30000

40000

50000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

37835 39,046 40,07236,608

20,258 16,956 20,168

(GWh)

Year

Industrial

0

20

40

60

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

38 33 35

53

1725

32(GWh)

Year

Mining

0

500

1000

1500

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

854 908 9541,093

475 486 531

(GWh)

Year

Public Lighting

0

50

100

150

200

250

2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

186

225 245

109 117 134(GWh)

Year

Agriculture

0

20,000

40,000

60,000

80,000

100,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

77,00881,360 84,493 83,411

42,230 39,746 45,355

(GWh)

Year

Total




Gambarajah 10 : Jumlah Jualan Tenaga (GWj) oleh SESB untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 10 : The Total Electricity (GWh) of SESB for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

0

500

1000

1500

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

937 1,035 1,090 1,204

443 584 644

(GWh)

Year

Domestic

0

500

1000

1500

2000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

1,103 1,238 1,321

1,504

535 727 789

(GWh)

Year

Commercial

0

500

1000

1500

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

889 993 1,017

1,099

415 526 588

(GWh)

Year

Industrial

0

10

20

30

40

50

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

3945 47 49

2024 25

(GWh)

Year

Public Lighting

0

1,000

2,000

3,000

4,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

2,9683,312 3,474

3,856

1,626 1,860 2,045

(GWh)

Year

Total




Gambarajah 11 : Jumlah Jualan Tenaga (GWj) oleh SEB untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 11 : The Total Electricity (GWh) of SEB for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

0

500

1000

1500

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

1,040 1,098 1,132 1,249

554 597 625

(GWh)

Year

Domestic

0

500

1000

1500

2000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

1,324 1,421 1,497 1,623

734 780 1,080

(GWh)

Year

Commercial

0

500

1000

1500

2000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

1,627 1,691 1,726 1,606

880 785 1,085

(GWh)

Year

Industrial

0

20

40

60

80

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

54 62 66 62

34 36 38

(GWh)

Year

Public Lighting

0

1,000

2,000

3,000

4,000

5,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

4,045 4,272 4,421 4,540

2,087 2,1982,828

(GWh)

Year

Total

2.0 JUALAN TENAGA ELEKTRIK SALES OF ELEC TRICITY



Gambarajah 12 : Jumlah Jualan Tenaga (GWj) oleh NUR Distribution Sdn. Bhd. untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 12 : The Total Electricity (GWh) of NUR Distribution Sdn. Bhd. for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

0.0

2.0

4.0

6.0

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

4.14.6 5.2 5.5

2.6 2.73.2

(GWh)

Year

Domestic

0.0

5.0

10.0

15.0

20.0

25.0

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

24.020.3

21.8 23.5

11.4 11.3

16.1(GWh)

Year

Commercial

0.0

200.0

400.0

600.0

800.0

1000.0

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

525.1 590.9

763.8916.1

351.6420.4

519.2

(GWh)

Year

Industrial

0.0

0.5

1.0

1.5

2.0

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

1.8 1.7 1.7 1.6

0.9 0.8 0.7

(GWh)

Year

Public Lighting

0.0

200.0

400.0

600.0

800.0

1000.0

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

555.0 617.6

792.5946.8

301.2

435.3539.2

(GWh)

Year

Total




3.1 STATISTIK GANGGUAN BEKALAN – TNB STATISTICS OF SUPPLY INTERRUPTIONS - TNB

Gambarajah 13 : Bilangan Gangguan Bekalan Elektrik di Semenanjung Malaysia untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 13 : Numbers of Electricity Supply Interruptions in Peninsular Malaysia for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

020,00040,00060,00080,000

100,000120,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

55,52374,058

112,064 108,708

48,298 56,773 49,800

Num

ber

Year

Unscheduled Interruptions in Peninsular Malaysia

01,0002,0003,0004,0005,0006,0007,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

1,0912,348

5,3306,262

1,364

3,706 3,099

Nu

mb

er

Year

Scheduled Interruptions in Peninsular Malaysia

020,00040,00060,00080,000

100,000120,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

56,61476,406#

117,394 114,971

49,662 60,479 52,899

Nu

mb

er

Year

Total Interruptions in Peninsular Malaysia


Nota / Note : # Mulai September 2007,

TNB menggunapakai sistem pemantauan dan pelaporan prestasi sistem pembekalan dengan menggunakan software baru iaitu TOMS (Total Outage Management System).

From September 2007,

application of new monitoring and reporting system on performance of supply system using the new software, i.e. Total Outage Management System (TOMS).



Gambarajah 14 : Purata Bilangan Gangguan Bekalan Elektrik Bulanan di Semenanjung Malaysia : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 14 : Monthly Average of Electricity Supply Interruptions in Peninsular Malaysia for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

0

2,000

4,000

6,000

8,000

10,000

12,000

4,718

6,367

9,783 9,581

8,277

10,0808,817

Num

ber

Year

Gambarajah 15 : Jumlah Kumulatif Bilangan Gangguan Bekalan Elektrik bagi Negeri-negeri di Semenanjung Malaysia untuk Separuh Tahun Pertama 2008, 2009 dan 2010

Figure 15 : Total Number of Supply Interruptions in Various States in Peninsular Malaysia for the First Half Year of 2008, 2009 and 2010

0

2000

4000

6000

8000

10000

12000

841

4,182

5,197

3,677

7,367

6,411

4

2,759

1,326

8,537

2,454

1,333

5,574

1,067

5,407

4,609

5,987

8,410

6,738

4

3,278

2,464

10,05

2

3,376

2,013

7,074

414

4,226

3,806

6,164

7,783

6,414

11

3,296

1,952

9,144

2,829

2,014

4,846

Numb

er

State

2008 (Jan-June) 2009 (Jan-June) 2010 (Jan-June)




Gambarajah 16 : (a) Peratusan Bilangan Gangguan Bekalan Elektrik Keseluruhan Mengikut Bahagian Terlibat di Semenanjung Malaysia untuk : i) Separuh Tahun Pertama 2009 dan 2010 ii) Sepanjang Tahun 2008 dan 2009

Figure 16 : (a) Percentages of Total Number of Supply Interruptions in Peninsular Malaysia Based on the Component of Network for : i) First Half Year of 2009 and 2010 ii) In the Year 2008 and 2009

10.2% 10.6% 9.9% 11.5%

21.8% 19.3% 20.1% 22.5%

68.0% 70.0% 70.0% 66.0%

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

2008 2009 2009 (Jan-June) 2010 (Jan-June)

(%)

Underground Cable Substation Overhead Line

(b) Peratusan Tahun 2009 (Jan-Jun)

Percentages in 2009 (Jan-June)

Underground Cable9.87%

Substation20.06%

Overhead Line

70.07%

(c) Peratusan Tahun 2010 (Jan-Jun) Percentages in 2010 (Jan-June)

Underground Cable

11.55%

Substation22.47%

Overhead Line

65.98%

Nota / Note : Tidak termasuk gangguan bekalan voltan tinggi Excluding high voltage supply interruptions




3.2 STATISTIK GANGGUAN BEKALAN - SESB STATISTICS OF SUPPLY INTERRUPTIONS - SESB

Gambarajah 17 : Bilangan Gangguan Bekalan Elektrik di Negeri Sabah untuk : i) Separuh Tahun Pertama 2008, 2009 dan 2010 ii) Sepanjang Tahun 2006 Hingga 2009

Figure 17 : Numbers of Electricity Supply Interruptions in Sabah for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

05,000

10,00015,00020,00025,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

22,436 20,006 19,484 18,227

9,901 8,841 9,203

Num

ber

Year

Unscheduled Interruptions in Sabah

01,0002,0003,0004,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

3,321 3,583

2,4273,550

1,1231,711 1,773

Num

ber

Year

Scheduled Interruptions in Sabah

05,000

10,00015,00020,00025,00030,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

25,757 23,589 21,911 21,77711,024 10,552 10,976

Num

ber

Year

Total Interruptions in Sabah

Nota : Tidak termasuk gangguan pada sistem penghantaran dan penjanaan Note : Excluding interruptions in transmission and generation system




Gambarajah 18 : Purata Bilangan Gangguan Bekalan Elektrik Bulanan di Negeri Sabah untuk : i) Separuh Tahun Pertama 2008, 2009 dan 2010 ii) Sepanjang Tahun 2006 Hingga 2009

Figure 18 : Monthly Average of Electricity Supply Interruptions in Sabah for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

0

500

1,000

1,500

2,000

2,500 2,146 1,966 1,826 1,815 1,837

1,759 1,829

Num

ber

Year




3.3 STATISTIK GANGGUAN BEKALAN – SEB STATISTICS OF SUPPLY INTERRUPTIONS - SEB

Gambarajah 19 : Bilangan Gangguan Bekalan Elektrik di Negeri Sarawak untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 19 : Numbers of Electricity Supply Interruptions in Sarawak for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

0

2,000

4,000

6,000

8,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

6,279 6,489 6,301 6,040

3,153 2,887 3,313

Nu

mb

er

Year

Unscheduled Interruptions in Sarawak

0

500

1,000

1,500

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

1,130 1,426 1,816 1,828

940 891 789

Nu

mb

er

Year

Scheduled Interruptions in Sarawak

02,0004,0006,0008,000

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

7,4097,915 8,117 7,868

4,093 3,778 4,102

Nu

mb

er

Year

Total Interruptions in Sarawak




Gambarajah 20 : Purata Bilangan Gangguan Bekalan Elektrik Bulanan di Negeri Sarawak untuk : i) Separuh Tahun Pertama 2008, 2009 dan 2010 ii) Sepanjang Tahun 2006 Hingga 2009

Figure 20 : Monthly Average of Electricity Supply Interruptions in Sarawak for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

600

610

620

630

640

650

660

670

680

690

660

676

656

682

630

684

Num

ber

Year

`




3.4 STATISTIK GANGGUAN BEKALAN – NUR STATISTICS OF SUPPLY INTERRUPTIONS - NUR

Gambarajah 21 : Bilangan Gangguan Bekalan Elektrik di Kulim Hi-Tech Park (KHTP) yang dilaporkan oleh NUR Distribution Sdn. Bhd. untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 21 : Numbers of Electricity Supply Interruptions in Kulim Hi-Tech Park (KHTP) by NUR Distribution Sdn. Bhd. for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

0

20

40

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

3240

3530

1912

22

Num

ber

Year

Unscheduled Interruptions of NUR Distribution Sdn. Bhd.

0

50

100

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

5165

5670

21 27 30

Num

ber

Year

Scheduled Interruptions of NUR Distribution Sdn. Bh d.

0

50

100

150

2006 2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

83105 91 100

40 39 52

Num

ber

Year

Total Interruptions of NUR Distribution Sdn. Bhd.




Gambarajah 22 : Purata Bilangan Gangguan Bekalan Elektrik Bulanan di Kulim Hi-Tech Park (KHTP) yang dilaporkan oleh NUR Distribution Sdn. Bhd. untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 22 : Monthly Average of Electricity Supply Interruptions in Kulim Hi-Tech Park (KHTP) Reported by NUR Distribution Sdn. Bhd. for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2006 to 2009

0

2

4

6

8

10

7

98

87 7

9

Num

ber

Year




3.5 SISTEM PENGAGIHAN TNB DISTRIBUTION SYSTEM OF TNB

3.5.1 SYSTEM AVERAGE INTERRUPTION DURATION INDEX (SAIDI)

Jadual 1 : SAIDI (Minit/Pelanggan/Tahun) bagi Negeri-Negeri di Semenanjung Malaysia untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Table 1 : SAIDI (Minutes/Customer/Year) for the Various States in Peninsular Malaysia for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2007 to 2009

Tahun Year

Indek SAIDI Keseluruhan Overall SAIDI

(Minutes)

Negeri Paling Tinggi Indeks SAIDI

State with Highest SAIDI

Negeri Paling Rendah Indeks SAIDI

State with Lowest SAIDI

2007 75.7 Pahang (108.4) WP Putrajaya/Cyberjaya (2.1) 2008 87.3 Johor (120.5) WP Putrajaya/Cyberjaya (6.6) 2009 66.1 P.Pinang (111.3) WP Putrajaya/Cyberjaya (0.2)

2008 (Jan-Jun) 37.5 Melaka (51.8) WP Putrajaya/Cyberjaya (5.9) 2009 (Jan-Jun) 33.9 Kelantan (52.8) WP Putrajaya/Cyberjaya (0.19) 2010 (Jan-Jun) 49.1 Perak (99.8) WP Putrajaya/Cyberjaya (7.8)

Gambarajah 23 : SAIDI (Minit/Pelanggan/Tahun) di Semenanjung Malaysia untuk Separuh Tahun

Pertama 2010 Figure 23 : SAIDI (Minutes/Customer/Year) in Peninsular Malaysia for the First Half Year of 2010

0.00

20.00

40.00

60.00

80.00

100.00 87.3

66.1

37.534.0

49.1#

7.0 8.3 8.7 8.7 8.6 7.8

32.8&

6.5 5.8 5.4 5.1 5.1 5.1

SAIDI

Nota / Notes : # - Mulai Januari 2010, TNB telah mengambil langkah untuk mempertingkatkan sistem pelaporan SAIDI

yang lebih tepat dengan menggabungkan perisian-perisian TOMS, eCIBS dan ERMS. Perisian baru ini dipanggil Enhanced TOMS.

From January 2010, TNB has taken steps to improve on the data collection and recording, with the integration of TOMS, eCIBS and ERMS into a new system called Enhanced TOMS.

& - SAIDI dikira menggunakan perisian lama (TOMS). SAIDI calculated using old software namely TOMS.




Gambarajah 24 : SAIDI (Minit/Pelanggan/Tahun) Terkumpul bagi Negeri-Negeri di Semenanjung

Malaysia untuk Separuh Tahun Pertama 2008, 2009 dan 2010 Figure 24 : SAIDI (Minutes/Customer/Year) for the Various States in Peninsular Malaysia for the

First Half Year of 2008, 2009 and 2010

Perlis Kedah P. Pinang Perak Selangor Kuala LumpurWP Putrajaya/

CyberjayaN. Sembilan Melaka Johor Pahang Terengganu Kelantan

Peninsular Malaysia

2008(Jan-June) 27.9 37.3 37.5 28.3 31.9 26.0 5.9 34.9 51.8 49.2 35.4 26.0 39.3 37.5

2009(Jan-June) 26.3 43.1 46.3 31.4 28.2 24.4 0.2 39.6 26.7 39.4 33.9 21.3 52.8 34.0

2010(Jan-June) 24.2 73.1 59.9 99.8 39.9 24.8 7.8 40.1 36.8 50.4 35.3 32.7 44.1 49.1

0.0

20.0

40.0

60.0

80.0

100.0

SAIDI




3.5.2 SYSTEM AVERAGE INTERRUPTION FREQUENCY INDEX (SAIFI)

Gambarajah 25 : SAIFI (Bil. Gangguan/Pelanggan/Tahun) di Semenanjung Malaysia untuk Separuh Tahun Pertama 2010

Figure 25 : SAIFI (No. of Interruption/Customer/Year) in Peninsular Malaysia for the First Half Year of 2010

0.00

0.20

0.40

0.60

0.80

1.00 0.87

0.76

0.38 0.39

0.63

0.070.10 0.12 0.13 0.11 0.10

SAIFI

Nota / Note : SAIFI pada tahun 2010 dikira menggunakan perisian baru (Enhanced TOMS) SAIFI in 2010 is calculated using new software namely Enhanced TOMS

Gambarajah 25 : SAIFI (Bil. Gangguan/Pelanggan/Tahun) Terkumpul bagi Negeri-Negeri di Semenanjung Malaysia untuk Separuh Tahun Pertama 2008, 2009 dan 2010

Figure 25 : SAIFI (No. of Interruption/Customer/Year) for the Various States in Peninsular Malaysia for the First Half Year of 2008, 2009 and 2010

Perlis Kedah P. Pinang Perak SelangorWP Kuala Lumpur

WP Putrajaya/ Cyberjaya

N. Sembilan Melaka Johor Pahang Terengganu KelantanPeninsular Malaysia

2008(Jan-June) 0.36 0.37 0.57 0.49 0.32 0.21 0.02 0.30 0.45 0.40 0.36 0.44 0.45 0.38

2009(Jan-June) 0.29 0.48 0.67 0.44 0.28 0.27 0.000 0.33 0.43 0.34 0.36 0.44 0.73 0.39

2010(Jan-June) 0.03 0.97 0.74 1.21 0.44 0.26 0.04 0.42 0.40 0.66 0.41 0.69 0.87 0.63

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

SAIFI




3.5.3 CUSTOMER AVERAGE INTERRUPTION DURATION INDEX (CAIDI)

Gambarajah 27 : CAIDI (Minit/Pelanggan Terlibat/Tahun) di Semenanjung Malaysia untuk Separuh Tahun Pertama 2010

Figure 27 : CAIDI (Minutes/Interrupted Customer/Year) in Peninsular Malaysia for the First Half Year of 2010

0.00

20.00

40.00

60.00

80.00

100.00

120.00100.7

86.8

97.1

87.1

77.9

99.6

82.8

72.767.2

78.3 77.5

CAIDI

Gambarajah 28 : CAIDI (Minit/Pelanggan Terlibat/Tahun) Terkumpul bagi Negeri-Negeri di Semenanjung Malaysia untuk Separuh Tahun Pertama 2008, 2009 dan 2010

Figure 28 : CAIDI (Minutes/Interrupted Customer/Year) for the Various States in Peninsular Malaysia for the First Half Year of 2008, 2009 and 2010

Perlis Kedah P. Pinang Perak SelangorWP Kuala Lumpur

WP Putrajaya/ Cyberjaya

N. Sembilan Melaka Johor Pahang Terengganu KelantanPeninsular Malaysia

2008(Jan-June) 78.51 101.47 66.09 57.54 99.96 122.45 381.26 115.02 116.07 121.68 97.07 59.14 86.79 97.08

2009(Jan-June) 91.5 90.15 69.42 71.36 102.71 89.41 94 121.31 61.50 114.66 95.32 48.83 72.64 87.07

2010(Jan-June) 78.99 75.62 81.01 82.40 90.70 95.80 205.23 94.73 91.37 76.73 86.78 47.63 50.75 77.87

0.0

50.0

100.0

150.0

200.0

250.0

300.0

350.0

400.0

CAIDI (in Minutes)


Supply interruptions on 14 May 2008 caused by third parties works (damage to cables).



3.6 SISTEM PENGAGIHAN SESB DISTRIBUTION SYSTEM OF SESB

3.6.1 SYSTEM AVERAGE INTERRUPTION DURATION INDEX (SAIDI) Gambarajah 29 : SAIDI (Minit/Pelanggan/Tahun) di Negeri Sabah untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 29 : SAIDI (Minutes/Customer/Year) in Sabah for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2007 to 2009

0

500

1000

1500

2000

2500

3000

2007 2008 2009 2008

(Jan-June)

2009

(Jan-June)

2010

(Jan-June)

1,379

1,078

739 580

423 271

607 778

2,129

421

709

243

1,987 1,856

2,868

1,001 1,132

513

SAIDI

Year

Distribution Transmission & Generation Total SAIDI




3.6.2 SYSTEM AVERAGE INTERRUPTION FREQUENCY INDEX (SAIFI) Gambarajah 30 : SAIFI (Bil. Gangguan/Pelanggan/Tahun) di Negeri Sabah untuk : i) Separuh Tahun Pertama 2008,2 009 dan


Figure 30 : SAIFI (No’s of Interruption/Customer/Year) in Sabah for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2007 to 2009

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

2007 2008 2009 2008

(Jan-June)

2009

(Jan-June)

2010

(Jan-June)

23.9

20.1

16.9

10.39.0 8.38.5 8.3

19.1

4.66.6

3.1

32.3

28.4

36.0

14.9 15.6

11.4

SAIFI

Year

Distribution Transmission & Generation Total SAIFI




3.6.3 CUSTOMER AVERAGE INTERRUPTION DURATION INDEX (CAIDI)

Gambarajah 31 : CAIDI (Minit/Pelanggan Terlibat/Tahun) bagi Negeri Sabah untuk : i) Separuh Tahun Pertama 2008, 2009 dan 2010 ii) Sepanjang Tahun 2007 Hingga 2009

Figure 31 : CAIDI (Minutes/Interrupted Customer/Year) in Sabah for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2007 to 2009

0.00

20.00

40.00

60.00

80.00

100.00

120.00

2007 2008 2009 2008

(Jan-June)

2009

(Jan-June)

2010

(Jan-June)

57.853.5

43.6

56.6

47.0

32.8

71.9

94.3

111.4

91.0

107.9

78.2

61.565.4

79.6

67.372.7

45.2

CAIDI

(in Minutes)

Year

Distribution Transmission & Generation Total CAIDI




3.7 SISTEM PENGAGIHAN SEB DISTRIBUTION SYSTEM OF SEB

3.7.1 SYSTEM AVERAGE INTERRUPTION DURATION INDEX (SAIDI) Gambarajah 32 : SAIDI (Minit/Pelanggan/Tahun) SEB untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 32 : SAIDI (Minutes/Customer/Year) of SEB for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2007 to 2009

0

50

100

150

200

250

300350

303273

216

139117 99

SAIDI

Year




3.8 SISTEM PENGAGIHAN NUR DISTRIBUTION SYSTEM OF NUR

3.8.1 SYSTEM AVERAGE INTERRUPTION DURATION INDEX (SAIDI) Gambarajah 33 : SAIDI Keseluruhan dan Industri (Untuk Pengguna Voltan Tinggi) di Kulim Hi-Tech Park (KHTP) yang dilaporkan oleh NUR Distribution Sdn. Bhd. untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 33 : Total SAIDI and Industrial SAIDI (for High Voltage Customers only) in Kulim Hi-Tech Park (KHTP) Reported by NUR Distribution Sdn. Bhd. for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2007 to 2009

0

20

40

60

80

100

120

140

2006 2007 2008 2009 2010 (Jun)

125

49

2.50 2.82 6.081.091 2.889

0 0.154 0

SAIDI

Year

Overall SAIDI Industrial SAIDI

SAIDI was high because there were two faults on 11 kV cables, each affecting

number of customers. One of these faults was caused by a third party digging up

the cable.

There were two faults on 11 kV cables.




3.9 PRESTASI SISTEM PENGHANTARAN DI SEMENANJUNG MALAYSIA PERFORMANCE OF TRANSMISSION SYSTEM IN PENINSULAR MALAYSIA

Jadual 2 : Statistik Pelantikan Sistem Penghantaran dengan Kehilangan Beban 50 MW Ke Atas untuk Separuh Tahun Pertama 2009

Table 2 : Statistics of Transmission System Tripping with a Load Loss of 50 MW and Above for the First Half Year of 2010

Perkara / Indicators Jan Feb Mar Apr May June

Bilangan Pelantikan No. of Tripping without Load Shedding

0 1 0 0 0 1

Bilangan Lucutan Beban

No. of Tripping with Load Shedding 0 0 0 0 0 0

Kehilangan Beban Maksimum (MW)

Maximum Load Loss (MW) 56 61.5

Tenaga Yang Tidak Dibekalkan Semasa Pelantikan (MWj)

Unsupplied Energy due to Tripping (MWh) 112.1 57.3

Purata Tenaga Tidak Dibekalkan Setiap Pelantikan (MWj)

Average Unsupplied Energy per Trip (MWh)

112.1 57.3

Purata Tempoh Setiap Pelantikan (Jam:Minit)

Average Duration per Trip (Hour) 2:00 0:56

Tenaga Tidak Dibekalkan Semasa Lucutan Beban (MWj) Unsupplied Energy During Load Shedding (MWh)

0 0 0 0 0 0




Gambarajah 34 : Bilangan Pelantikan Sistem Penghantaran di Semenanjung Malaysia dengan Kehilangan Beban 50 MW ke Atas untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 34 : Number of Transmission System Tripping in Peninsular Malaysia with a Load Loss of 50 MW and Above for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2007 to 2009

0

1

2

3

4

5

6

7

8

9

2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

9

6

2

4

0

2

10 0 0 0 0

No. o

f Inc

iden

ts

Year

No. of Tripping without Load Shedding

No. of Tripping with Load Shedding




4.1 PUNCA GANGGUAN BEKALAN ELEKTRIK – TNB CAUSES OF ELECTRICITY SUPPLY INTERRUPTIONS - TNB

Gambarajah 35 : Punca-Punca Gangguan Bekalan Elektrik Tidak Berjadual di

Semenanjung Malaysia Figure 35 : Causes of Unscheduled Electricity Supply Interruptions in Peninsular

Malaysia

2010 (Jan-June)

Natural disasters*

0.10%

Equipment Failures2.05% Damaged by

Third Parties13.50%

Process and Quality of

Work#56.70%

Unknown15.50%

Trees10.00%

Others##2.15%

Total of Interruptions = 49,800

(2007-2009)

Natural disasters* 12.79%

Equipment Failures2.22%

Damaged by Third Parties

13.59%

Process and Quality of

Work#44.80%

Unknown13.63%

Trees7.69%

Others##5.28%



Nota : * (angin, ribut, banjir, tanah runtuh dan lain-lain); ## (Pepasangan kena langgar, kecacatan rekabentuk, kerosakan geganti, transient overload, shorting, pencerobohan/perbuatan khianat) # (sambungan tidak baik, mutu kerja, beban lampau dan senggaraan)

Notes : * (wind, storm, flood, land slides and etc.); ## (ageing of insulation, design defect, relay malfunction, transient overload, encroachment/vandalism, maloperation of protection) # (loose contact, quality of work, overloading and maintenance)



4.2 PUNCA GANGGUAN BEKALAN ELEKTRIK – SESB CAUSES OF ELECTRICITY SUPPLY INTERRUPTIONS - SESB

Gambarajah 36 : Punca-Punca Gangguan Bekalan Elektrik Tidak Berjadual di

Negeri Sabah Figure 36 : Causes of Unscheduled Electricity Supply Interruptions in Sabah

2010 (Jan-June)

Natural Disasters*

8.6%

Overload7.6%

Third Party Damage10.8%

Trees15.9%

Installation Fault/Damage

37.2%

Others/No Data Key in/Shut

Down10.3%

Unknown8.4%

Transient1.2%


(2007 – 2009)

Natural Disasters*10.8%

Overload7.5%


Trees15.8%

Installation Fault/Damage

22.6%

Others/No Data Key in/Shut Down

7.9%

Unknown19.3%

Transient3.1%


Nota : * (angin, ribut, banjir, tanah runtuh dan lain-lain)

Note : * (wind, storm, flood, land slides and etc.)

4.0 PUNCA GANGGUAN BEKALAN ELEKTRIK CAUSES OF ELECTRICITY SUPPLY INTER RUPTIONS



4.3 PUNCA GANGGUAN BEKALAN ELEKTRIK – SEB CAUSES OF ELECTRICITY SUPPLY INTERRUPTIONS - SEB

Gambarajah 37 : Punca-Punca Gangguan Bekalan Elektrik Tidak Berjadual SEB

Figure 37 : Causes of Unscheduled Electricity Supply Interruptions of SEB

2010 (Jan-June)

Natural Disasters* 2.7%

Overload10.2%

Incorrect Operation /

Settings0.2%



Transient47.2%

Others8.6%


(2007 – 2009)


Overload5.5%

Incorrect Operation / Settings

0.2%



Transient42.5%

Others12.2%

Total Interruptions = 18,830


Note : * (wind, storm, flood, land slides and etc.)




4.4 PUNCA GANGGUAN BEKALAN ELEKTRIK – NUR CAUSES OF ELECTRICITY SUPPLY INTERRUPTION - NUR

Gambarajah 38 : Punca-Punca Gangguan Bekalan Elektrik Tidak Berjadual NUR

Distribution Figure 38 : Causes of Unscheduled Electricity Supply Interruptions of NUR

Distribution

2010 (Jan-June)

Equipment Failure22.7%

Overload31.8%

Inferior Workmanship

31.8%


Total Interruptions = 22

(2007-2009)


Equipment Failure31.4%

Overload13.3%

Incorrect Operation/Settings1.87%

Inferior Workmanship

28.6%

Third Party Damage19.0% Others

1.0%

Total Interruptions = 105


Note : * (wind, storm. Flood, land slides and etc.)




5.1 INSIDEN VOLTAGE DIPS – TNB INCIDENTS OF VOLTAGE DIPS - TNB

Gambarajah 39 : Bilangan Insiden Voltage Dips yang dilaporkan di Kawasan-Kawasan Perindustrian Utama di Semenanjung Malaysia untuk Separuh Tahun Pertama 2008, 2009 dan

2010 Figure 39 : Number of Voltage Dips Incidents Reported in Major Industrial Estates in Peninsular

Malaysia for the First Half Year of 2008, 2009 and 2010

5

0 05

10 0

3

14

0

5

16

24

73

6

0 02

0 0 0

17

11

0 2

75

50

10 0 0 0 1

3

9 9

04

11

18

56

0

20

40

60

80

No

. o

f I

ncid

en

ts

Industrial Areas

2008 (Jan-Jun) 2009 (Jan-Jun) 2010 (Jan-Jun)

5.0 KUALITI BEKALAN (POWER QUALITY)



Gambarajah 40 : Bilangan Pengguna Terlibat dalam Insiden Voltage Dips untuk Separuh Tahun Pertama 2008, 2009 dan 2010

Figure 40 : Number of Customers in the Major Industrial Estates Affected by Voltage Dips for the First Half Year of 2008, 2009 and 2010

60 0

81 0 0 3

22

08

30

70

148

70 0 2 0 0 0

2216

0 27 10

66

1 0 0 0 0 1 3

13 16

0 4

16

38

92

0

20

40

60

80

100

120

140

160

To

ta

l C

usto

me

rs A

ffe

cte

d

Industrial Areas

2008 (Jan-Jun) 2009 (Jan-Jun) 2010 (Jan-Jun)




5.3 INSIDEN VOLTAGE DIPS – KULIM HI-TECH PARK (KHTP) INCIDENTS OF VOLTAGE DIPS – KULIM HI-TECH PARK (KH TP)

Gambarajah 41 : Bilangan Insiden Voltage Dips di KHTP yang dilaporkan oleh NUR Distribution

Sdn. Bhd. Untuk Separuh Tahun Pertama 2008 Hingga 2010 Figure 41 : Number of Voltage Dips in Kulim Hi-Tech park Reported by NUR Distribution Sdn.

Bhd. For the First Half Year of 2008 to 2010

0

2

4

6

8

10

12

14

16

Jan Feb Mar Apr May Jun Total Incidents

(Jan-June)

4

1

3

12

4

15

1

3 3

0

45

16

3

01

0

1

4

9

No.

of I

ncid

ents

Rep

orte

d

Month





Gambarajah 42 : Bilangan Pengguna Terlibat Dalam Insiden Voltage Dips di KHTP Untuk Separuh Tahun Pertama 2008 Hingga 2010

Figure 42 : Number of Customers in Kulim Hi-Tech Park Affected by Voltage Dips For the First Half Year of 2008 to 2010

0

2

4

6

8

10

12

14

16

18

Jan Feb Mar Apr May Jun Total Customers

Affected (Jan-June)

2

0 0 0

12

3

17

0 0

18

0 0 0

18

12

0 0 0 0

2

14

No

. of C

ust

om

ers

Aff

ecte

d

Rep

ort

ed

Month





Gambarajah 43 : Insiden Voltage Dips yang dilaporkan Menjejaskan Bekalan Kepada Pengguna di KHTP untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 43 : Incidents of Voltage Dips Affecting Consumers in KHTP for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2007 to 2009

0

10

20

30

40

2007 2008 2009 2008 (Jan-June) 2009 (Jan-June) 2010 (Jan-June)

1 1 2 0 0 1

26 2629

15 168

No.

of I

ncid

ents

Year

External (Originated from TNB's Transmission System)

Internal (Originated from NUR's Distribution System)

Gambarajah 44 : Pecahan Bilangan Insiden Voltage Dips yang Melibatkan Pengguna untuk : i) Separuh Tahun Pertama 2008, 2009 dan


Figure 44 : Number of Voltage Dips Incidents Affecting Customers and Not Affecting Customers in KHTP for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2007 to 2009

0

5

10

15

20

25

30

35

2007 2008 2009 2008 (Jan-June)

2009 (Jan-June)

2010 (Jan-June)

16

95 4

1 2

11 18

26

11 15

7

No. of Dips

Year

Voltage Dips Not affecting customers

Voltage Dips affecting customers




Gambarajah 45 : Taburan Insiden Voltage Dips di KHTP Pada Tahun 2007 Hingga 2010

(Sehingga Jun) Berdasarkan Standard IEC 61000-4-11 (Class 3)

Figure 45 : Incidents of Voltage Dips in KHTP for Year 2007 to 2010 (as at June) Plotted Base on

IEC 61000-4-11 (Class 3)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

100.0

0 400 800 1200 1600 2000 2400 2800 3200 3600 4000

Pe

rce

nt o

f E

quip

me

nt

Nom

ina

l V

olta

ge

(%

)

Duration (milliseconds)

Nur-2007 Nur-2008 Nur-2009 Nur-2010

Customer's Resposibility

Utility's Resposibility

20




Gambarajah 46 : SARFI70 Bagi NUR untuk : i) Separuh Tahun Pertama 2008, 2009 dan 2010 ii) Sepanjang Tahun 2007 Hingga 2009

Figure 46 : SARFI70 of NUR for : i) First Half Year of 2008, 2009 and 2010 ii) In the Year 2007 to 2009

0 0

1

0 0

1

4

2

1

1 1

0

0

1

2

3

4

5

2007 2008 2009 2008 (Jan-June) 2009 (Jan-June) 2010 (Jan-June)

Internal Causes External Causes

Disediakan oleh : Jabatan Kawal Selia Pembekalan dan Pasaran Elektrik

Suruhanjaya Tenaga

Prepared by : Electricity Supply and Market Regu lation Department

Energy Commission


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