Report on Performance of the Electricity Supply Services in Malaysia

Transcription

REPORT ON THE PERFORMANCE OF THE ELECTRICITY SUPPLY SERVICES IN MALAYSIA
REPORT ON THE PERFORMANCE OF THE ELECTRICITY SUPPLY SERVICES IN MALAYSIA
REPORT
ONON
THE
REPORT
THE
PERFORMANCE
THE
PERFORMANCEOFOF
THEELECTRICITY
ELECTRICITY
SUPPLY
SUPPLYSERVICES
SERVICESININMALAYSIA
MALAYSIA
Suruhanjaya
Tenaga
Suruhanjaya
Tenaga
(Energy
Commission)
(Energy
Commission)
YEAR 2005 EDITION
Tel : 603-2612
5400 5400
Tel : 603-2612
Fax : 603-2693
7791 7791
Fax : 603-2693
EmailEmail
: [email protected]
: [email protected]
Url : www.st.gov.my
Url : www.st.gov.my
YEAR
2005
EDITION
YEAR
2005
EDITION
YEAR 2005 EDITION
13th Floor,
Menara
TH Perdana
13th Floor,
Menara
TH Perdana
1001 1001
Jalan Jalan
SultanSultan
IsmailIsmail
5025050250
KualaKuala
Lumpur,
Malaysia
Lumpur,
Malaysia
www.st.gov.my
www.st.gov.my
REPORT ON
THE PERFORMANCE
Of The Electricity Supply
Services In Malaysia
YEAR
2005
EDITION
Published by:
A. INTRODUCTION
Prepared by :
Electricity Supply Department
Energy Commission
Published by:
Energy Commission
13th Floor, Menara TH Perdana,
1001 Jalan Sultan Ismail,
50250 Kuala Lumpur, Malaysia
Tel
Fax
Email
Url
: 603-2612 5400
: 603-2693 7791
: [email protected]
: www.st.gov.my
1.0
Introduction
This report contains a brief statistical information on the performance of the electricity supply
services in Malaysia for the year 2004. It provides information and statistics on the
performance of the services provided by the main utilities i.e. Tenaga Nasional Berhad (TNB)
in Peninsular Malaysia, Sabah Electricity Sdn. Bhd. (SESB) in Sabah, Sarawak Electricity Supply
Corporation (SESCO) in Sarawak and NUR Distribution Sdn. Bhd. in Kulim Hi-Tech Park, Kulim
Kedah. The information in this report includes:•
•
•
•
•
•
•
•
Installed generation capacity and maximum demand of the grid;
sales of electricity;
reliability of the transmission system and distribution system;
number and causes of supply interruptions;
performance indices of electricity supply such as SAIDI, SAIFI dan CAIDI;
statistics of voltage excursion incidents;
performance of customer services and
prices of electricity in Malaysia in comparison with other countries.
A massive tsunami in the Indian Ocean hit some countries in South Asia and South East Asia
on 26 December and caused serious destruction to the coastal areas of these countries.
However the power stations along the coastline of Peninsular Malaysia were not hit by the
tsunami and hence the security of the grid system was not affected.
Report On The Performance Of The Electricity Supply Services In Malaysia Year 2005 Edition
1
A. INTRODUCTION
The information and statistics in this report are extracted from :•
•
•
•
monthly reports submitted by the electricity supply utilities;
monthly reports submitted by the distribution licensees;
monthly reports submitted by the Grid System Operator of Peninsular Malaysia;
monthly reports submitted by the power producers such as independent power
producers, co-generators and self-generators;
• complaints received by the Energy Commission;
• complaints in some local newspapers; and
• survey on customer satisfaction.
B. ELECTRICITY SUPPLY AND DEMAND
2.0
Installed Generation Capacity - Maximum Demand
2.1
Grid System of TNB
In the year 2004, the maximum demand of the grid system in Peninsular Malaysia grew by
6.1% from 11,329 MW in the year 2003 to 12,023 MW recorded on 13 May 2004. Although
there was no addition of new generation capacity, the total generation was more than
sufficient to meet the demand as the reserved margin was in the region of 40%. The total
installed generation capacity had reduced from about 17,150 MW in early 2004 to 16,850
MW due to retirement of the remaining three generating units totalling 297 MW in Tuanku
Jaafar Power Station (TJPS), Port Dickson in May 2004, for the construction of the second block
of combined cycle unit of 750 MW under the TJPS redevelopment program of 2 x 750 MW.
Of the total installed capacity in the year 2004, 59% or 9,960 MW was owned by TNB and
the remaining 6,890 MW by IPP's. Figure 1 shows the maximum demand and installed
generation capacity in the year 2004.
2
3
Demand/Capacity(MW)
Figure 1 : Monthly Maximum Demand and Installed Generation Capacity of the
Grid System in Peninsular Malaysia
18,000
17,147
17,147
17,147
17,147 16,850*
16,850*
16,850*
16,850*
16,850*
16,850*
16,850*
16,850*
16,000
2.2
Grid System of SESB
The project for interconnecting the West Coast Grid with the East Coast Grid in Sabah is still
under construction. As such the maximum demand given in this report is the arithmetic sum
of the maximum demands of the West Coast Grid and the East Coast Grid. For the year 2004
this maximum demand had grew by 7.4% to 481 MW from 448 MW in year 2003. However,
the total installed generation capacity had decreased to 750 MW from 782 MW in the year
2003 due to decommission of some small generating plants.
Installed Generation Capacity
Figure 2 shows the sum of the monthly maximum demands of the West Coast Grid and the
East Coast Grid and the installed generation capacity in the year 2004 and the previous 3
years.
14,000
Maximum Demand
12,000
11,653
11,856
11,040
10,913
9,603
9,742
Mar
Apr
10,562
10,548
10,436
9,687
11,722 11,638
11,041 11,097 11,071 10,946
10,783
10,730
11,948
10,742
10,602
9,893 9,875
11,726 11,727
11,251 11,329 11,239 11,218
10,301
10,000
11,925
11,610
11,304 11,372
10,598 10,656
12,023
10,678
10,629
10,060
10,014
9,948 9,965 9,973
9,929
9,853
9,771
9,381
8,000
Jan
Feb
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Month
2001
2002
2003
2004
2004 Installed Generation Capacity
N.B.: (*) The reduction in capacity is due to decommissioning of 3 generating units totalling 297 MW in
Tuanku Jaafar Power Station (TJPS), Port Dickson
4
5
Demand/Capacity(MW)
Figure 2 : Monthly Maximum Demands for West Coast of Sabah, Tawau and
Sandakan & Installed Generation Capacity
2.3
800
750
750
750
750
750
750
750
750
750
750
750
750
477
481
474
462
432
413
401
384
358
338
470
480
448
424
400
Table 1 : Maximum Demand of Sarawak Electricity Supply Corporation (SESCO) System
in the Year 2001 to 2004
Maximum Demand
449
381
385
348
355
363
Mar
Apr
385
361
383
367
422
424
391
385
363
366
477
446
447
448
380
385
382
363
364
348
343
335
481
473
In Sarawak, the maximum demand of the SESCO's grid grew by 6.5% to 685 MW from 643
MW in year 2003. However, the total installed generation capacity in Sarawak decreased by
1.4% to 855 MW from 867 MW in the year 2003.
Table 1 shows the maximum demand of the SESCO's grid system in Sarawak in the year 2004
and the previous 3 years while Figure 3 represents the monthly maximum demands of the grid
system and the installed generation capacity in Sarawak in the year 2003 and 2004.
600
Grid System of SESCO
467
441
381
Year
Maximum Demand (MW)
2001
2002
2003
2004
574
604
643
685
350
200
Jan
Feb
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Month
2001
2002
2003
2004
N.B.: The grids in the West Coast and the East Coast of Sabah are not interconnected. The maximum
demand shown are the arithmetic sum of the maximum demands of the two systems.
6
7
Demand/Capacity (M
950
855 855
855
855 855
850
750
685
628
850
855 855
855 855 855
645
635
626
623
643
625
666 670
617
648
629
607
585
560
855
2003
2004
Gambarajah 4 : Kehendak Maksimum Bulanan NUR Distribution Sdn.
Maximum Demand
750
685
670
662
628
650
635
585
680
669
645
648
581
550
669
648
581
597
626
606
623
643
625
Figure 4 : Monthly Maximum Demand
of NUR Distribution Sdn. Bhd.
Bhd.
666 670
617
648
Demand (MW)
Demand/Capacity (MW)
950
855
855
The electricity supply in Kulim Hi-Tech Park (KHTP) is served by NUR Distribution Sdn. Bhd. NUR
Distribution
450purchases electricity from TNB and distributes to the consumers in KHTP. In the
Jan Feb demand
Mar Apr
Mayonly
Jungrew
Julmarginally
Aug SepfromOct
Novin Dec
year 2004, the maximum
in KHTP
52 MW
the year 2003
to 54 MW.
Month
Figure
3 : Monthly
maximum
Demand
of the SESCO’s
GridSESCO
and
Gambarajah
3 : Kehendak
Maksimum
Bulanan
Sistem Grid
dan Kapasiti
Penjanaan
Installed Generation
Capacity
for the Year 2004
855 855
680
670
Distribution System
597 606 of NUR
550
855
855 855 855
650
855 855
855 855
B. ELECTRICITY SUPPLY
AND
DEMAND
Maximum
Demand
662
2.4
855
629
607
560
54
53
53
52
51
52
52
51 51
50
Jan Feb Mar Apr May Jun
Jul Aug
2004
53
53
53
52
50
50
50
50
51
49
52
52
51
51
52
50
48
47
Month
2003
52
49
48
Sep Oct Nov Dec
53
52
52
51
450
54
Jul Aug
Sep Oct Nov Dec
Month
Demand (MW)
Gambarajah 4 : Kehendak Maksimum Bulanan NUR Distribution Sdn.
Bhd.
54
51
53
52
52
52
51 51
50
49
48
53
52
53
53
53
52
52
51
2003
2004
54
53
52
2002
50
50
50
50
51
49
52
52
51
51
52
50
48
47
8
Jul Aug
Sep Oct Nov Dec
9
3.0
Sales of Electricity
3.2
3.1
Energy Sales of TNB
For the year 2004, the sales of electricity by Sabah Electricity Sdn. Bhd. (SESB) had increased
by 9.6% to 2,556 GWh from 2,333 GWh sold in the year 2003. The commercial sector used
37.2% of the total energy sold. This is followed by the domestic sector (31.3%), industrial
sector (30.2%) and public lighting (1.4%), as shown in Figure 6. The total number of
consumers of SESB had increased by 4.0 % from 322,830 in the year 2003 to 335,800 in the
year 2004, comprising of domestic consumers (83.5%), commercial consumers (14.9%),
public lighting (0.9%) and industrial consumers (0.8%).
In the year 2004, the total energy sold by Tenaga Nasional Berhad was 68,974 GWh, an
increase of 7.3% over the 64,292 GWh sold in the year 2003. Figure 5 shows the composition
of sales among different categories of consumers. Out of the total energy sold in the year
2004, the industrial sector consumed the most i.e. 51.8% while the commercial, domestic,
public lighting and mining sectors consumed 29.2%, 18.2%, 1.0% and 0.1% respectively. The
total number of consumers in Peninsular Malaysia in the year 2004 had increased by 3.4% to
6.0 million from 5.8 million in the year 2003. The consumers comprised of industrial (0.4%),
commercial (15.6%), domestic (83.3%), public lighting (0.6%) and other customers (0.1%).
Energy Sales of SESB
Figure 6 : Total Energy Sales (GWh) of
Sabah Electricity Sdn. Bhd.
Tenaga Nasional Berhad
30.2%
37.2%
31.3%
1.4%
2004
51.8%
28.9%
30.0%
0.1%
Year
2004
Total Sales for Year 2004 = 68,974 GWh
52.0%
Year
18.2% 1.0%
28.6%
52.0%
28.5%
28.5%
2002
0.1%
0
Industrial
0
Industrial
10
10,000
Commercial
20,000
30,000
Energy Sales (GWh)
Domestic
Public Lighting
38.5%
31.7%
1.4%
18.3% 1.1%
2002
1.5%
0.1%
31.1%
2003
18.2% 1.2%
2003
37.5%
200
400
600
800
Energy Sales (GWh)
Commercial
Domestic
1,000
Public Lighting
40,000
Mining
11
42.2%
31.7%
25.0%
1.1%
2004
B. ELECTRICITY
SUPPLY AND DEMAND
Year
42.1%
31.9%
24.9%
1.1%
2003
3.3
3.4
Energy Sales of SESCO
The sales of electricity by Sarawak Electricity Supply Corporation in the year 2002 to 2004 are
as shown in Figure 7. In the year 2004, the total energy sold by SESCO was 3,679 GWh, a
6.0% increase over the 3,471 GWh sold in the year 2003. Out of the total energy sold in year
2004, the industrial sector consumed the most at about 42.2%. This is followed by commercial
sector (31.7%), domestic sector (25.0%) and public lighting (1.1%). The total number of
consumers in Sarawak in the year 2004 increased by 4.0% to 400,350 from 385,000 in the
year 2003. These customers comprised of industrial consumers (0.2%), commercial consumers
(14.6%), domestic consumers (84.0%) and public lighting (1.2%).
Sarawak Electricity Supply Corporation
42.2%
31.7%
Energy Sales of NUR
42.5%
31.6%
24.8%
In the year 2004, the2002
total energy sold in Kulim Hi-Tech Park (KHTP) by1.1%
NUR Distribution Sdn.
Bhd. increased by 3.3% to 408 GWh
395Year
GWh
Total from
Sales for
2002in= the
3,248year
GWh2003. Out of the total sales
in 2004, 95.9% was to the industrial consumers. This is followed by commercial sector,
0 lighting at
5003.1%, 0.6%
1,000and 0.4%
1,500
2,000
domestic sector and public
respectively.
The total number of
Sales (GWh)
consumers of NUR Distribution Sdn. Bhd. inEnergy
the year
2004 was 1,501, an increase of 20.0%
Commercial
Lighting consumers (1.5%),
over the 1,250 in the yearIndustrial
2003. These
customersDomestic
comprisedPublic
of industrial
commercial consumers (5.5%), domestic consumers (89.6%) and public lighting (3.3%).
Figure 8 shows the energy sold in KHTP by NUR Distribution in the year 2004 and the previous
2 years.
Figure 8 : Total Energy Sales (GWh) of NUR Distribution
Sdn. Bhd.
25.0%
1.1%
3.1%
0.6%
95.9%
2004
0.4%
2004
Total Sales for Year 2004 = 408 GWh
31.9%
24.9%
0.4%
2003
42.5%
31.6%
0.4%
2003
24.8%
96.6%
2.8%
0.3%
1.1%
2002
0
500
Industrial
1,000
1,500
Energy Sales (GWh)
Commercial
Domestic
0.2%
2002
12
3.0%
96.3%
1.1%
Year
Year
42.1%
2,000
Public Lighting
0
100
200
300
400
Energy Sales (GWh)
Industrial
Commercial
Domestic
Public Lighting
13
C. PERFORMANCE OF TRANSMISSION SYSTEM
4.0
Performance of Transmission System
4.1
Transmission System of TNB
Among the indicators used in assessing the performance of the transmission system are :•
•
•
•
delivery point unreliability index (system minutes);
unsupplied energy during load sheddings and trippings;
numbers of load sheddings and trippings; and
average interruptions per delivery point
Table 2 shows the total number of trippings of the transmission network in Peninsular Malaysia
with a load loss of 50 MW and above in the year 2003 and 2004 while Table 3 shows the
monthly number of trippings in the year 2004.
There were 10 incidents of tripping in the year 2004 compared with 7 in the year 2003.
However the number of load shedding and unsupplied energy had reduced.
Table 2 : Transmission System Trippings with a Load Loss of 50 MW and Above for the Year 2003
and 2004 in Peninsular Malaysia
Indicators
2003
2004
No. of Tripping without Load Shedding
3
9
No. of Tripping with Load Shedding
4
1
Unsupplied Energy due to Tripping (MWh)
5,673.4
596.1
Unsupplied Energy during load Shedding (MWh)
1,618.0
178.0
Table 3 : Monthly Transmission System Trippings with a Load Loss of 50 MW and Above for the
Year 2004 in Peninsular Malaysia
Indicators
Jan
Feb
Mar
Apr
May
Jun
No. of Tripping without Load
Shedding
1
1
1
1
1
0
1
1
1
0
1
0
No. of Tripping with Load
Shedding
0
0
0
0
0
0
0
0
1
0
0
0
Maximum Load Losses (MW)
110
56
60
217
52
0
110
100
85
68.0
Unsupplied Energy due to
Tripping (MWh)
16.5 82.67
22
229.28 64.77
0
18.6
10
72.3
80.0
Average Unsupplied Energy
per Trip (MWh)
16.5 82.67
22
229.28 64.77
0
18.6
10
72.3
80.0
Average Duration per
Trip (Hour)
0:09
1:15 0:00 0:10 0:06 1:02
1:11
Unsupplied Energy during
Load Shedding (MWh)
14
0
1:29 0:22
0
0
1:03
0
0
0
July Aug Sept Oct Nov Dec
0
0
178.0
0
0
15
Figure 10 : System Minutes of TNB’s Transmission System
Figure 9 : Number of Transmission System Tripping with a Load Loss of
50 MW and Above for the Year 2001, 2002, 2003 and 2004
Delivery Point Unreliability Index (System Minutes)
14
2
80
1
10
4*
8
6
10
4
9
9
2
3
0
2001
74
1
2002
2003
2004
System Minutes (Minutes)
No. of Incidents
12
With incident on 1st
September 2003
60
46
40
19
20
17
20
14
Year
No. of Tripping with Load Shedding
No. of Tripping without Load Shedding
0
1998/99
N.B.: (*) Including incident of tripping on 1st September 2003
1999/00
2000/01
2001/02
2002/03
2003/04
Financial Year
System minutes of the TNB's transmission system from the financial year 1998/99 to financial
year 2003/04 are as shown in Figure 10. In the financial year 2003/04 system minutes of TNB's
transmission system had increased to 46 minutes compared with 14 minutes in the financial
year 2002/03. The increase was due to the tripping of the Bukit Beruntung - Batu Gajah lines
on 1st September 2003 causing wide interruption in the Northern part of the Peninsula. This
single incident accounted for 28.14 minutes of the total 46 minutes in the financial year
2003/04.
16
17
4.2
Transmisssion System of SESB
Figure 11 : System Minutes of SESB’s Transmission System
The number of trippings with a load loss of 50 MW and above had increased from 2 incidents
in the financial year 2003 to 3 incidents in the year 2004. Table 4 shows the numbers of SESB's
transmission system trippings with a load loss of 50 MW and above in financial year 2004.
Delivery Point Unreliability Index (System Minutes)
600
Table 4 : Statistics of Transmision System Trippings of SESB with a Load Loss of 50 MW and
Above in the Financial Year 2004
Sept
Oct Nov Dec Jan Feb Mar Apr
May
Jun
Jul Aug
Shedding
1
0
0
0
0
0
0
0
1
1
0
0
Shedding
0
0
0
0
0
0
0
0
0
0
0
0
260
131
218
Tripping (MWh)
335.5
241.17 82.71
System Minutes (Minutes)
Indicators
490
400
200
142
86
0
1999/00
per Trip (MWh)
335.5
Trip (Hour)
24.1
1.41
1.35
0
0
0
Load Shedding (MWh)
241.17 82.71
263
239
2000/01
2001/02
2002/03
2003/04
Financial Year
System minutes of SESB's transmission system for the financial year 2004 had increased by
65% to 142 minutes from 86 minutes in the financial year 2003. Figure 11 shows the system
minutes of SESB's transmission system in 2004 and the previous few years.
18
19
4.3
D. PERFORMANCE OF DISTRIBUTION SYSTEM
Transmission System of SESCO
5.0
The incident of trippings of SESCO's transmission system in Sarawak reduced by 57% from 21
incidents in the year 2003 to 9 incidents in the year 2004. Of the total of 9 incidents, only 1
incident involved load shedding.
Table 5 : Statistics of Monthly Transmission System Trippings in Sarawak for the Year 2004
Indicators
Jan
Feb Mar Apr May Jun
Jul
Aug Sept Oct Nov Dec
Shedding
3
0
1
0
1
2
0
0
0
0
2
0
Shedding
0
0
0
0
1
0
0
0
0
0
0
0
30
0
46
0
140
77
0
0
0
0
105
0
Tripping (MWh)
34
0
19
0
74
65
0
0
0
0
77
0
per Trip (MWh)
11
0
19
0
74
33
0
0
0
0
35
0
Trip (Hour)
31
0
25
0
78
18
0
0
0
0
181
0
Load Shedding (MWh)
0
0
0
0
71
0
0
0
0
0
0
0
20
Performance of Distribution System
The following aspects are used to assess the performance of the distribution systems:•
•
•
•
•
•
•
•
number of supply interruptions
duration of supply interruptions
type of supply interruptions
causes of supply interruptions
System Average Interruption Duration Index (SAIDI)
System Average Interruption Frequency Index (SAIFI)
Customer Average Interruption Duration Index (CAIDI)
customer complaints
21
5.1
Statistics of Supply Interruptions
5.1.1
Statistics of Supply Interruptions of TNB
From 1st September 2004, i.e. commencement of the 2004/2005 financial year, TNB has
included interruption of supply to a single customer for more than 1 minute, which was
omitted in the past, in its statistics of supply interruptions. As such for the year 2004, the
number of supply interruptions per 1000 customers in TNB's distribution system in Peninsular
Malaysia recorded had increased by 85.7% to 9.1 from 4.9 interruptions in year 2003. Out of
the total number of supply interruptions, 96.6% was unscheduled interruptions while the
remaining 3.3% was scheduled interruptions.
(a)
implementing various projects to strengthen the distributions network such as :• changing bare conductors to insulated aerial bundled cable (ABC)
• injecting new feeders
• constructing new substations
(b)
enhancing preventive maintenance programmes which include :• scheduled preventive maintenance of substations on a continuous basis
• condition monitoring of substation equipment, lines and cables
• preventive testing of cables by very low frequency (VLF) test method
(c)
reviewing manuals on operation and asset maintenance to enhance the quality of
work.
Figure 12 shows the numbers of supply interruptions per 1000 customers of TNB in the last 5
years. In the year 2004, the monthly average number of supply interruptions of TNB increased
by 91.5% to 4,529 from 2,365 in the year 2003 as shown in Figure 13. Selangor, Wilayah
Persekutuan, Kedah and Johor had the highest number of supply interruptions in the year 2004
compared with the other states.
Among the efforts being carried out by TNB to improve the reliability of the distribution system
are:-
22
23
Figure 12 : Number of Electricity Supply Interruptions Per 1000 Customers of TNB from
the Year 2000 to 2004
Unscheduled interruptions of TNB
9.7
Number
8.8
2000
7.0
4.5
4.5
2001
2002
2003
N.B.:
Number of customers :
5.0 Million (Year 2000)
Figure 13
Monthly
Supply Gangguan
Interruptions
of TNBElektrik
in 2004Bulanan
Gambarajah
1 : :purata
Bilangan
Bekalan
TNB Pada Tahun 2004
2004
Year
12,000
Scheduled Interruptions of TNB
2000
2001
2002
0.4
2003
8,000
0.3
2004
8,818
Change in reportin g system to include
interruptions of more than 1 minute to single
customer, which were previously omitted
7,891
6,882
Number
0.5
9,847
10,000
1.0
Number
1.2
Year
6,000
4,529
4,000
3,471
2,300
2,365
2,677
2,240
2,113
3,012
2,874
2,488
2,692
2,814
2,000
Total Interruptions of TNB
2004
c
De
2003
g
Se
p
Oc
t
No
v
2002
Au
4.9
01
20 Mo
02 nt
h
20 Mo ly A
03 nt ve
h
r
20 Mo ly A age
04 nt ve
h
M ly A rag
e
on
th vera
ly
Av ge
er
ag
e
Ja
n
Fe
b
M
ar
Ap
ril
M
ay
2001
5.0
20
Number
2000
0
9.1
8.0
Ju
n
Ju
l
11.0
Month
Year
24
25
14 : Jumlah
Kumulatif
Bilangan in
Gangguan
Figure 14Gambarajah
: Total Number
of Supply
Interruptions
Various Bekalan
States in
Elektrik bagi Negeri-Negeri di Semenanjung Malaysia Pada Tahun
Peninsular Malaysia2003
in the
Year
2003
and
2004
dan 2004
5.1.2
In the year 2004, the total numbers of electricity supply interruptions per 1000 customers of
SESB in Sabah was 47.3, an increase of 52.1% over the 31.1 interruptions recorded in the year
2003. Out of the total number of interruptions, 42.4 or 89.6% was unscheduled interruptions
and the remaining 10.4% was scheduled interruptions. Figure 15 shows the number of
electricity supply interruptions per 1000 customers of SESB in Sabah in the year 2004
compared with the previous few years.
7,997
8,922
10,000
The monthly average number of supply interruptions in Sabah had also increased by 58% from
838 in the year 2003 to 1,325 in the year 2004 as shown in Figure 16.
6,052
6,175
7,131
7,241
8,000
4,979
5,611
6,000
4,222
Number
Statistics of Supply Interruptions of SESB
1,250
16
12
358
472
699
1,409
1,564
1,702
1,956
2,241
2,261
1,007
2,000
1,726
1,831
2,592
3,300
4,000
Kelantan
Terengganu
Pahang
Johore
Malacca
N. Sembilan
Putrajaya
W.P. Kuala Lumpur
Selangor
Perak
Penang
Kedah
Perlis
0
State
2003
26
2004
27
Figure 15 : Number of Electricity Supply Interruptions Per 1000 Customers of
SESB from the Year 2000 to 2004
Unscheduled Interruptions of SESB
2003
2004
1,400
2002
2003
2004
800
974
967
838
755
2001
1,000
788
2000
1,200
870
2.6
Number
3.3
1,081
1,325
5.0
4.1
Number
4.1
1,600
1,433
1,800
Scheduled Interruptions of SESB
1,477
Figure 16 : Monthly Supply Interruptions of SESB in 2004
Year
1,524
2002
1,590
2001
1,633
2000
28.5
1,531
26.9
1,334
30.4
1,601
Number
42.4
31.6
N.B.:
Number of Customers :
290,412 (Year 2000)
302,981 (Year 2001)
313,381 (Year 2002)
322,830 (Year 2003)
335,800 (Year 2004)
600
Year
400
200
Total Interruptions of SESB
34.5
Number
30.2
31.1
01
20 Mo
02 nth
20 Mo ly A
03 nth ver
20 Mo ly A age
04 nth ver
M ly A ag
e
on
th vera
ly
g
Av e
er
ag
e
Ja
n
Fe
b
M
ar
Ap
r
M
ay
Ju
ne
Ju
l
Au
g
Se
pt
Oc
t
No
v
De
c
35.7
0
47.3
20
Month
2000
2001
2002
2003
2004
Year
28
29
Figure 17 : Number of Electricity Supply Interruptions Per 1000 Customers of SESCO
in the Year 2003 and 2004
5.1.3
Statistics of Supply Interruptions of SESCO
Unscheduled interruptions of SESCO
8.5
8.2
Number
In Sarawak, the numbers of electricity supply interruptions per 1000 customers for the year
2004 had increased by 4.0% to 10.6 interruptions from 10.2 interruptions in the year 2003.
Table 6 and Figure 17 show the numbers of electricity supply interruptions per 1000 customers
in Sarawak in the year 2004 compared with the previous few years. Of the total numbers of
interruptions, 8.2 or 77.4% was unscheduled interruptions and the remaining 22.6% was
scheduled interruptions.
2003
The monthly average of supply interruptions in Sarawak for the year 2004 had also increased
by 8.3% to 354 from 327 in the year 2003 as shown in Figure 18.
Table 6 : Number of Electricity Supply Interruptions Per 1000 Customers of SESCO
for the Year 2001 to 2004
2001
2002
2003
2004
No. of Interruptions Per
1000 Customers
17.6
11.5
10.2
10.6
Scheduled Interruptions of SESCO
Number
Year
2004
Year
2.4
1.7
2003
2004
Year
Total Interruptions of SESCO
10.6
Number
10.2
2003
2004
Year
30
31
5.1.4
N.B.:
Numbers of customers
341,224 (Year 2001)
361,545 (Year 2002)
385,003 (Year 2003)
400,348 (Year 2004)
Statistics of Supply Interruptions of NUR Distribution
Figure 18 shows the number of electricity supply interruptions per 1000 customers in Kulim HiTech Park for the past few years. The numbers of supply interruptions per 1000 customers in
the year 2004 had increased by 33.2% to 79.9 from 60.0 interruptions in the previous year.
The monthly average number of supply interruptions in Kulim Hi-Tech Park in the year 2004
had increased to 10 from 6 incidents in the year 2003, as shown in Figure 20.
450
Gambarajah
: Purata
Bilangan
Gangguan
Figure 18 : 18
Monthly
Supply
Interruptions
of Bekalan
SESCO inElektrik
2004
Bulanan SESCO Pada Tahun 2004
400
350
Number
300
250
388
398
381
432
400
383
375
354
347
327
338
297 285
287
280
200
150
100
50
02
20 Mon
03 th
ly
20 Mon Av
04 th era
M ly A ge
on
th vera
ly
Av ge
er
ag
e
Ja
n
Fe
b
M
ar
Ap
ril
M
ay
Ju
n
Ju
l
Au
g
Se
p
Oc
t
No
v
De
c
0
20
Month
32
33
Figure 19 : Number of Electricity Supply Interruptions Per 1000 Customers in
Kulim Hi-Tech Park for the Years 2000 to 2004
Unscheduled Interruptions of NUR Distribution Sdn. Bhd.
Number
58.6
36.9
2000
2001
32.3
2002
22.4
26.0
2003
2004
N.B.:
Numbers of customers
290 (Year 2000)
704 (Year 2001)
867 (Year 2002)
1,250 (Year 2003)
1,501 (Year 2004)
Figure 20 : Monthly Supply Interruptions of NUR Distribution Sdn. Bhd. in 2004
Gambarajah 20 : Purata Bilangan Gangguan Bekalan
elektrik Bulanan NUR Distribution Sdn. Bhd. Tahun 2004
Year
Scheduled Interruptions of NUR Distribution Sdn. Bhd.
41.4
36.9
40.4
2000
2001
2002
37.6
2003
15
14
14
14
2004
Year
13
12
12
Number
Number
16
54.0
11
10
10
9
9
8
6
7
4
5
6
6
5
5
4
2
Total Interruptions of NUR Distribution Sdn. Bhd.
100.0
72.7
Number
73.9
79.9
60.0
2000
2001
2002
2003
0
e
e
e
e
ag
ag
ag
ag
er ver ver ver
v
A yA yA yA
ly
l
l
l
th nth nth nth
on
o
o
o
M
M
M
M
01 002 003 004
20
2
2
2
n
Ja
r
y
il
b
Fe Ma Apr Ma
n
Ju
l
Ju
g
Au
p
Se
t
Oc
v
No
c
De
Year
2004
Year
34
35
5.2
Distribution System of TNB
5.2.1
Reliability of electricity supply is normally measured by the duration and frequency of
interruptions of supply experienced by customers. System Average Interruption Duration Index
(SAIDI) represents the total duration in minutes on average that a customer is without supply
in a certain period, normally a year.
FigureGambarajah
21 : SAIDI21
(Minutes/Customer/Year)
for the Various untuk
States in
: Indeks SAIDI (Minit/Pelanggan/Tahun)
Negeri-negeri
di Malaysia
Semenanjung
Malaysia
bagi Tahun
2002,2004
Peninsular
for the
Year 2002,
2003 and
2003 dan 2004
129.0
Semenanjung Malaysia
167.6
128.0
136
Kelantan
207.7
105
177.3
167.5
Terengganu
207.8
Figure 21 shows the SAIDI of TNB in various states in Peninsular Malaysia in the last 3 years.
The SAIDI in the year 2004 for most of the states in Peninsula, with the exception of Johore,
Terengganu and Kedah, had reduced compared with the year 2003.
Pahang
For the year 2004, the overall SAIDI of TNB had reduced by 22.8% from 167.6 minutes in the
year 2003 to 129.0 minutes. This reflects an improvement in the performance of the supply
system of TNB in the year 2004. The monthly SAIDI in Peninsular Malaysia in the year 2004
are as shown in Figure 22.
Malacca
140.7
213.8
180.2
183.8
State
Johore
103
78.7
52.1
85.7
77.8
N. Sembilan
Putrajaya
261.7
280.3
119.6
1.6
35.2
0
98.9
101.2
W.P. Kuala Lumpur
82.5
110.1
95.8
Selangor
146.9
114.8
Perak
162.3
119.9
67.6
Penang
330.0
74.6
Kedah
161.4
173.3
90
54.7
Perlis
250.8
35
0
50
100
150
200
250
300
350
SAIDI
2002
36
2003
2004
37
5.2.2
Figure 22 : Monthly SAIDI in Peninsular Malaysia for the Year 2004
Gambarajah 22 : Indeks SAIDI Bulanan di Semenanjung Malaysia Pada
Tahun 2004
167.6*
The System Average Interruption Frequency Index (SAIFI) represents the number of occasions
per year a customer experienced supply interruption. The SAIFI for the various states in
Peninsular Malaysia in the year 2004 are as shown in Figure 23 while Figure 24 shows the
monthly SAIFI in Peninsular Malaysia in the year 2004.
180.0
SAIDI
120.0
129.0
119.5
140.0
128.0
160.0
In the year 2004, the overall SAIFI in Peninsular Malaysia had dropped to 1.30 compared with
1.69 in the previous year. Terengganu, Kedah and Johor recorded higher SAIFI compared with
the other states.
100.0
80.0
60.0
14.2
14.9
De
13.3
t
No
v
10.9
9.5
10.6
7.9
9.4
9.0
9.9
9.4
20.0
10.1
40.0
Oc
c
pt
Se
g
Au
Fe
b
M
ar
Ap
ril
M
ay
Ju
n
Ju
ly
20
02
20 SAID
03 I
20 SAID
03 I
20 SAID
04 I
SA
ID
I
Ja
n
0.0
Month
N.B.: * With incident of tripping on 1st September 2003
38
39
25 : Various
Indeks CAIDI
Negeri-Negeri
di
Figure 23Gambarajah
: SAIFI for the
Statesbagi
in Peninsular
Malaysia
for the
Semenanjung
Malaysia
Year 2003 and
2004Pada Tahun 2003 dan 2004
1.80
1.69
1.65
1.19
Pahang
1.20
1.98
SAIFI
1.80
Johore
2.14
1.08
Malacca
State
1.40
1.30
2.26
2.65
Terengganu
1.30
1.60
2.87
1.39
Kelantan
1.69*
1.30
Peninsular Malaysia
1.00
0.80
0.71
0.79
0.65
N. Sembilan
Putrajaya
Figure 24 : 24
Monthly
in Peninsular
MalaysiaMalaysia
for the Year
Gambarajah
: SAIFISAIFI
Bulanan
di Semenanjung
Pada2004
Tahun
2004
0.60
0.01
0.40
Selangor
0.95
0.14
0.13
0.13
0.11
0.10
0.09
0.09
02
20 SA
03 IFI
20 SA
03 IFI
20 SA
04 IFI
SA
IFI
Ja
n
Fe
b
M
ar
Ap
ril
M
ay
Ju
n
Ju
Au l
g
Se
pt
Oc
t
No
v
De
c
1.59
20
2.11
Penang
0.11
0.00
0.86
Perak
0.09
0.20
1.06
0.10
0.84
0.10
W.P. Kuala Lumpur
0.11
0.57
0.97
Month
2.00
1.89
Kedah
2.52
1.26
Perlis
2.04
0.00
1.00
2.00
3.00
4.00
SAIFI
2003
40
2004
41
5.2.3
Apart from the SAIDI and SAIFI, the performance of the electricity supply system is also
measured using the Customer Average Interruption Duration Index (CAIDI), which represents
the average time taken for supply to be restored to a customer after an interruption has
occurred.
25 :Various
Indeks CAIDI
bagi
di
Figure 25 :Gambarajah
CAIDI for the
States
in Negeri-Negeri
Peninsular Malaysia
for the
Semenanjung
Malaysia
Year 2003 and
2004 Pada Tahun 2003 dan 2004
99.3
99.2
82.4
72.4
Peninsular Malaysia
Kelantan
Figure 25 shows the CAIDI for the various states in Peninsular Malaysia in the year 2004
whereas Figure 26 shows the monthly CAIDI in Peninsular Malaysia. The overall CAIDI in
Peninsular Malaysia for the year 2004 was 99.3 minutes, which is almost the same as the
previous year of 99.2 minutes. Putrajaya, Johore, Pahang and W.P. Kuala Lumpur recorded
higher CAIDI compared with other states.
78.4
63.2
Terengganu
118.2
Pahang
132.2
118.8
Johore
84.2
95.5
110.9
State
Malacca
108.4
119.7
N. Sembilan
164.0
Putrajaya
61.8
117.7
W.P. Kuala Lumpur
95.5
115.9
Selangor
111.4
72.2
76.9
69.7
Perak
Penang
165.0
85.4
Kedah
68.8
43.4
Perlis
123.0
0
50
100
150
200
CAIDI ( in Minutes)
2003
42
2004
43
Figure 26 : Monthly CAIDI in Peninsular Malaysia for the Year 2004
Gambarajah 26 : CAIDI Bulanan di Semenanjung Malaysia Pada Tahun
2004
120
112.2
CAIDI (in Minutes)
100
99.2* 99.3
98.5
94.6
85.6
92.1
94.8 96.3
88.7 92.2
99.0 106.0 102.8
94.0 95.5
80
5.3
Distribution System of SESB
5.3.1
In Sabah, the SAIDI in the year 2004 had increased by 50.0% from 1,729 minutes in the year
2003 to 2,594 minutes. This reflects a drop in the performance of the supply system of SESB
in the year 2004 compared with the previous year.
The SAIDI for SESB in Sabah in the year 2004 and the previous 2 years are as shown in Figure
27.
60
40
20
20
Ju
l
Au
g
Se
pt
Oc
t
No
v
De
c
n
Ju
Fe
b
M
ar
Ap
ril
M
ay
Ja
n
02
20 CAI
03 DI
20 CAI
03 DI
20 CAI
04 DI
CA
ID
I
0
Month
44
45
5.3.2
27 : Indeks SAIDI (Minit/Pelanggan/Tahun)
Figure 27Gambarajah
: SAIDI (Minutes/Customer/Year)
for the State of Sabah
bagi
Sabah
Pada
Tahun
for Negeri
the Year
2002,
2003
and2002,
20042003 dan 2004
SAIDI (Jan - Dec)
285
176
163
Dec
Nov
99
205
25.79
18.77
2.20
Gambarajah 28 : Indeks SAIFI Bulanan di Negeri Sabah
Dec
Figure 28 : Monthly
SAIFI2003
in dan
Sabah
1.78
Pada Tahun
2004for the Year 2003
and 2004
2.80
293
179
158
416
149
109
Sept
The monthly System Average
Interruption
Frequency
Index (SAIFI)
of SESB
in the year 2003 and
Gambarajah
28 : Indeks
SAIFI Bulanan
di Negeri
Sabah
Pada
TahunSAIFI
2003 for
danthe
2004
2004 are as shown in Figure 28. The
overall
state in Sabah had also increased
from 18.77 in the year 2003 to 25.79 in the year 2004. The SAIFI in the months of June and
August were higher compared with other months.
SAIFI ( Jan-Dec)
151
Oct
Nov
1.21
SAIFI ( Jan-Dec)
Dec
Aug
234
159
183
Sept
Jul
195
144
241
Aug Oct
Jun
267
181
137
May
234
141
158
Apr
Mar
Jan
0
500
3.43
2.06
1.90
1.89
1.52
2.05
1.76
1.66
Month
JulSept
3.43
3.25
1.90
Aug
Jun
1.83
2.05
Jul
1.66
2.57
1.45 3.25
Jun
1.83
1.33
2.57
1.26
1.45
AprMay
1.54
1.33
1.26
1.41
1.54
1.75
1.41
1.42
Mar Apr
FebMar
1.75
Feb
1000
1500
2000
2500
2003
3000
1.291.42
1.29
1.20
Jan
Jan
SAIDI
2002
1.21
May
151
113
60
80
124
141
Feb
0
18.77
1.78
1.52
1.76 2.80
Nov
126
108
135
109
157
143
25.79
2.06
1.892.20
Oct
Month
Month
2,594
1,729
1,779
1.20
0
5
5
10
10
2004
2003
2003
46
15
15
SAIFI
SAIFI
20
20
25
25
30
30
2004
2004
47
5.3.3
Gambarajah 29 : Indeks CAIDI Bulanan di Negeri Sabah
Pada Tahun 2003 dan 2004
Figure 29 shows the monthly CAIDI for the supply system of SESB in the year 2003 and 2004.
The overall CAIDI for the state of Sabah in the year 2004 had increased to 100.6 minutes from
100.6 and October were
92.1 CAIDI
minutes
in the year 2003. The CAIDI in the months of September
( Jan-Dec)
92.1
higher compared with other months in the year.
80.2
Dec
98.9
Figure
Nov
Gambarajah 29 : Indeks CAIDI Bulanan di Negeri Sabah
81.8
Tahun
2003 danfor
2004
29 : Monthly Pada
CAIDI
in Sabah
the Year
2003
Month
Sept
Aug
81.8
81.2
83.4
Jul
Month
84.1
82.0
68.2
Aug
94.8
90.9
86.9
96.9
SAIDI (Minutes)
2001
2002
2003
2004
731
610
418
325
94.4
99.0
May
70.9
Apr
90.986.2
96.9
94.4
86.2
79.5
Feb
62.1
111.6
86.8
70.9
Mar
Jan
Year
82.0
Jun
Feb
99.0
83.4
Jul
Apr
Mar
118.0
86.9
Sept
May
The SAIDI of SESCO's supply system in Sarawak in the year 2004 had reduced by 22.2% to
325 minutes from 418 minutes in the year 2003. This reflects an improved performance over
the previous few years.
102.9
94.894.8
Oct
Jun
Table 7 : SAIDI (Minutes/Customers/Year) of SESCO for the year 2001 to 2004
84.198.9
68.2
5.4.1
118.0
80.2
Nov
Distribution System of SESCO
Table 7 shows the SAIDI of SESCO in the year 2004 compared with the previous years, while
Figure 30 shows the monthly SAIDI in the year 2003 and 2004.
102.9
100.6
94.8
92.1
Dec
5.4
and 2004
81.2
Oct ( Jan-Dec)
CAIDI
111.6
86.8
79.5
103.1
62.1
Jan
0
20
0
40
20
60
40
60
80
80
103.1
100
100
120
120
140
140
CAIDI
(in Minutes)
CAIDI (in Minutes)
2003
2003
48
2004
2004
49
Gambarajah
30 :(Minutes/Customer/Year)
Indeks SAIDI (Minit/Pelanggan/Tahun)
SESCO
Figure
30 : SAIDI
in Sarawak for bagi
the Year
2003
and 2004 Pada Tahun 2003 dan 2004
5.5
Distribution System of NUR
5.5.1
325
SAIDI ( Jan-Dec)
418
Dec
38.3
27.0
Nov
34.7
39.7
Oct
33.0
29.0
Sept
25.5
33.9
Table 8 and Figure 31 show the yearly and monthly SAIDI of the supply system in Kulim HiTech Park respectively.
The SAIDI had reduced by 71.9% from 135 minutes in the year 2003 to 38 minutes in the year
2004. This reduction reflects significant improvement in the performance of the electricity
supply in a high technology industrial park in the last few years.
Table 8 : SAIDI (Minutes/Customers/Year) of NUR Distribution Sdn. Bhd.
for the Year 2001 to 2004
17.3
Aug
Month
38.7
24.7
35.0
Jul
Year
SAIDI (Minutes)
2001
2002
2003
2004
627
189
135
38
25.6
Jun
28.6
May
30.9
Apr
32.9
32.1
Mar
15.5
43.4
46.3
20.9
Feb
26.8
26.0
Jan
37.2
0
100
200
300
400
500
SAIDI
2003
50
2004
51
Figure 31 : SAIDI (Minutes/Customer/Year) of NUR Distribution for the Year
Gambarajah
312004
: Indeks SAIDI (Minit/Pelanggan/Tahun) NUR
2003 and
Table 9 shows a comparison of the SAIDI of TNB, SESB, SESCO, and NUR with several utilities
in other countries. It can be seen that over the years the SAIDI of the utilities in Malaysia had
improved and are comparable with the utilities in the same region. Nevertheless, the SAIDI of
SESB had increased showing a decline in performance.
Distribution Sdn. Bhd Pada Tahun 2003 dan 2004
Table 9 : SAIDI for the Supply System of TNB, SESB, SESCO, NUR and Other Utilities
38.0
SAIDI ( Jan-Dec)
Utilities
Year
SAIDI (Minutes/Customers/Year)
TNB, Semenanjung Malaysia
2001
2002
2003
2004
266
128
168
129
SESB, Sabah
2001
2002
2003
2004
2,279
1,779
1,729
2,594
SESCO, Sarawak
2001
2002
2003
2004
731
610
418
325
NUR
2001
2002
2003
2004
627
189
135
38
Victoria, Australia
2002
2003
151
161
South Australia
2002
2003
2004
143
179
159
New Zealand
2001
2002
2003
124
111
148
Metropolitan Electricity Authority, Thailand
1999
2000
2001
72
66
100
Provincial Electricity Authority, Thailand
1999
2000
2001
1,298
1,188
1,050
United Kingdom (England & Wales)
2002
2003
2004
83.7
86.2
82.6
135.4
Dec
0.03
0.05
Nov
0.27
0.70
Oct
0.25
1.67
Sept
3.07
0.55
0.12
Month
Aug 0
Jul
0.22
0.25
22.05
Jun
May
11.61
1.59
0
4.93
Apr
Mar
Feb
Jan
61.66
0.17
1.07
5.32
0.16
0
0.00
57.64
50.00
100.00
150.00
SAIDI
2003
52
2004
53
5.6
Causes of Electricity Supply Interruptions
5.6.1
Causes of Interruptions - TNB
The main causes of unscheduled electricity supply interruptions in Peninsular Malaysia for the
year 2002 to 2004 are as shown in Table 10. For the year 2004 the number of unscheduled
interruptions had increased to 52,514 from 26,075 in the year 2003. Out of the total number
unscheduled interruptions, 18,192 interruptions or 34.6% was due to nature related events.
Table 10 : Causes of Unscheduled Electricity Supply Interruptions in Peninsular Malaysia from
Unscheduled Causes
of Interruptions
54
It can be seen that in the last 4 years, the major causes of electricity supply interruptions were
due to nature-related events. This is followed by miscellaneous causes (21.0%), equipment
failures (15.5%) and overloading (13.1%) respectively.
Figure
32 : Causes
of Unscheduled
Electricity
Supply
32 : Jumlah
Punca-Punca Gangguan
Bekalan
Elektrik Tidak
Gambarajah
Berjadual di Negeri Sabah Untuk Tempoh (2001-2004)
Interruptions in Peninsular Malaysia from the Year
2001 to 2004
29,332
(21.0%)
Number of Interruptions
2000
2001
2002
2003
2004
Natural Disasters (wind, storm,
flood, land slides, etc.)
18,268
(37.6%)
13,914
(38.3%)
7,953
(31.9%)
8,575
(32.9%)
18,192
(34.6%)
Inferior Workmanship
6,198
(12.8%)
5,038
(13.9%)
3,192
(12.8%)
-
-
Overloading
5,106
(10.5%)
4,243
(11.7%)
4,953
(19.8%)
4,429
(17.0%)
4,706
(9.0%)
Incorrect Operation / Settings
91
(0.2%)
72
(0.2%)
26
(0.1%)
-
-
Equipment Failures
8,582
(17.7%)
5,798
(16.0%)
2,312
(9.3%)
2,626
(10.1%)
10,942
(20.8%)
Caused by Third Parties
4,050
(8.3%)
3,045
(8.4%)
2,754
(11.0%)
3,199
(12.3%)
4,536
(8.6%)
Miscellaneous
6,266
(12.9%)
4,185
(11.5%)
3,763
(15.1%)
7,246
(27.8%)
14,138
(26.9%)
Total
48,561
36,295
24,953
26,075
52,514
13,534
(9.7%)
Total of Interruptions
: 139, 837
48,634
(34.8%)
21,678
(15.5%)
98
(0.1%) 18,331
(13.1%)
8,230
(5.9%)
Natural Disasters (wind, storm, flood, land slides, etc)
Overloading
Incorrect Operation/Settings
Equipment Failures
Miscellaneous
55
5.6.2
Causes of Interruptions - SESB
The causes of unscheduled electricity supply interruptions reported in SESB's system in Sabah
in the year 2000 to 2004 are as shown in Table 11. For the year 2004, the unscheduled
interruptions increased by 54.6% to 14,236 from 9,208 in the year 2003. Out of the total
unscheduled interruptions, 5,924 interruptions or 41.6% were caused by miscellaneous
causes.
For SESB, in the last 4 years, the major causes of electricity supply interruptions were due to
nature-related events (50.3%) and miscellaneous causes (29.7%). This is followed by
interruptions overloading (5.8%), equipment failures (5.3%), damages by third parties (5.3%)
and inferior workmanship (0.1%).
Figure 33 : Causes of Unscheduled Electricity Supply Interruptions in
Sabah for the Year 2001 to 2004
Table 11 : Causes of Unscheduled Electricity Supply Interruptions in SESB's System from
Unscheduled Causes
of Interruptions
Number of Interruptions
2000
2001
2002
2003
2004
Natural Disasters (wind, storm,
flood, land slides, etc.)
6,242
(68.1%)
5,935
(64.4%)
4,668
(55.4%)
4,533
(49.2%)
5,513
(38.7%)
986
(10.8%)
718
(7.8%)
231
(2.7%)
257
(2.8%)
284
(2.0%)
Overloading
196
(2.1%)
339
(3.7%)
337
(4.0%)
646
(7.0%)
1,074
(7.5%)
Equipment Failures
439
(4.8%)
564
(6.1%)
413
(4.9%)
485
(5.3%)
706
(5.0%)
348
(3.8%)
432
(4.7%)
442
(5.2%)
553
(6.0%)
735
(5.2%)
Miscellaneous
956
(10.4%)
1,226
(13.3%)
2,332
(27.7%)
2,734
(29.7%)
5,924
(41.6%)
9,167
9,214
8,423
9,208
14,236
Total
56
: 41,081
Overloading
Equipment Failures
Miscellaneous
57
5.6.3
Causes of Interruptions - SESCO
In the year 2004, 2,266 interruptions or 69.0% of the total unscheduled interruptions in
Sarawak were due to miscellaneous causes. This was followed by interruptions due to
equipment failures (21.2%), damages by third parties (5.7%), natural disasters (3.0%) and
incorrect operation/settings (1.0%). Table 12 shows the causes of unscheduled electricity
supply interruptions in SESCO's system in Sarawak in the year 2003 and 2004.
Table 12 : Causes of Unscheduled Electricity Supply Interruptions in SESCO's system for the
Year 2003 and 2004
Unscheduled Causes of Interruptions
2004
Natural Disasters (wind, storm, flood, land slides, etc.)
95
(2.9%)
100
(3.0%)
Incorrect Operation / Settings
17
(0.5%)
34
(1.0%)
Equipment Failures
766
(23.3%)
696
(21.2%)
173
(5.3%)
187
(5.7%)
Miscellaneous
2,230
(68.0%)
2,266
(69.0%)
3,281
3,283
58
Figure 34 : Causes of Unscheduled Electricity Supply Interruptions in
Sarawak for the Year 2003 to 2004
: 6,564
Number of
Interruptions
2003
Total
Equipment Failures
Miscellaneous
59
5.6.4
Causes of Interruptions - Other Electricity Distributors
For NUR Distribution Sdn. Bhd., from the year 2002 to 2004, the major causes of electricity
supply interruptions were due to equipment failures (30.5%), inferior workmanship (29.5%)
and overloading (16.8%). This is followed by damages by third parties (9.5%), natural
disasters (7.4%), incorrect operation/settings (4.2%) and miscellaneous causes (2.1%).
Apart from the TNB and SESB, the causes of unscheduled electricity supply interruptions as
reported by other electricity distribution licensees in Peninsular Malaysia are as shown in Table
13.
Table 13 : Causes of Unscheduled Electricity Supply Interruptions Reported by Electricity
Distribution Licensees Apart from TNB and SESB for the Year 2002 to 2004
Malaysia
Airports
(Sepang)
Sdn Bhd
2002
2003
2004
2002
2003
2004
2002
2003
2004
2002
2003
2004
NUR
Distribution
Sdn. Bhd.
2004
K.K.I.P
Power
Sdn. Bhd.
2003
Petronas
Gas Berhad
(CUF Kerteh)
2002
Unscheduled
Causes of
Interruptions
Figure 35 : Causes of Unscheduled Electricity Supply Interruptions of
NUR Distribution Sdn. Bhd. for the Year 2002 to 2004
Petronas
Gas
Berhad
(CUF
Gebeng)
Natural Disasters
(wind, storm,
flood, land slides,
etc.)
0
0
0
0
0
0
0
0
0
0
0
0
0
4
3
Equipment Failures
0
0
0
0
0
0
0
0
0
0
0
0
9
12
8
Overloading
0
0
0
0
0
0
0
1
0
0
0
0
4
4
8
Incorrect Operation /
Settings
0
0
0
0
0
0
0
0
0
0
0
0
1
2
1
0
0
0
0
0
0
0
0
0
0
0
0
9
6
13
Caused by Third
Parties
0
0
0
1
0
0
0
0
0
0
0
16
3
0
6
Miscellaneous
2
0
1
0
0
0
0
0
0
7
1
0
2
0
0
Total Number
2
0
1
1
0
0
0
1
0
7
1
16
28
28
39
60
: 95
Equipment Failures
Overloading
Miscellaneous
61
No. of Incidents
6.0
Voltage Quality
Voltage quality refers to the characteristics of the supply voltage relating to the frequency,
magnitude, waveform and symmetry of the phases. This report presents the numbers of
complaints on the voltage violations and power quality problem received by the Energy
Commission.
Figure 37 shows the number of overvoltage incidents as reported in various states in
Peninsular Malaysia and Sabah in the year 2003 and 2004. In the year 2004, Perak recorded
the highest number i.e. 28 incidents or 30.0%
Yearof the total number of incidents. Among the
causes of overvoltage incidents were loose neutral connection in aerial lines, lack of
maintenance, deficiency in connection accessories and others.
Figure 37 : Number of Incidents of Overvoltage Reported in Various State in
Peninsular Malaysia and Sabah in 2003 and 2004
Incidents of Overvoltage
In the year 2004, the number of overvoltage incidents reported to the Energy Commission had
slightly increased to 94 incidents from the 91 incidents in the year 2003. The numbers of
complaints on overvoltage in Peninsular Malaysia for the year 2004 and the last few years are
as shown in Figure 36.
No. of Incidents
6.1
Sandakan
K. Kinabalu
Terengganu
Kota Bharu
Kuantan
Johore
Perak
Perlis
Kedah
Penang
N. Sembilan
Malacca
Selangor
No. of Incidents
W.P. Kuala Lumpur
Figure 36 : Number of Compliants on Overvoltage Reported for the
Year 2000 to 2004
State
Year
62
63
Ke
da
h
Ke
la
nt
an
W
.P.
Pe
Ku
ra
al
k
a
Lu
m
pu
r
Ne
Jo
ge
ho
ri
Se re
m
bi
la
n
Se
la
To
ng
ta
or
lI
nc
id
en
ts
s A or
ffe
ct
ed
n
om
er
er
iS
Se
la
bi
ng
la
or
e
em
r
st
To
t
al
Cu
pu
Jo
h
Ne
g
m
Lu
Pe
ra
k
la
W
.P.
Ku
a
an
Te
g
re
ng
ga
nu
Ke
da
h
Ke
la
nt
an
monitoring power quality problems in major industrial areas and strategic locations.
ca
ii)
Pa
h
publishing a guide book on power quality to provide information to the customers
on power quality and the measures to mitigate the problems;
g
i)
ac
In order to increase the awareness on power quality issues as well as assisting the industrial
customers to mitigate the problem, TNB has set up a special unit to provide advisory services
to the customers. Among the various initiatives taken by TNB are:
Figure 39 : Number of Customers in Major Industrial Estates
Affected by Voltage Dips in the Year 2002, 2003 and 2004
al
In the year 2004, the total number of voltage dip incidents as recorded in some major
industrial areas had decreased by 3.7% to 129 from 134 in the previous year. However, the
number of consumers affected had slightly increased to 251 in the year 2004 from 247 in the
year 2003. Figure 39 shows the number of customers in the major industrial areas in
Peninsular Malaysia affected by voltage dips in the last 3 years.
Industrial Areas
M
Supply reliability, in particular frequency and duration of power supply interruptions, remains
the primary determinant of quality of supply. Nevertheless, the impact of voltage dips, surges
and voltage waveform distortion in the supply network will have detrimental effect to the
industrial and commercial customers. Incidents of voltage dips often cause interruptions to
industrial process resulting in loss of production to the manufacturing industry. Over the years,
voltage dips have been a major concern to industrial and commercial customers in Malaysia.
Among the causes of the dips are transmission system trippings, faults on the supply system,
transient faults, connection or switching of large loads, lightning and others. The numbers of
incidents of voltage dip as recorded by TNB in the major industrial areas in Peninsular Malaysia
are as shown in Figure 38.
Pe
na
ng
M
al
ac
ca
Pa
ha
Te
ng
re
ng
ga
nu
Voltage Dips in TNB's Supply System
an
6.2.1
Pe
n
Power Quality Problems
No. of Customers
Affected Reported
6.2
No. of Incidents Reported
Figure 38 : Number of Voltage Dips Incidents Reported in Major Industrial Estates
in Peninsular Malaysia in the Year 2002, 2003 and 2004
Industrial Areas
64
65
6.2.2
Figure 41 : Number of Voltage Dip Incidents in Kulim Hi-Tech Park in the
Year 2002, 2003 and 2004
Voltage Dips in NUR's Supply System
No. of Incidents
Kulim Hi-Tech Park (KHTP), as a high technology industrial area, requires high quality of
electricity supply. As such the electricity distributor NUR Distribution Sdn. Bhd., is continuously
monitoring the quality of supply in the park using SCADA to provide better services to the
customers.
Figure 40 shows the numbers of incidents of voltage dip affecting the operation of the major
industrial customers in Kulim Hi-Tech Park (KHTP) in the last 4 years. Figure 41 and Figure 42
shows the number of voltage dip incidents and the number of customers affected by the dips
in the year 2004 compared with the previous 2 years.
Jan
Feb
Mar
Apr
May
Jun
Figure 40 : The Number of Voltage Dip Incidents Affecting the Operations of the Major Industrial
Customers in KHTP
Oct
Nov
Dec Total
Incidents
Total
Figure 42 : Number of Customers in Kulim Hi-Tech Park Affected by Voltage Dips
in the Year 2002, 2003 and 2004
13
12
8
7
7
7
7
3
4
4
5
3
2001
2002
2003
2004
BCM
LKT
TEchno-Centre
Consumers
MERCK
Fujimi
Wong
Showa
Toyo
NSCE
Hamadatec
Entegris
Celestica
AIC
Fuji
ADT
Intel
0
No. of Customers Affected
1
1
1
1
1
2
2
2
2
3
4
4
4
4
4
4
4
4
5
5
6
6
6
7
8
8
8
8
9
10
Jan
Feb
Mar
Apr
May
Jun
Jul
Total
66
Sept
13
15
14
13
13
12
12
12
Silterra
No. of Incidents
16
14
Aug
17
18
Jul
Aug
Sept
Oct
Nov
Dec Total
Customers
Affected
67
Figure 43 shows the numbers of incidents of voltage dip originating from the TNB's
transmission system and those from the local NUR's distribution system in the last 4 years. It
can be seen that most of the voltage dips in KHTP was originated from the transmission
system.
Figure 44 : Incidents of Voltage Dips in KHTP for the Year 2001 Plotted
on the SEMI F47 Curve
The SEMI F47 - 1999 standard (Specifications for Semiconductor Processing Equipment
Voltage Sag Immunity) is a guideline established by the electronic industry to determine the
responsibility of the supply company or the consumers in handling the voltage dip problem.
The SEMI F47 scattered plots of the incidents of voltage dips in the year 2001, 2002, 2003
and 2004 are as shown Figure 44, Figure 45, Figure 46 and Figure 47 respectively. Figure 48
shows the numbers of voltage dip incidents which are below 70% magnitude of the nominal
supply voltage in KHTP and in others countries in the last 4 years, while Figure 49 shows the
numbers of voltage dip incidents in KHTP below the SEMI F47 curve.
External Causes
Internal Causes
No. of Incidents
Figure 43 : Incidents of Voltage Dips Affecting Consumers in KHTP
Year
External (Originated from TNB’s Transmission System)
Internal (Originated from NUR’S Distribution System)
Internal Causes
External Causes
68
69
Internal Causes
External Causes
Figure 48 : SARFI70 of NUR and Others
Internal Causes
External Causes
Internal Causes
External Causes
Figure 49 : SARFI SEMI F47 of NUR
NUR - 2001
Internal Causes
External Causes
NUR - 2002
NUR - 2003
NUR - 2004
Internal Causes
External Causes
N.B: Most of the incidents originated from transmission system of TNB
70
71
E. QUALITY OF SERVICE
7.0
Quality of Service
Table 14 : Number and Types of Complaints Received by the Energy Commission in the Year
2003 and 2004
This section covers the performance of customer services of TNB, SESB and NUR, result of the
surveys on customer satisfaction and statistics of complaints received by the Commission.
Complaints on Services
No. of Complaints Received
Issues
7.1
Annual Performance Report on Customer Services
Under the licence conditions, TNB, SESB and NUR are required to submit annual reports on
performance of customer services to the Energy Commission. These reports cover 15 types of
services. The performance of the three utilities for the last few years are as shown in Appendix
1, II and III. Based on the reports submitted by TNB, SESB and NUR, it can be seen that the
overall performance in customer services of the utilities is improving.
7.2
Complaints Received by the Energy Commission
2003
2004
Application and connection of
electricity supply
11
19
Tariff and charges
17
13
Electricity billing, metering,
disconnection and reconnection
of supply
7
10
Safety of installations
23
18
Encroachment into the transmission
line wayleave or damage to TNB
installations by third parties
13
10
A total of 201 complaints were received by the Energy Commission in the year 2004. Most of
the complaints were received through the Commission's regional offices and the website.
Public lighting, other matter on
supply and customer services
19
16
Table 14 shows the number and types of complaints received in the year 2003 and 2004.
TOTAL
90
86
Various efforts were taken by the Energy Commission to resolve the complaints such as
investigation into the complaints, having meetings with the relevant parties and issuing
directives to the utilities etc.
Complaints on Supply
Electricity Supply Interruptions
27
15
Overvoltage
91
94
Power quality (dips, surges etc)
4
6
122
115
TOTAL
72
73
7.3
No. of Complaints
Figure 50 : Statistics of Complaints of Electricity Supply Services Reported in
Various States in Peninsular Malaysia in the Year 2003 and 2004
In the year 2004, a customer survey was carried by Energy Commission on the satisfaction level
of the services provided by TNB. NUR Distribution Sdn Bhd had also conducted a similar survey
in KHTP to gauge the satisfaction level of its customers.
or
e
Ku
an
ta
n
Ko
ta
Bh
a
Te
ru
re
ng
ga
Ko
nu
ta
Ki
na
ba
lu
Customer Satisfaction Level of TNB
The survey was carried out for about 6 month from July to December 2004 and a total of
1,065 responses were received. Of the total responses received, 512 responses were from
domestic customers while 553 responses were from industrial/commercial customers. The
results of the survey is as shown in Table 16.
Jo
h
lis
Pe
ra
k
ah
Pe
r
Ke
d
n
la
an
g
Pe
n
bi
Ne
ge
r
iS
em
al
ac
ca
go
r
M
la
n
Se
la
Lu
m
pu
r
7.3.1
W
.P.
Ku
a
Survey On Customer Satisfaction Level
Table 16 : Percentage of Customers Satisfied with the Services of TNB
State
Percentage of Responses of Satisfied Customers
Scope of Survey
Overall
Domestic
Industrial / Commercial
Reliability of supply
79.9%
77.1%
82.5%
Customer Services
84.9%
81.7%
86.8%
Infomation about electricity supply
interruptions
79.8%
78.0%
81.6%
Meter and billing
90.7%
89.5%
91.8%
Street lighting
70.5%
70.5%
-
Safety
67.0%
67.0%
-
Other issues on supply
77.4%
-
77.4%
Percentage (%) of Responses
Table 15 : Status of Resolution of Complaints in the Year 2004
74
Services
Supply
No. of Cases resolved
95
93
No. of Cases not Resolved Yet
6
7
101
100
Commercial
Domestic
Total Cases
Overall
Industrial
Customer Categories
75
B
Te
re
ng
Ko
ta
Ki
na
Ku
a
Ko
ta
P
Jo
P
Ke
Pe
em
Ne
ge
r
iS
a
M
al
Lu
Se
l
W
.P.
Ku
al
a
State
Figure 51 : Survey of NUR Distribution Customers
Customer Satisfaction Level of NUR Distribution Sdn. Bhd.
Percentage (%) of Responses
7.3.2
NUR Distribution Sdn. Bhd. had conducted the survey between 11th March and 15th April
2004 by distributing the survey forms to its industrial, commercial and domestic customers. A
total of 153 responses were received out of 1,501 survey forms distributed. The number of
response from each category of customers are as shown in Table 17.
Table 17 : Number of Responses Received by NUR Distribution Sdn. Bhd. in the year 2004
Customer Categories
No. of Responses Received
Overall
Industrial
17
Commercial
17
Domestic
119
Industrial
Commercial
Domestic
Customer Categories
Satisfied
Dissatisfied
Don’t Know
Figure 18 : Percentage of Customers Satisfied with the Services of NUR Distribution
Total
153
Percentage of Responses of Customers Satisfied
with the Services
Activities
Figure 51 and Table 18 show the summary of the results of the customer survey.
76
Overall
Industrial
Commercial
Domestic
Reliability and quality of supply
76.1%
44.1%
91.2%
78.6%
Meter reading, billing and refund of deposit
66.2%
61.8%
76.5%
65.3%
Notice of electricity supply interruptions
69.9%
76.5%
70.6%
68.9%
Application of connection and timelines of
connection of supply
59.8%
41.2%
64.7%
61.8%
Handling of breakdown complaint of supply
60.8%
67.7%
73.5%
58.0%
Tariff and charges
62.1%
64.7%
70.6%
60.5%
Condition of utility’s installation
72.6%
76.5%
76.5%
71.4%
Advice and customer eduction
72.6%
64.7%
64.7%
74.8%
Customer services
78.1%
94.1%
82.4%
75.2%
77
F. ELECTRICITY PRICES
8.0
Electricity Prices
In the year 2004, the average electricity prices of TNB, SESB and SESCO were 23.5 sen/kWh,
25.3 sen/kWh and 26.5 sen/kWh respectively.
8.1
Electricity Prices of TNB, SESB, SESCO and Other Utilities
The average selling prices of TNB, SESB and SESCO in 2004 compared with some countries in
this region are as shown in Table 19 and Figure 52 to Figure 56. The average prices in Table
19 were derived from total units of energy sold and total revenue from sales of electricity for
the period from January to December 2004 after taking into consideration the currency
exchange rates.
Table 19 : Average Selling of Electricity in Malaysia and Some Countries in
Asia in the year 2004
Utility /
Country
Domestic
(sen/kWh)
Commercial
(sen/kWh)
Industrial
(sen/kWh)
Public Lighting
(sen/kWh)
Overall
(sen/kWh)
TNB
23.3
27.5
21.5
15.6
23.5
SESB
22.4
29.0
23.5
29.1
25.3
SESCO
31.1
32.1
19.1
47.1
26.5
Singapore
36.9
35.7
31.8
N/A
35.9
Thailand
27.8
29.0
24.6
N/A
27.0
Indonesia
23.6
29.3
23.7
N/A
24.6
Philippines
41.9
43.1
36.8
35.8
40.9
Korea
30.5
30.6
20.1
21.8
24.9
Hong Kong*
42.2
47.2
32.7
N/A
42.9
Taiwan
28.5
29.0
19.7
11.1
23.4
Japan
77.3
57.4
57.4
30.0
65.8
Nota :
78
(*)
January to June 2004
(N/A) Not Available
79
Figure 52 : Comparison of Average Selling of Electricty for
Domestic Customers in the Year 2004
Figure 54 : Comparison of Average Selling Prices of Electricty
for Industrial Customers in the Year 2004
Country
Japan
Hong Kong*
Philippines
Singapore
Korea
Taiwan
Indonesia
Thailand
SESCO
Country
for Commercial Customers in the Year 2004
Japan
Philippines
Singapore
Hong Kong*
Country
Korea
Taiwan
Indonesia
Thailand
SESCO
SESB
Japan
Hong Kong*
Philippines
Singapore
Korea
Taiwan
Indonesia
Thailand
SESCO
SESB
TNB
TNB
Sen per kWh
for Street Lighting in the Year 2004
Sen per kWh
Country
80
SESB
TNB
Japan
Hong Kong*
Philippines
Singapore
Korea
Taiwan
Indonesia
Thailand
SESCO
SESB
TNB
Sen per kWh
Sen per kWh
81
CONCLUSIONS
The overall performances of the electricity supply services of the utilities in Malaysia have
improved over the years.
Figure 56 : Comparison of Average Selling Prices of
Electricty in the Year 2004
7
In the year 2004, the SAIDI of TNB, SESCO and NUR Distribution had reduced even though the
number of interruptions had increased. This is due to improvement in time taken for restoration
of supply. The number of voltage dip incidents had dropped compared with the previous year.
35.9 40.9 42.9
Nevertheless, efforts must be taken by the utilities to improve asset management, to reduce
response time for restoration of supply and to undertake appropriate measures to mitigate the
problem of voltage dips faced by the industrial sector.
Japan
Hong Kong*
Philippines
Singapore
Korea
23.4 24.9
Taiwan
Indonesia
Thailand
SESCO
SESB
26.5 27.0
23.5 25.3
24.6
TNB
Sen per kWh
65.8
Country
____________________________________________________________________
Prepared by : Electricity Supply Department
Energy Commission
82
83
Performance Performance Performance Performance Performance Performance
in 1998/99
in 1999/00
in 2000/01
in 2001/02
in 2002/03
in 2003/04
Details
APPENDIX I
REPORT ON THE PERFORMANCE OF CUSTOMER SERVICES OF
TNB FOR FINANCIAL YEARS 1998/99 TO 2003/04
1. Connection of
Electricity Supply
A. Change Of Consumers
No. of applications
109,485
114,309
119,724
124,302
127,648
131,723
86%
96%
99%
100%
99%
97%
177,983
168,827
201,894
217,289
248,267
247,984
84%
95%
99%
100%
99%
96%
No. of applications
7,263
2,348
2,007
4,795
8,929
12,174
Percentage connected
73%
92%
99%
100%
98%
100%
146,120
108,903
95,737
145,915
120,936
106,819
89%
93%
97%
100%
99%
100%
within 2 working days
B. New Supply
(Low Voltage)
i) Individual
Applications Under
Normal Conditions
No. of applications
after appointment for
testing installation
ii) Individual
Applications Under
Abnormal Conditions
within 2 weeks after
appointment for testing
installation
iii)Bulk Supply
Application And
Housing Schemes
No. of applications
within 1 month after
appointment for testing
installation
85
Details
in 1998/99
in 1999/00
in 2000/01
in 2001/02
in 2002/03
in 2003/04
in 1998/99
in 1999/00
in 2000/01
in 2001/02
in 2002/03
in 2003/04
Details
5. Meter Reading
2. Supply Restoration
After Breakdowns
No. of consumers with
i)
estimated readings exceeding
Reports
No. of consumers who
1,895,558
1,479,752
1,666,775
1,243,326
1,114,240
1,156,186
53%
67%
90%
94%
82%
84%
Percentage of such
515,062
407,390
420,870
360,160
355,318
52%
89%
97%
96%
97%
97%
8,116
5,057
5,799
4,659
5,067
7,009
86%
93%
99%
100%
100%
98%
36,126
20,861
26,314
37,735
35,694
29,145
64%
84%
98%
100%
99%
99%
17,965
16,454
14,183
10,099
6,645
10,057
85%
93%
98%
99%
100%
99%
3 consecutive months
Percentage of customers
have reported
754,529
with estimated readings
consumers being given
exceeding 3 consecutive
report numbers
months been given notice
ii) Minor Breakdowns
No. of minor breakdowns
82,796
63,925
66,818
67,405
66,321
84,203
Percentage of breakdown
85%
95%
97%
93%
96%
96%
6. Enquiries / Written
Complaints From
Consumers
rectified within 4 hours
i) Written enquiries
iii) Major/Extra Ordinary
including questions
Breakdowns
No. of major breakdowns
60,430
28,001
7,963
7,138
7,476
8,440
regarding accounts/bills
Percentage of restoration
84%
93%
91%
95%
99%
97%
No. of written complaints
received
Percentage being replied
3. Supply Reconnection
After Disconnection
No. of supply disconnections
1,002,946
1,009,243
998,659
990,354
983,017
654,946
No. of consumers paying bills
588,943
598,705
590,141
589,734
555,666
355,150
7. Complaints Through
Telephone
before 1:00 p.m. on
No. of complaints through
disconnection day
telephone which could not be
Percentage of supply
93%
98%
99%
99%
99%
100%
settled at the same
reconnection on the same day
moment
for those who paid the bills
Percentage of such complaints
before 1:00 p.m.
who were recontacted within
24 hours
4. Supply Interruptions Which
8. Appointment For Meter
Were Planned / Scheduled
No. of scheduled interruptions
13,122
11,634
15,774
8,969
6,673
8,831
Accuracy Check
Percentage of consumers given
69%
77%
92%
96%
95%
90%
No. of appointments for
meter accuracy check
24 hours notice
Percentage not given notice
6.8%
4%
1%
2%
2%
2%
Percentage of meter accuracy
check carried out within 2
working days
86
87
Details
in 1998/99
in 1999/00
in 2000/01
in 2001/02
in 2002/03
in 2003/04
9. Meter Replacement
No. of meters replaced
Percentage of meter
in 1998/99
in 1999/00
in 2000/01
in 2001/02
in 2002/03
in 2003/04
Details
13. Collection
324,487
403,654
257,245
179,413
275,353
97,935
85%
94%
98%
100%
100%
98%
replacement within 2
Percentage of consumers
61%
96%
100%
100%
97%
97%
14,017
17,991
6,726
12,045
6,077
1,714
7,197
17,158
5,696
11,544
3,854
1,103
853
136
989
35
317
609
5,967
697
41
466
1,906
2
466,789
347,659
335,277
378,933
365,494
235,338
444,017
346,996
329,762
364,269
353,168
211,032
22,644
657
5,098
12,422
12,323
22,136
128
6
417
2,242
3
2,170
who paid through the post
and proof of payment
working days
been send within 7
working days
10. Appointment With
Consumers
14. Supply Disconnection
i) For Appointments
i) With 24 hours Notice
Outside TNB Premises
Appointments where TNB
No. of disconnections due
77%
92%
96%
100%
100%
100%
to dangerous consumer
officers arrived not later
installations
than 30 minutes from the
agreed time.
to suspicion of theft of
ii) Postponement by TNB
Percentage of subsequent
electricity
22%
83%
96%
100%
99%
97%
appointment made within 2
to electricity meter being
working days
damaged
ii) Without Any Notice
11. Deposits
No. of consumers who were
1,787,972
881,863
42,513
30,476
26,955
28,239
to failure to pay the bills
found after 6 months that their
within 15 days after
deposits exceeded
issuance of bill
average consumption of 2
months
to failure to pay additional
Percentage of such consumers
56%
84%
96%
100%
100%
94%
deposits within 7 days
who had the excess deposits
from the date of notice.
returned.
No. of disconnections of
installations which were
12. Refund of Consumer
dangerous.
Deposits
No. of consumers who
80,277
80,086
86,041
82,097
94,041
87,330
83%
94%
99%
99%
98%
97%
forwarded all required
documents for refund of
deposits
Consumers who had their
deposits refunded within
2 months
88
89
Details
15. Special Consumers Who
in 1998/99
in 1999/00
in 2000/01
in 2001/02
in 2002/03
in 2003/04
1,445
410
501
436
448
599
Face Problems In Paying
Electric Bills
No. of handicapped consumers
963
31
55
48
40
65
167
64
79
64
56
77
129
91
141
150
164
195
186
224
226
174
188
262
who appealed to avoid
disconnection.
No. of senior consumers who
appealed to avoid
disconnection.
No. of handicapped consumers
who were assisted in payment
of bills.
No. of senior consumers who
were assisted in payment of
bills.
90
APPENDIX II
SESB FOR FINANCIAL YEARS 2000/01 TO 2002/03
Details
Performance Performance Performance
in 2000/01
in 2001/02
in 2002/03
Details
Percentage of supply reconnection on the same day
1. Connection of Electricity Supply
in 2000/01
in 2001/02
in 2002/03
96%
98.8%
48.3%
for those who Paid the bills before 1:00 p.m.
A. Change of Consumers
No. of applications
4,388
6,240
6,401
Percentage connected within 2 working days
97.8%
91.3%
85.9%
4. Supply Interruptions Which Were Planned / Scheduled
B. New Supply (Low Voltage)
Percentage of consumers given 24 hours notice
i) Individual Applications Under
521
449
802
89.8%
93.6%
100%
4,194
11,614
8,389
21.7%
26.2%
25.5%
Normal Conditions
No. of applications
6,543
8,461
14,166
Percentage connected within 4 working days after
84.1%
94.7%
71.7%
appointment for testing installation
Percentage of customers with estimated readings exceeding
3 consecutive months been given notice
Abnormal Conditions
Percentage connected within 2 weeks after
39
35
N/A
64.1%
85.7%
N/A
regarding accounts/bills
iii) Bulk Supply Application And Housing Schemes
Percentage connected within 1 month after
6. Enquiries / Written Complaints From Consumers
i) Written enquiries including questions
No. of applications
No. of consumers with estimated readings exceeding 3
consecutive months
ii) Individual Applications Under
No. of applications
5. Meter Reading
156
85.9%
2,437
99.9%
525
80%
No. of written complaints received
Percentage being replied within 7 working days
416
148
176
98.8%
91.9%
52.8%
190
304
1,246
93.2%
96.1%
15.9%
7. Complaints Through Telephone
No. of complaints through telephone which could not be
2. Supply Restoration After Breakdowns
settled at the same moment.
i) Reports
No. of consumers who have reported
Percentage of such consumers being given
38,305
94.7%
58,263
99.7%
149,172
100%
Percentage of such complaints who were recontacted within
24 hours.
report numbers
8. Appointment For Meter Accuracy Check
Percentage of breakdown rectified within 6 hours
8,139
85.1%
6,341
92.8%
8,597
100%
No. of appointments for meter accuracy check
Percentage of meter accuracy check carried out within
461
693
989
90.2%
95.4%
88.9%
7 working days.
iii) Major/Extra Ordinary Breakdowns
2,597
2,051
1,271
Percentage of restoration within 4 days
100%
100%
83.6%
3. Supply Reconnection After Disconnection
25,840
47,673
63,480
No. of consumers paying bills before 1:00 p.m.
9,360
25,379
30,674
No. of meters replaced
3,115
2,246
3,956
Percentage of meter replacement within 2 weeks
83.1%
87.2%
74.2%
on disconnection day
92
93
Details
in 2000/01
in 2001/02
in 2002/03
Details
No. of disconnections of installations which were dangerous
10. Appointment With Consumers
in 2000/01
in 2001/02
in 2003/04
2
0
14
7
34
24
35
53
51
8
42
23
34
39
30
i) For Appointments Outside TNB Premises
Appointments where TNB officers arrived not later than
94.2%
93.6%
95.9%
No. of handicapped consumers who appealed to avoid
ii) Postponement by TNB
Percentage of subsequent appointment made within
15. Special Consumers Who Face Problems In
Paying Electric Bills
the agreed time.
90.3%
100%
52.4%
disconnection.
No. of senior consumers who appealed to avoid
2 working days
disconnection.
No. of handicapped consumers who were assisted in
11. Deposits
No. of consumers who were found after 6 months that their
15
9
12,798
100%
100%
6.5%
No. of senior consumers who were assisted in payment
deposits exceeded average consumption of 2 months
Percentage of such consumers who had the excess deposits
payment of bills.
of bills
returned
Note : (N/A) Not Available
12. Refund of Consumer Deposits
No. of consumers who forwarded all required documents for
2,173
4,630
4,744
86.4%
86.7%
69.4%
46.8%
59.9%
58.6%
28,135
25,766
4,619
518
529
228
93
8
160
4,669
29,373
25,983
3
1
1,021
refund of deposits
Consumers who had their deposits refunded within 2 months
13. Collection
Percentage of consumers who paid through the post and
proof of payment been send within 7 working days
14. Supply Disconnection
No. of disconnections due to dangerous consumer
installations
No. of disconnections due to suspicion of theft of
electricity
No. of disconnections due to electricity meter being
damaged
No. of disconnections due to failure to pay the bills within
15 days after issuance of bill
No. of disconnections due to failure to pay additional
deposits within 7 days from the date of notice
94
95
Details
Performance Performance
in 2003
in 2004
APPENDIX III
1. Connection of Electricity Supply
NUR DISTRIBUTIONS SDN. BHD. FOR THE YEAR 2003 AND 2004
A. Change of Consumers
No. of applications
Percentage connected within 1 working day
9
17
100%
100%
B. New Supply (Low Voltage)
i) Individual Applications Under Normal Conditions
No. of applications
Percentage connected within 1 working day after appointment
351
221
100%
100%
for testing installation
ii) Bulk Supply Application And Housing Schemes
9
43
100%
100%
No. of consumers who have reported
N/A
N/A
Percentage of such consumers being given report numbers
N/A
N/A
No. of applications
Percentage connected within 1 weeks after appointment for testing
installation
2. Supply Restoration After Breakdowns
i) Reports
Percentage of breakdown rectified within 2 hours
20
27
75%
85%
iii) Major/Extra Ordinary Breakdowns
8
10
100%
90%
23
138
No. of consumers paying bills before 1:00 p.m. on disconnection day
23
136
100%
99%
Percentage of restoration within 24 hours
3. Supply Reconnection After Disconnection
Percentage of supply reconnection on the same day for those who
Paid the bills before 1:00 p.m
4. Supply Interruptions Which Were Planned / Scheduled
Percentage of consumers given 7 days notice
34
61
100%
90%
97
Details
Details
in 2003
in 2004
12.
5. Meter Reading
No. of consumers with estimated readings exceeding 2 consecutive months
54
140
Percentage of customers with estimated readings exceeding 2 consecutive
96.3%
99%
Percentage being replied within 5 working days
13.
Percentage of meter accurancy check carried out within 1 working day
2.5%
100%
N/A
No. of disconnections due to dangerous consumer installations
N/A
N/A
No. of disconnections due to suspicion of theft of electricity
N/A
N/A
No. of disconnections due to electricity meter being damaged
N/A
N/A
N/A
N/A
36
153
1
6
0
0
Collection
8
45
100%
100%
payment been send within 5 working days
14.
Supply Disconnection
8
45
100%
100%
No. of disconnections due to failure to pay bills within 15 days after
8. Appointment for Meter Accurancy Check
No. of appointments for meter accurancy check
100%
Percentage of consumers who paid through the post and proof of
same moment
Percentage of such complaints who were recontacted within 24 hours
79
Consumers who had their deposits refunded within 15 working days
7. Complaints Through Telephone
No. of complaints through telephone which could not be settled at the
19
of deposits
i) Written enquiries including question regarding accounts/bills
No. of written complaints received
Refund of Consumer Deposits
No. of consumers who forwarded all required documents for refund
months been given notice
6. Enquiries / Written Complaints From Consumers
in 2003
in 2004
1
9
100%
100%
issuance of bil
No. of disconnections due to failure to pay additional deposits
within 7 days from the date to notice
No. of disconnections of installations which were dangerous
No. of meter replaced
N/A
4
Percentage of meter replacement within 2 working days
N/A
100%
15.
Special Consumers Who Face Problems in Paying Electric Bills
The handicapped and senior consumers were assisted in payment of bills,
NUR will make special arrangegement or collect from consumers premises
10. Appointment With Consumers
i) For appointments Outside NUR Premises
No. of appointments where NUR officers arrived not less than 15
105
299
100%
100%
0
0
N/A
N/A
Nota : (N/A) Not Available
minutes from the agreed time
ii) Postponement by NUR
Percentage of subsequent appointment made within 1 working day
11. Deposits
No. of consumers who were found after 6 months that their deposits
exceeded average consumption of 2 months
Percentage of such consumers who had the excess deposits returned
98
99
Notes
Notes
Notes

Report on Performance of the Electricity Supply Services in Malaysia

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