β¨ Electricity Reliability Performance Measures
Reliability Performance Measures (Requirement 21)
Interruptions
| Interruptions | Average Interruption Targets 2008/2012 | Interruption Targets 2008 | Actual Interruptions |
|---|---|---|---|
| 2007 | |||
| Planned Interruptions | |||
| Class A | 0.27 | 1 | 1 |
| Class B | 72 | 72 | 93 |
| Unplanned Interruptions | |||
| Class C | 130 | 130 | 263 |
| Class D | 7 | 7 | 3 |
| Class E | 2 | 2 | 9 |
| Class F | 2 | 2 | 0 |
| Class G | 2 | 4 | 0 |
| Class H | 4 | 3 | 0 |
| Class Total | 321 | 369 |
Proportion of total Class C interruptions not restored: =(a/b*100)[1]
where -
a = No. of interruptions not restored within
| Within 3 Hours | Within 24 Hours | |
|---|---|---|
| a = | 168 | 11 |
| b = Total number of Class C | ||
| interruptions | 263 | |
| Proportion expressed as % | 63.88% | 4.18% |
Faults
| Faults per 100 circuit kilometres of prescribed voltage electric line | Average Faults Targets 2008/11 | Faults Targets 2008 | Actual number of faults |
|---|---|---|---|
| 2007 | |||
| Nominal Voltage | |||
| 50kV | 3.00 | 3.00 | 5.67 |
| 33kV | 5.88 | 5.88 | 8.72 |
| 11kV | 6.60 | 6.60 | 8.31 |
| Total | 6.26 | 6.26 | 8.07 |
| Faults per 100 circuit kilometres of underground prescribed voltage electric line | Actual number of faults |
|---|---|
| 2007 | |
| Nominal Voltage | |
| 50kV | 0.00 |
| 33kV | 0.00 |
| 11kV | 8.80 |
| Total | 8.71 |
| Faults per 100 circuit kilometres of overhead prescribed voltage electric line | Actual number of faults |
|---|---|
| 2007 | |
| Nominal Voltage | |
| 50kV | 5.69 |
| 33kV | 8.73 |
| 11kV | 8.29 |
| Total | 8.04 |
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Online Sources for this page:
VUW Te Waharoa —
NZ Gazette 2008, No 55
Gazette.govt.nz —
NZ Gazette 2008, No 55
β¨ LLM interpretation of page content
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Reliability Performance Measures for Electricity Interruptions and Faults
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ποΈ Infrastructure & Public WorksElectricity, Reliability, Interruptions, Faults, Performance Measures, Statistics