New Zealand Gazette – 1997 – No. 121

Page 2881

✨ Electricity Reliability Statistics

9 SEPTEMBER NEW ZEALAND GAZETTE 2881

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

	1995	1996	1997
1. Total number of interruptions	827	758	839
(a) Planned interruptions by Trans Power	0	0	1
(b) Planned interruptions by Northpower	524	477	460
(c) Unplanned interruptions originating within Northpower system	298	277	370
(d) Unplanned interruptions originating within Trans Power system	5	3	8
(e) Unplanned interruptions originating within ECNZ system	0	1	0
(f) Unplanned interruptions originating within other generator's
systems	0	0	0
(g) Unplanned interruptions originating from other than above	0	0	0
2. Total number of faults per 100 circuit kilometres of prescribed	9.49	9.31	10.72
voltage electric line
3. Total number of faults per 100 circuit kilometres of underground	4.89	4.15	1.54
prescribed voltage line and per different nominal line voltages:-
11 kV underground	Nil	9.37	0
33 kV underground
4. Total number of faults per 100 circuit kilometres of overhead	8.38	8.64	10.94
prescribed voltage lines and per different nominal line voltages:-
11 kV overhead	8.49	8.80	10.96
33 kV overhead	6.20	6.08	10.56
5. The SAIDI for the total of interruptions	238.0 mins	246.6 mins	379.43 mins
6. The SAIDI for the total number of interruptions within each
interruption class:-
(a) Planned interruptions by Trans Power	0	0	19.39 mins
(b) Planned interruptions by Northpower	74.29 mins	70.77 mins	82.43 mins
(c) Unplanned interruptions originating within Northpower system	137.32 mins	156.75 mins	205.95 mins
(d) Unplanned interruptions originating within Trans Power system	26.39 mins	18.06 mins	71.67 mins
7. The SAIFI for the total number of interruptions.	5.8 intrupts	5.2 intrupts	7.66 intrupts
8. The SAIFI for the total number of interruptions within each
interruption class:-
(a) Planned interruptions by Trans Power	0	0	0.065 intrupts
(b) Planned interruptions by Northpower	0.88 intrupts	0.69 intrupts	0.71 intrupts
(c) Unplanned interruptions originating within Northpower system	3.83 intrupts	3.61 intrupts	4.576 intrupts
(d) Unplanned interruptions originating within Trans Power system	0.84 intrupts	0.68 intrupts	2.304 intrupts
9. The CAIDI for the total of all interruptions	41.10 mins	48.31 mins	49.6 mins
10. The CAIDI for the total number of interruptions within each
interruption class:-
(a) Planned interruptions by Trans Power	0	0	300 mins
(b) Planned interruptions by Northpower	84.35 mins	102.33 mins	115.7 mins
(c) Unplanned interruptions originating within Northpower system	35.90 mins	43.36 mins	45.0 mins
(d) Unplanned interruptions originating within Trans Power system	26.39 mins	26.68 mins	31.1 mins

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VUW Te Waharoa — NZ Gazette 1997, No 121

NZLII — NZ Gazette 1997, No 121

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✨ LLM interpretation of page content

🏭 Disclosure of Reliability Performance Measures for Northpower Ltd. (continued from previous page)

Domain🏭 Trade, Customs & Industry
KeywordsElectricity, Reliability, Performance Measures, Statistics, Northpower Ltd.

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