A WA parliamentary question on notice regarding power outages in Sawyers Valley for 2006 and 2007, with detailed information provided by Western Power on frequency, duration, affected homes, and causes. The area is identified as part of the 'Top 40 Worst Feeders' program.

AnsweredQoN 3040Legislative Assembly
Asked
26 February 2008
Portfolio
Energy

QuestionView source ↗

(a) how many power outages this locality suffered during this period;
(b) the duration of the shortest and longest power outage;
(c) the average duration of outages affecting this locality;
(d) the greatest and lowest number of homes affected by these outages;
(e) the average number of homes affected by these outages; and
(f) the primary causes of these outages?

AnswerView source ↗

Answered
1 April 2008
Responded by
Minister for Energy
Response time
35 days
Western Power has provided the Minister for Energy with the following response.
The locality of Sawyers Valley is included in the Top 40 Worst Feeders program.
a) 2006 - 40 network outages
2007 - 50 network outages
b) 2006 - The shortest outage was 9 minutes and the longest was 9.2 hours.
2007 - The shortest outage was 1.8 minutes and the longest was 9.35 hours.
c) 2006 - The average duration of outages was 3.1 hours, and the median was 1.5 hours.
2007 - The average duration of outages was 2.6 hours, and the median was 1.5 hours.
d) 2006 - The highest number of homes affected was 295 and the lowest was 5.
2007 - The highest number of homes affected was 299 and the lowest was 4.
e) 2006 - The average number of homes affected by each outage was 108.
2007 - The average number of homes affected by each outage was 90.
f)  2006 - Primary causes of these outages were planned outages (15), unknown causes (12) and equipment failures (6).
2007 - The primary causes of these outages were unknown causes (12), planned outages (11), equipment failures (11) and lightning (6).
Notes:
All information provided was for the locality of Sawyers Valley supplied from all SWIS (South West Interconnected System) distribution feeders for both calendar years 2006 and 2007.
The definitions of the fault causes listed above are:
·
Planned outages
are when customers have been given a minimum of 3 days advance notice of the outage. Planned outages are generally as a result of doing improvement works on the network.
·
Equipment failure
is where the condition of the equipment results in equipment failing. This also includes pole top fire incidents.
· A fault cause is listed as
lightning
where it was determined that lightning/stormy weather condition had caused the fault.
· A fault cause is listed as
unknown
when the cause of the outage could not be determined.
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