❓ A WA parliamentary question seeks detailed data on power outages within the South West Interconnected Network (SWIN) and Western Power's reliability of supply performance in specific towns. The response provides some data and explanations, but refers to tabled papers for full outage details.
AnsweredQoN 1857Legislative Council
Asked
12 February 2019
Member
Portfolio
Mines and Petroleum; Energy; Industrial Relations
QuestionView source ↗
(1) I refer to unplanned power outages within the South West Interconnected Network (SWIN) from 1 January 2018 to date, and I ask? (2) For each Western Power sub-region within the SWIN please provide: (a) the number of outages; (b) the locations affected by each outage; (c) the number of connections affected by each outage; (d) the duration of each outage; (e) the reason for the outage if known; and (f) the number of extended outage claims made with respect to each outage and the total cost of each outage event? (3) With respect to the Service Standard Benchmarks and Service Standard Targets in relation to ‘Reliability of Supply’ please identify the benchmark, target and actual performance for the following towns: (a) Bindoon; (b) Wannamal; (c) Mullewa; (d) Kalbarri; (e) Kulin; (f) Morawa; (g) Perenjori; and (h) Gingin? (4) Please identify the towns or localities where Western Power is not meeting its required benchmarks or targets for reliability of supply within the regional SWIN?
AnswerView source ↗
Answered
2 April 2019
Responded by
Minister for Regional Development representing the Minister for Mines and Petroleum; Energy; Industrial Relations
Response time
12 days
(1)
(2) (a) – (e) See tabled paper no .]
Western Power recognises all outages are inconvenient to customers, however any single outage with less than 3,000 customers impacted is considered within normal fault levels, hence the difference in reporting.
In regard to (d), please note that not all customers are without power for the time reported. The maximum outage time marks the completion of the fault. Customers may be ‘backfed’ and have power while work is being completed.
(f) Western Power does not keep records in this format. However, a total of 15,800 Extended Outage Payment applications were made in the 2018 calendar year, at a total cost of $1,264,000.
(3) (a) - (h) See below tables which provide performance data for the last 5 years and show that interruption frequency and duration vary significantly from year to year across the towns.
The supply of electricity for regional customers is a continuing challenge due to the vast distances, terrain and environmental conditions that the predominantly overhead power lines are exposed to.
The February 2019 Benchmark and Target included in the below table is based on Access Arrangement 4 figures, to be applied from 2018/19 onwards.
Locality
System Average Interruption Duration Index
System Average Interruption
Frequency Index
System Average Interruption Duration Index Score
Benchmark (848.3) Met?
Target (677.7) Met?
System Average Interruption Frequency Index Score
Benchmark (5.7) Met?
Target (4.29) Met?
Bindoon
1,039
No
No
6.27
No
No
Gingin
548
Yes
Yes
8.19
No
No
Kalbarri
982
No
No
6.94
No
No
Kulin
560
Yes
Yes
5.86
No
No
Morawa
611
Yes
Yes
2.16
Yes
Yes
Mullewa
4,465
No
No
11.44
No
No
Perenjori
1,442
No
No
8.30
No
No
Wannamal
588
Yes
Yes
4.01
Yes
Yes
The February 2018 Benchmark and Target included in the below table is based on Access Arrangement 3 figures.
Locality
System Average Interruption Duration Index
System Average Interruption
Frequency Index
System Average Interruption Duration Index Score
Benchmark (724.7) Met?
Target (582.2) Met?
System Average Interruption Frequency Index Score
Benchmark (4.51) Met?
Target (4.06) Met?
Bindoon
704
Yes
No
4.59
No
No
Gingin
1,507
No
No
14.47
No
No
Kalbarri
2,515
No
No
12.29
No
No
Kulin
1,679
No
No
4.55
No
No
Morawa
421
Yes
Yes
3.09
Yes
Yes
Mullewa
796
No
No
2.96
Yes
Yes
Perenjori
1,423
No
No
12.5
No
No
Wannamal
3,897
No
No
13.49
No
No
The February 2017 Benchmark and Target included in the below table is based on Access Arrangement 3 figures.
Locality
System Average Interruption Duration Index
System Average Interruption
Frequency Index
System Average Interruption Duration Index Score
Benchmark (724.7) Met?
Target (582.2) Met?
System Average Interruption Frequency Index Score
Benchmark (4.51) Met?
Target (4.06) Met?
Bindoon
436
Yes
Yes
3.96
Yes
Yes
Gingin
456
Yes
Yes
3.11
Yes
Yes
Kalbarri
1,990
No
No
10.11
No
No
Kulin
150
Yes
Yes
1.93
Yes
Yes
Morawa
3,927
No
No
8.54
No
No
Mullewa
3,960
No
No
8.35
No
No
Perenjori
5,910
No
No
10.08
No
No
Wannamal
2,148
No
No
9.21
No
No
The February 2016 Benchmark and Target included in the below table is based on Access Arrangement 3 figures.
Locality
System Average Interruption Duration Index
System Average Interruption
Frequency Index
System Average Interruption Duration Index Score
Benchmark (724.7) Met?
Target (582.2) Met?
System Average Interruption Frequency Index Score
Benchmark (4.51) Met?
Target (4.06) Met?
Bindoon
268
Yes
Yes
4.76
Yes
No
Gingin
92
Yes
Yes
2.08
Yes
Yes
Kalbarri
1,214
No
No
4.22
Yes
No
Kulin
752
No
No
5.56
No
No
Morawa
378
Yes
Yes
2.32
Yes
Yes
Mullewa
985
No
No
4.29
Yes
No
Perenjori
1,407
No
No
5.72
No
No
Wannamal
221
Yes
Yes
4.32
Yes
No
The February 2015 Benchmark and Target included in the below table is based on Access Arrangement 3 figures.
Locality
System Average Interruption Duration Index
System Average Interruption
Frequency Index
System Average Interruption Duration Index Score
Benchmark (724.7) Met?
Target (582.2) Met?
System Average Interruption Frequency Index Score
Benchmark (4.51) Met?
Target (4.06) Met?
Bindoon
556
Yes
Yes
5.15
No
No
Gingin
535
Yes
Yes
11.25
No
No
Kalbarri
3,779
No
No
14.98
No
No
Kulin
1,704
No
No
7.65
No
No
Morawa
356
Yes
Yes
4.94
No
No
Mullewa
3,128
No
No
10
No
No
Perenjori
1,793
No
No
11.45
No
No
Wannamal
1,404
No
No
9.9
No
No
(4) Western Power does not routinely calculate System Average Interruption Duration and System Average Interruption Frequency for individual locations in a manner that the Member has requested, and to do so is onerous. Western Power is happy to provide advice on individual locations upon request.
(2) (a) – (e) See tabled paper no .]
Western Power recognises all outages are inconvenient to customers, however any single outage with less than 3,000 customers impacted is considered within normal fault levels, hence the difference in reporting.
In regard to (d), please note that not all customers are without power for the time reported. The maximum outage time marks the completion of the fault. Customers may be ‘backfed’ and have power while work is being completed.
(f) Western Power does not keep records in this format. However, a total of 15,800 Extended Outage Payment applications were made in the 2018 calendar year, at a total cost of $1,264,000.
(3) (a) - (h) See below tables which provide performance data for the last 5 years and show that interruption frequency and duration vary significantly from year to year across the towns.
The supply of electricity for regional customers is a continuing challenge due to the vast distances, terrain and environmental conditions that the predominantly overhead power lines are exposed to.
The February 2019 Benchmark and Target included in the below table is based on Access Arrangement 4 figures, to be applied from 2018/19 onwards.
Locality
System Average Interruption Duration Index
System Average Interruption
Frequency Index
System Average Interruption Duration Index Score
Benchmark (848.3) Met?
Target (677.7) Met?
System Average Interruption Frequency Index Score
Benchmark (5.7) Met?
Target (4.29) Met?
Bindoon
1,039
No
No
6.27
No
No
Gingin
548
Yes
Yes
8.19
No
No
Kalbarri
982
No
No
6.94
No
No
Kulin
560
Yes
Yes
5.86
No
No
Morawa
611
Yes
Yes
2.16
Yes
Yes
Mullewa
4,465
No
No
11.44
No
No
Perenjori
1,442
No
No
8.30
No
No
Wannamal
588
Yes
Yes
4.01
Yes
Yes
The February 2018 Benchmark and Target included in the below table is based on Access Arrangement 3 figures.
Locality
System Average Interruption Duration Index
System Average Interruption
Frequency Index
System Average Interruption Duration Index Score
Benchmark (724.7) Met?
Target (582.2) Met?
System Average Interruption Frequency Index Score
Benchmark (4.51) Met?
Target (4.06) Met?
Bindoon
704
Yes
No
4.59
No
No
Gingin
1,507
No
No
14.47
No
No
Kalbarri
2,515
No
No
12.29
No
No
Kulin
1,679
No
No
4.55
No
No
Morawa
421
Yes
Yes
3.09
Yes
Yes
Mullewa
796
No
No
2.96
Yes
Yes
Perenjori
1,423
No
No
12.5
No
No
Wannamal
3,897
No
No
13.49
No
No
The February 2017 Benchmark and Target included in the below table is based on Access Arrangement 3 figures.
Locality
System Average Interruption Duration Index
System Average Interruption
Frequency Index
System Average Interruption Duration Index Score
Benchmark (724.7) Met?
Target (582.2) Met?
System Average Interruption Frequency Index Score
Benchmark (4.51) Met?
Target (4.06) Met?
Bindoon
436
Yes
Yes
3.96
Yes
Yes
Gingin
456
Yes
Yes
3.11
Yes
Yes
Kalbarri
1,990
No
No
10.11
No
No
Kulin
150
Yes
Yes
1.93
Yes
Yes
Morawa
3,927
No
No
8.54
No
No
Mullewa
3,960
No
No
8.35
No
No
Perenjori
5,910
No
No
10.08
No
No
Wannamal
2,148
No
No
9.21
No
No
The February 2016 Benchmark and Target included in the below table is based on Access Arrangement 3 figures.
Locality
System Average Interruption Duration Index
System Average Interruption
Frequency Index
System Average Interruption Duration Index Score
Benchmark (724.7) Met?
Target (582.2) Met?
System Average Interruption Frequency Index Score
Benchmark (4.51) Met?
Target (4.06) Met?
Bindoon
268
Yes
Yes
4.76
Yes
No
Gingin
92
Yes
Yes
2.08
Yes
Yes
Kalbarri
1,214
No
No
4.22
Yes
No
Kulin
752
No
No
5.56
No
No
Morawa
378
Yes
Yes
2.32
Yes
Yes
Mullewa
985
No
No
4.29
Yes
No
Perenjori
1,407
No
No
5.72
No
No
Wannamal
221
Yes
Yes
4.32
Yes
No
The February 2015 Benchmark and Target included in the below table is based on Access Arrangement 3 figures.
Locality
System Average Interruption Duration Index
System Average Interruption
Frequency Index
System Average Interruption Duration Index Score
Benchmark (724.7) Met?
Target (582.2) Met?
System Average Interruption Frequency Index Score
Benchmark (4.51) Met?
Target (4.06) Met?
Bindoon
556
Yes
Yes
5.15
No
No
Gingin
535
Yes
Yes
11.25
No
No
Kalbarri
3,779
No
No
14.98
No
No
Kulin
1,704
No
No
7.65
No
No
Morawa
356
Yes
Yes
4.94
No
No
Mullewa
3,128
No
No
10
No
No
Perenjori
1,793
No
No
11.45
No
No
Wannamal
1,404
No
No
9.9
No
No
(4) Western Power does not routinely calculate System Average Interruption Duration and System Average Interruption Frequency for individual locations in a manner that the Member has requested, and to do so is onerous. Western Power is happy to provide advice on individual locations upon request.
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