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New Zealand Gazette – 1996 – No. 173

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✨ Electricity Reliability Statistics

29 NOVEMBER NEW ZEALAND GAZETTE 4575

Part V

Reliability Performance Measures To Be Disclosed By Trans Power

(Disclosure Under Regulation 17)

Total number of unplanned interruptions
Resulting from 97 loss of supply incidents in 1995-96... 229 184 234
Electricity customer interruptions in system minutes... 12.2 19.5 15.1
- planned... 5.8 4.4 5.6
- unplanned... 6.4 15.1 9.5
Underlying electricity customer interruptions in system minutes... 7.1 14.1 10.3
Underlying interruptions are those interruptions of 1 system minute or less duration
- planned... 3.1 2.9 4.3
- unplanned... 4.0 11.2 6.0
Average supply reliability... 99.9963% 99.9942% 99.9956%
Measured by the energy supplied divided by the sum of the energy supplied and not supplied
Uneconomic generation due to planned and unplanned transmission system unavailability... 0.81% 0.68% 0.81%
Uneconomic generation relates to the amount of electricity generated from any source other than the most economic source.
Uneconomic generation due to HVDC system unavailability... 0.73% 0.60% 0.69%
Uneconomic generation due to unplanned transmission system unavailability... 0.22% 0.15% 0.07%
Planned interruption restoration performance... 80.5% 92.5% 76.6%
Unplanned interruption response... 99.1% 100% 99.6%

The information compiled using estimated information includes Part V sections 2,3,4,5,6 and 7.

The methodology used to calculate the estimated information is documented and available from Trans Power upon request.

These figures have been changed from those published in the the 1994/95 gazetted information, where two supply voltages at the same station are both interrupted this is now counted as two interruptions and not one as previously.

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VUW Te Waharoa — NZ Gazette 1996, No 173

NZLII — NZ Gazette 1996, No 173

The Executive Wing of Parliament (depicted) is universally known as The Beehive. It was completed in 1977 and remains the primary office for the elected Government of the day.

✨ LLM interpretation of page content

🏭 Electricity Reliability Performance Measures (continued from previous page)

Domain🏭 Trade, Customs & Industry
KeywordsElectricity, Reliability, Interruptions, Transmission, HVDC, Performance Measures, Statistics

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