New Zealand Gazette – 2008 – No. 11

Page 296

✨ Electricity Reliability Performance Measures

296

NEW ZEALAND GAZETTE, No. 11

28 JANUARY 2008

DISCLOSURE OF RELIABILITY PERFORMANCE MEASURES UNDER THE ELECTRICITY INFORMATION DISCLOSURE REQUIREMENTS 2004

	2007	2006	2005	2004	2003
1. Total Number of Interruptions
Class A - Planned - by Transpower	0	0	1	1	0
Class B - Planned - by Northpower	208	211	251	149	160
Class C - Unplanned - by Northpower	310	290	225	256	361
Class D - Unplanned - by Transpower	1	1	1	0	2
Total	519	502	478	406	523
2. Interruption Targets for 2007/2008
Class B - Planned - by Northpower	180
Class C - Unplanned - by Northpower	220
3. Average Interruption Targets for Next 5 Yrs
Class B - Planned - by Northpower	160
Class C - Unplanned - by Northpower	170
4. Proportion of Class C	3 Hrs	17.7%	16.8%	16.4%	15.5%
Interruptions not restored within	24 Hrs	0%	0%	0%	0%
5. (a) Total No. of Faults per	11 kV	9.19	8.52	6.72	7.79
100 circuit kilometres of	33 kV	4.33	5.63	5.11	7.76
prescribed voltage electric line	All	8.87	8.33	6.61	7.79
(b) Target for 2007/2008 Year	11 kV	7.30
	33 kV	2.00
	All	7.00
(c) Average Target for	11 kV	5
next five years	33 kV	2
	All	5
6. Total No. of Faults per 100 circuit	11 kV	2.01	2.01	1.68	1.92
kilometres of underground	33 kV	0.00	0.00	0.00	0.00
prescribed voltage electric line	All	1.82	1.82	1.48	1.67
7. Total No. of Faults per 100 circuit	11 kV	9.53	8.83	6.91	7.76
kilometres of overhead	33 kV	4.65	6.05	5.48	7.79
prescribed voltage electric line	All	9.22	8.65	6.82	7.79
8. The SAIDI for the total No. of Interruptions		151.33	119.23	113.24	145.32
9. SAIDI Targets for 2007/08
Class B - Planned - by Line Owners	30
Class C - Unplanned - by Line Owners	87
10. Average SAIDI Target for next five years
Class B - Planned - by Line Owners	30
Class C - Unplanned - by Line Owners	85