New Zealand Gazette – 2005 – No. 23

Page 553

✨ Electricity Reliability Performance Measures



Requirement 21 (Schedule 1, Part 5)

RELIABILITY PERFORMANCE MEASURES

YEAR ENDED 31 MARCH 2004

Interruptions

2005/09 Target 2005 Target 2004 Actual 2003 2002 2001
Total Interruptions 1,000 1,000 1,012 583 476 553
a) Planned Interruptions (Class B) 500 500 490 324 281 360
b) Unplanned Interruptions (Class C) 500 500 522 259 195 193

| Unplanned Interruptions not restored within: |
|-----------------------------------------------|--------------|
| a) 3 Hours (%) | 43.00% | 29.00% | 29.70% | 15.50% |
| b) 24 Hours (%) | 1.72% | 0.39% | 1.00% | 7.00% |

Faults

2005/09 Target 2005 Target 2004 Actual 2003 2002 2001
Faults/100km
a) Total No. of faults 9.60 8.96 7.51 7.50
b) Next year targets 9.80
c) Next 5 year average target 9.80
d)(i) 33kV Line Voltage
a) Total no. of faults 5.17 3.58 2.57 6.96
b) Next year target 4.75
c) Next 5 year target 4.75
(ii) 11kV Line Voltage
a) Total no. of faults 11.20 8.89 7.91 7.48
b) Next year target 10.29
c) Next 5 year target 10.29
Faults/100km of Underground Line
a) Total
b) 33kV
c) 11kV
Faults/100km of Overhead Line
a) Total
b) 33kV
c) 11kV

*2 Substation equipment faults are now classified as underground 33kV faults

RELIABILITY MEASURES

2005/09 Target 2005 Target 2004 Actual 2003 2002 2001
TOTAL SAIDI OVERALL 132 136 202 96.61 101.63 385.03
SAIDI
a) Planned Interruptions (Class B) 38.00 40.00 30.00 24.52 31.80 62.88
b) Unplanned Interruptions (Class C) 94.00 96.00 171.00 72.08 69.10 81.27
TOTAL SAIFI OVERALL 2.32 2.4 2.38 2.02 2.14 4.75
SAIFI
a) Planned Interruptions (Class B) 0.45 0.42 0.21 0.22 0.25 0.41
b) Unplanned Interruptions (Class C) 1.87 1.98 2.17 1.80 1.89 2.34
c) Unplanned Interruptions Transpower (Class D) - - - 0.39 - 2.00

| Total CAIDI OVERALL |
|-------------------------|----------------|-------------|-------------|----------|---------|---------|
| CAIDI | 57 | 57 | 85 | 86.6 | 47.49 | 81.06 |
| a) Planned Interruptions (Class B) | 95 | 95 | 141 | 172.33 | 126.6 | 143 |
| b) Unplanned Interruptions (Class C) | 48 | 48 | 79 | 56.25 | 36.56 | 34.8 |
| c) Unplanned Interruptions Transpower (Class D) | - | - | - | - | 2.23 | 123 |



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Online Sources for this page:

VUW Te Waharoa — PDF NZ Gazette 2005, No 23


Gazette.govt.nz — PDF NZ Gazette 2005, No 23




✨ LLM interpretation of page content

🏭 Financial and Efficiency Performance Measures for Unison Networks - Lines Business (continued from previous page)

🏭 Trade, Customs & Industry
Financial performance, Efficiency measures, Return on funds, Return on equity, Return on investment, Direct line cost, Indirect line cost, Annual Valuation Reconciliation Report, Electricity Information Disclosure Requirements 2004, System fixed assets, ODV, Depreciation, Revaluation