Source: PWC Standards of Service Reports 2013-14 and 2014-15. The Commission is generally satisfied with the investigation work completed by PWC to determine the causes of circuit outages. Feeder Network Performance To measure the reliability performance of PWC feeders, the key indicators are: SAIDI, which indicates the average duration of network and generation-related outages experienced by a customer; and which indicates the average number of network and generation-related outages experienced by a customer. PWC met the feeder network standard in all four feeder categories. However, there has been some deterioration in the performance of long rural feeders and a deterioration in all categories when the system black event of 12 March 2014 is excluded. Table 93: 2014-15 Distribution SAIDI results segmented by feeder category Feeder categories SAIDI target standard (minutes) SAIDI 2012-13 results (minutes) 2013-14 results (minutes) SAIDI 2013-14 results (minutes) excl. 12 March SAIDI 2014-15 results (minutes) Target standard met (2014-15) CBD 18.8 1.1 292.1 0.1 0.7 Yes Urban 136.0 111.0 288.1 52 127.6 Yes Rural Short 496.3 536.9 525.3 229 372.9 Yes Rural Long 2164.9 1108.7 206.4 156 755.9 Yes Source: PWC Standards of Service Reports 2013-14 and 2014-15. PWC met the feeder SAIFI standards in all four feeder categories though there has been some deterioration in the long rural feeder category. Table 94: 2013-14 Distribution SAIFI results segmented by feeder category Feeder categories SAIFI target standard (minutes) SAIFI 201213 results (minutes) SAIFI 201314 results (minutes) SAIFI 201314 results (minutes) Excl. 12 March 201415 results (minutes) Target standard met (2014-15) CBD 0.4 0.03 0.6 0.01 0.1 Yes Urban 2.5 2.5 1.6 0.9 1.6 Yes Rural Short 8.1 9.1 4.1 3.3 4.8 Yes
improve cyclone performance of Elizabeth River 132kV crossings to category 4 (in construction for commissioning pre 2016-17 wet season); Palmerston to Archer transmission line (concept design and budgeting phase – 2017-18) 22kV switchboard replacement at Sadadeen, Alice Springs (deferred); new 11kV switchboard at Sadadeen, Alice Springs (planning phase); Berrimah ZSS replacement (in review); replace Casuarina ZSS 66kV switchgear (under construction); and 132/66kV terminal station and transmission Weddell-Woolner (long-term planning). A summary of the major and minor capital project expenditures as proposed by PWC is shown in Table 9.8. Table 98: Forecast capital expenditure ($ million, real $2013-14 with input cost escalation) Project ($M) 2015-16 2016-17 2017-18 2018-19 Total major projects 46.4 25.6 14.0 24.2 Capital items and Essential spares 0.7 0.7 0.7 0.7 Asset Replacement and Upgrade Programs 7.2 6.0 5.9 3.3 HV Cable Replacement Program 1.3 1.5 1.5 1.5 ORMU Replacement Program 2.5 1.3 1.2 1.3 Feeder Upgrade Program 2.4 1.7 1.6 1.5 Customer Augmentation and Network Extension Program 6.5 6.7 6.5 6.5 SCADA and Communication Systems Replacement and Upgrade Program 1.6 1.6 1.6 1.6 Protection Upgrade Program 1.0 1.1 0.9 0.5 Meters/Metering Program 1.1 1.7 2.8 3.1 Customer Connection Program 0.8 0.8 0.8 0.8 Underground Distribution Substation Replacement Program 1.5 0.9 1.4 2.4 minor works 1.1 1.1 1.1 1.1 Total Capital Expenditure (Last year’s report) 75.4 (84.7) 51.8 (74.8) 41.0 (57.4) 49.0 (48.4) Source: PWC Network Management Plan