❓ Mr. Simpson asks about power outages in Serpentine, Jarrahdale, Roleystone, and Mundijong. The response details outage causes, network characteristics, and Western Power's efforts to improve reliability, including specific outage statistics and planned upgrades.
AnsweredQoN 469Legislative Assembly
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(b) Serpentine; (c) Jarrahdale; (d) Roleystone; and (e) Mundijong?
(c) Jarrahdale; (d) Roleystone; and (e) Mundijong?
(d) Roleystone; and (e) Mundijong?
(e) Mundijong?
(b) Serpentine; (c) Jarrahdale; (d) Roleystone; and (e) Mundijong?
(c) Jarrahdale; (d) Roleystone; and (e) Mundijong?
(d) Roleystone; and (e) Mundijong?
(e) Mundijong?
1 While Western Power is able to list outages by suburb, it is important to understand that the electricity network is not suburb specific, and that: · An outage can affect just two properties or several thousand. Just because an outage is listed for, say, Serpentine, it does not mean everyone in Serpentine experienced that outage. · The duration of an outage will also differ for different customers. If Western Power can 'back feed' customers from elsewhere (by opening and closing switches) these customers will have a shorter outage than those who are close to the fault, who may have to wait until the fault has been repaired. · If an outage is listed for Byford, for example, it may have affected a part of Byford, as well as part of Mundijong and Jarrahdale. When listing outages by suburb, therefore, this one outage would appear three times. The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating. These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
· An outage can affect just two properties or several thousand. Just because an outage is listed for, say, Serpentine, it does not mean everyone in Serpentine experienced that outage. · The duration of an outage will also differ for different customers. If Western Power can 'back feed' customers from elsewhere (by opening and closing switches) these customers will have a shorter outage than those who are close to the fault, who may have to wait until the fault has been repaired. · If an outage is listed for Byford, for example, it may have affected a part of Byford, as well as part of Mundijong and Jarrahdale. When listing outages by suburb, therefore, this one outage would appear three times. The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating. These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
· The duration of an outage will also differ for different customers. If Western Power can 'back feed' customers from elsewhere (by opening and closing switches) these customers will have a shorter outage than those who are close to the fault, who may have to wait until the fault has been repaired. · If an outage is listed for Byford, for example, it may have affected a part of Byford, as well as part of Mundijong and Jarrahdale. When listing outages by suburb, therefore, this one outage would appear three times. The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating. These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
· If an outage is listed for Byford, for example, it may have affected a part of Byford, as well as part of Mundijong and Jarrahdale. When listing outages by suburb, therefore, this one outage would appear three times. The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating. These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating. These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
(a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
(b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
(c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
(d) Roleystone: 28 (e) Mundijong: 2
(e) Mundijong: 2
(c) Jarrahdale; (d) Roleystone; and (e) Mundijong?
(d) Roleystone; and (e) Mundijong?
(e) Mundijong?
(b) Serpentine; (c) Jarrahdale; (d) Roleystone; and (e) Mundijong?
(c) Jarrahdale; (d) Roleystone; and (e) Mundijong?
(d) Roleystone; and (e) Mundijong?
(e) Mundijong?
1 While Western Power is able to list outages by suburb, it is important to understand that the electricity network is not suburb specific, and that: · An outage can affect just two properties or several thousand. Just because an outage is listed for, say, Serpentine, it does not mean everyone in Serpentine experienced that outage. · The duration of an outage will also differ for different customers. If Western Power can 'back feed' customers from elsewhere (by opening and closing switches) these customers will have a shorter outage than those who are close to the fault, who may have to wait until the fault has been repaired. · If an outage is listed for Byford, for example, it may have affected a part of Byford, as well as part of Mundijong and Jarrahdale. When listing outages by suburb, therefore, this one outage would appear three times. The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating. These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
· An outage can affect just two properties or several thousand. Just because an outage is listed for, say, Serpentine, it does not mean everyone in Serpentine experienced that outage. · The duration of an outage will also differ for different customers. If Western Power can 'back feed' customers from elsewhere (by opening and closing switches) these customers will have a shorter outage than those who are close to the fault, who may have to wait until the fault has been repaired. · If an outage is listed for Byford, for example, it may have affected a part of Byford, as well as part of Mundijong and Jarrahdale. When listing outages by suburb, therefore, this one outage would appear three times. The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating. These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
· The duration of an outage will also differ for different customers. If Western Power can 'back feed' customers from elsewhere (by opening and closing switches) these customers will have a shorter outage than those who are close to the fault, who may have to wait until the fault has been repaired. · If an outage is listed for Byford, for example, it may have affected a part of Byford, as well as part of Mundijong and Jarrahdale. When listing outages by suburb, therefore, this one outage would appear three times. The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating. These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
· If an outage is listed for Byford, for example, it may have affected a part of Byford, as well as part of Mundijong and Jarrahdale. When listing outages by suburb, therefore, this one outage would appear three times. The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating. These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating. These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation. Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Roleystone is supplied from the Gosnells Substation, but has similar characteristics. Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Western Power figures show that in the past 12 months, more than 60.1% of outages were caused by wind borne vegetation. Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area. Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability. Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance. Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses. From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages: a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage) b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage) c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March) d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage). e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10) 2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
2) (a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
(a) Byford: 6 (b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
(b) Serpentine: 5 (c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
(c) Jarrahdale: 1 (d) Roleystone: 28 (e) Mundijong: 2
(d) Roleystone: 28 (e) Mundijong: 2
(e) Mundijong: 2
AnswerView source ↗
Answered
8 November 2005
Responded by
Minister for Energy
Response time
27 days
1 While Western Power is able to list outages by suburb, it is important to understand that the electricity network is not suburb specific, and that:
· An outage can affect just two properties or several thousand. Just because an outage is listed for, say, Serpentine, it does not mean everyone in Serpentine experienced that outage.
· The duration of an outage will also differ for different customers. If Western Power can 'back feed' customers from elsewhere (by opening and closing switches) these customers will have a shorter outage than those who are close to the fault, who may have to wait until the fault has been repaired.
· If an outage is listed for Byford, for example, it may have affected a part of Byford, as well as part of Mundijong and Jarrahdale. When listing outages by suburb, therefore, this one outage would appear three times.
The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating.
These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation.
Roleystone is supplied from the Gosnells Substation, but has similar characteristics.
Western Power figures show that in the past 12 months, more than
60.1% of outages were caused by wind borne vegetation.
Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area.
Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability.
Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance.
Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses.
From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages:
a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage)
b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage)
c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March)
d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage).
e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10)
2)
(a) Byford: 6
(b) Serpentine: 5
(c) Jarrahdale: 1
(d) Roleystone: 28
(e) Mundijong: 2
· An outage can affect just two properties or several thousand. Just because an outage is listed for, say, Serpentine, it does not mean everyone in Serpentine experienced that outage.
· The duration of an outage will also differ for different customers. If Western Power can 'back feed' customers from elsewhere (by opening and closing switches) these customers will have a shorter outage than those who are close to the fault, who may have to wait until the fault has been repaired.
· If an outage is listed for Byford, for example, it may have affected a part of Byford, as well as part of Mundijong and Jarrahdale. When listing outages by suburb, therefore, this one outage would appear three times.
The areas of Byford, Serpentine and Jarrahdale and Mundijong are part of the Byford Substation Network. This is made up of five feeders, totalling 560 kilometres of overhead line which travels through terrain which is sparsely populated and, in places, heavily forested and undulating.
These characteristics make the network more prone to failures than those in the more developed urban areas, which are more compact, more closely integrated and have less contact with vegetation.
Roleystone is supplied from the Gosnells Substation, but has similar characteristics.
Western Power figures show that in the past 12 months, more than
60.1% of outages were caused by wind borne vegetation.
Western Power is working to strengthen electricity supplies in the Serpentine-Jarrahdale area.
Two programs, the Worst Performing Feeder and Rogue Feeder programs, are being undertaken this financial year at a cost of $7-8 million, to improve reliability.
Other work being undertaken to improve performance includes; deployment of dedicated crews to monitoring feeder power line conditions and produce maintenance programs for prompt rectification; prioritisation of vegetation work to clear vegetation from around feeders; and the prioritisation of pole top switch maintenance.
Western Power will also install covered power lines (to prevent outages from vegetation touching power lines), fault indicators (which help find the fault quickly and so reduces the outage time), remote-control pole top switches and sparkless fuses.
From 1 September 2004 and 1 September 2005 Western Power recorded the following network outages:
a) Byford: 66 ranging from 7 minutes to 36 hrs (May storm damage)
b) Serpentine: 80, ranging from 7 minutes to 59 hrs (May storm damage)
c) Jarrahdale: 38 ranging from 7 minutes to almost 17 hours (Pole Top Fires of 10 March)
d) Roleystone: 62 ranging from one minute to 34 hours (May storm damage).
e) Mundijong 61 ranging from two minutes to 25 hours (Pole top fires March 10)
2)
(a) Byford: 6
(b) Serpentine: 5
(c) Jarrahdale: 1
(d) Roleystone: 28
(e) Mundijong: 2
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