Electricity Reliability Statistics




NEW ZEALAND GAZETTE

22 OCTOBER

THE POWER COMPANY LIMITED

RELIABILITY PERFORMANCE MEASURES

(LINE BUSINESS)

PURSUANT TO REGULATION 16

ELECTRICITY (INFORMATION DISCLOSURE) REGULATIONS 1994

11.0 RELIABILITY STATISTICS REQUIRED FOR THE DISCLOSURE REGULATIONS

APRIL 1994 - MARCH 1995, APRIL 1995 - MARCH 1996, APRIL 1996 - MARCH 1997

Connected Customers Line 66kV Line 33kV Line 11kV Line 400V Cable 33kV Cable 11kV Cable 6.6kV Cable 400V Total Density Cust/km
1994/95 Average 34182 239 467 6392 1013 0.75 39 0.59 95 8247 4.14
1995/96 Average 32941 239 468 6397 1012 0.75 41 0.59 96 8254 3.99
1996/97 Average 30589 246 462 6401 1013 0.75 42 0.59 98 8263 3.70
CLASS B C Subtotal A D Subtotal E Subtotal F Subtotal G TOTAL
Interruptions 287 336 623 0 1 1 0 0 0 0 0 624
SAIDI 35.6 125.4 161 0 0.4 0.4 0 0 0 0 0 161.4
1994/95 SAIFI 0.372 2.099 2.471 0 0.15 0.15 0 0 0 0 0 2.621
CAIDI 96 60 65 0 3 3 0 0 0 0 0 62
Interruptions 384 428 812 0 0 0 0 0 0 0 0 812
1995/96 SAIDI 65.6 300.6 366.2 0 0 0 0 0 0 0 0 366.2
SAIFI 0.52 3.475 3.995 0 0 0 0 0 0 0 0 3.995
CAIDI 176 86 95 0 0 0 0 0 0 0 0 95
Interruptions 439 483 922 0 3 3 0 0 0 0 0 925
1996/97 SAIDI 65.7 418.4 484.1 0 8.2 8.2 0 0 0 0 0 492.3
SAIFI 0.532 5.081 5.613 0 1.002 1.002 0 0 0 0 0 6.615
CAIDI 123.4 82.4 86.3 0 8.18 8.18 0 0 0 0 0 74.4

Unplanned Faults by Voltage

66kV 33kV 11kV 6.6kV Total Lines and Cables
1994/95 OH per 100km 2.1 1.3 5 0 4.6
UG per 100km 0 0 23.2 0 22.4
Total per 100km 2.1 1.3 5.1 0 4.1

| 1995/96 OH per 100km | 1.7 | 2.6 | 12.1 | 0 | 11.1 |
| UG per 100km | 0 | 0 | 14.3 | 0 | 14.1 |
| Total per 100km | 1.7 | 2.6 | 12.1 | 0 | 5.2 |

| 1996/97 OH per 100km | 0.4 | 2.2 | 7.1 | 0 | 6.4 |
| UG per 100km | 0 | 0 | 23.8 | 0 | 37.4 |
| Total per 100km | 0.4 | 2.2 | 7.2 | 0 | 6.8 |

PUBLISHED BY AUTHORITY OF DEPARTMENT OF INTERNAL AFFAIRS:
GF LEGISLATION SERVICES LIMITED, WELLINGTON, NEW ZEALAND—1997

ISSN 0111-5650
Price $2.30 (inc. G.S.T.)
30417—97A



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