✨ Reliability Performance Measures




NEW ZEALAND GAZETTE

No. 139

DISCLOSURE OF RELIABILITY PERFORMANCE MEASURES PURSUANT TO REGULATION 16 OF THE ELECTRICITY (INFORMATION DISCLOSURE) REGULATIONS 1994

1995 1996 1997 1998
1. Total number of interruptions:
(a) Planned interruptions by Trans Power 827 758 839 986
(b) Planned interruptions by Northpower 0 0 1 0
(c) Unplanned interruptions originating within Northpower system 524 477 460 628
(d) Unplanned interruptions originating within Trans Power system 298 277 370 358
(e) Unplanned interruptions originating within ECNZ system 5 3 8 0
(f) Unplanned interruptions originating within other generator's systems 0 1 0 0
(g) Unplanned interruptions originating from other than above 0 0 0 0

| 2. Total number of faults per 100 circuit kilometres of prescribed voltage electric line | 9.49 | 9.31 | 10.72 | 10.81 |

| 3. Total number of faults per 100 circuit kilometres of underground prescribed voltage line and per different nominal line voltages: | | | | |
| 11 kV underground | 4.08 | 5.09 | 1.61 | 4.84 |
| 33 kV underground | 4.89 | 4.15 | 0 | 6.12 |
| | Nil | 9.37 | 2.00 | 0 |

| 4. Total number of faults per 100 circuit kilometres of overhead prescribed voltage lines and per different nominal line voltages: | | | | |
| 11 kV overhead | 8.38 | 8.64 | 11.67 | 10.81 |
| 33 kV overhead | 8.49 | 8.80 | 11.78 | 10.79 |
| | 6.20 | 6.08 | 10.00 | 11.56 |

| 5. The SAIDI for the total of interruptions | 238.0 mins | 248.6 mins | 379.43 mins | 240.51 mins|

| 6. The SAIDI for the total number of interruptions within each interruption class: | | | | |
| (a) Planned interruptions by Trans Power | 74.29 mins | 70.77 mins | 19.28 mins | 0 mins |
| (b) Planned interruptions by Northpower | 0 | 0 | 81.95 mins | 115.36 mins|
| (c) Unplanned interruptions originating within Northpower system | 137.32 mins| 156.75 mins| 205.95 mins | 125.16 mins|
| (d) Unplanned interruptions originating within Trans Power system | 26.39 mins | 18.06 mins | 71.67 mins | 0 mins |

| 7. The SAIFI for the total number of interruptions | 5.8 interruptions | 5.2 interruptions | 7.66 interruptions | 4.031 interruptions |

| 8. The SAIFI for the total number of interruptions within each interruption class: | | | | |
| (a) Planned interruptions by Trans Power | 0.88 interruptions | 0 interruptions | 0.065 interruptions | 0 interruptions |
| (b) Planned interruptions by Northpower | 0 | 0.69 interruptions | 0.71 interruptions | 0.969 interruptions |
| (c) Unplanned interruptions originating within Northpower system | 3.83 interruptions | 3.61 interruptions | 4.576 interruptions | 3.062 interruptions |
| (d) Unplanned interruptions originating within Trans Power system | 0.84 interruptions | 0.68 interruptions | 2.304 interruptions | 0 interruptions |

| 9. The CAIDI for the total of all interruptions | 41.10 mins | 48.31 mins | 49.6 mins | 59.7 mins |

| 10. The CAIDI for the total number of interruptions within each interruption class: | | | | |
| (a) Planned interruptions by Trans Power | 84.35 mins | 0 | 300 mins | 0 mins |
| (b) Planned interruptions by Northpower | 0 | 102.33 mins| 115.7 mins | 119.0 mins |
| (c) Unplanned interruptions originating within Northpower system | 35.90 mins | 43.36 mins | 45.0 mins | 40.9 mins |
| (d) Unplanned interruptions originating within Trans Power system | 26.39 mins | 26.68 mins | 31.1 mins | 0 mins |



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✨ LLM interpretation of page content

🏭 Disclosure of Reliability Performance Measures pursuant to Regulation 16 of the Electricity (Information Disclosure) Regulations 1994 (continued from previous page)

🏭 Trade, Customs & Industry
Reliability Performance, Interruptions, Faults, SAIDI, SAIFI, CAIDI, Electricity, Regulation 16