New Zealand Gazette – 2005 – No. 143

Page 3509

✨ Reliability Performance Measures



Requirement 21 (Schedule 1, Part 5)

RELIABILITY PERFORMANCE MEASURES

YEAR ENDED 31 MARCH 2005

Interruptions

2006/09 Target 2006 Target 2005 Actual 2004 2003 2002
Total Interruptions 1,000 1,000 983 1,012 583 476
a) Planned Interruptions (Class B) 500 500 463 490 324 281
b) Unplanned Interruptions (Class C) 500 500 520 522 259 195

| Unplanned Interruptions not restored within: |
| a) 3 Hours (%) | - | 25.00% | 43.00% | 29.00%| 29.70%|
| b) 24 Hours (%) | - | 0.96% | 1.72% | 0.39% | 1.00% |

Faults

Faults/100km 2006/09 Target 2006 Target 2005 Actual 2004 2003 2002
a) Total No. of faults - - 9.38 10.67 8.96 7.51
b) Next year targets 10.55 - - - - -
c) Next 5 year average target 9.80 - - - - -
d) i) 33kV Line Voltage
a) Total no. of faults - - 5.63 5.17 3.58 2.57
b) Next year target 6.34 - - - - -
c) Next 5 year target 4.75 - - - - -
ii) 11kV Line Voltage
a) Total no. of faults - - 9.71 11.20 8.89 7.91
b) Next year target 10.95 - - - - -
c) Next 5 year target 10.29 - - - - -

| Faults/100km of Underground Line |
| a) Total | 8.82 | - | 7.22 | 10.06 | 11.65 |
| b) 33kV | - | - | 6.60 | - | - |
| c) 1kV | 9.28 | - | 7.59 | 10.06 | 11.46 |

| Faults/100km of Overhead Line |
| a) Total | - | - | 8.44 | 11.18 | 12.52 | 6.73 |
| b) 33kV | 6.08 | - | 5.06 | 3.20 | 2.82 |
| c) 11kV | 9.78 | - | 11.81 | 9.31 | 7.21 |

Note: 2 substation equipment faults are now classed as underground 33kV faults

RELIABILITY MEASURES

2006/09 Target 2006 Target 2005 Actual 2004 2003 2002
TOTAL SAIDI (Classes B & C) 153 153 156 202 97 102
SAIDI
a) Planned Interruptions (Class B) 68 68 25 30 25 32
b) Unplanned Interruptions (Class C) 85 85 130 171 72 69
c) Unplanned Interruptions Transpower (Class D) - - 5 - - -

| TOTAL SAIFI (Classes B & C) | 2.39 | 2.39 | 3.21 | 2.38 | 2.02 | 2.14 |
| SAIFI |
| a) Planned Interruptions (Class B) | 0.75| 0.75 | 0.16 | 0.21 | 0.22 | 0.25 |
| b) Unplanned Interruptions (Class C) | 1.64 | 1.64 | 3.05 | 2.17 | 1.80 | 1.89 |
| c) Unplanned Interruptions Transpower (Class D) | - | - | 0.20 | - | - | 0.39 |

| Total CAIDI (Classes B & C) | 64 | 64 | 48 | 85 | 67 | 47 |
| CAIDI |
| a) Planned Interruptions (Class B) | 91 | 91 | 154 | 141 | 172 | 127 |
| b) Unplanned Interruptions (Class C) | 52| 52 | 43 | 79 | 56 | 37 |
| c) Unplanned Interruptions Transpower (Class D) | - | - | 22 | - | - | 2 |



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Online Sources for this page:

VUW Te Waharoa — PDF NZ Gazette 2005, No 143


Gazette.govt.nz — PDF NZ Gazette 2005, No 143




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