New Zealand Gazette – 2008 – No. 55

Page 1568

✨ Electricity Reliability Statistics



Reliability Performance Measures (Requirement 21)

CAIDI

Average CAIDI Targets CAIDI Targets Actual CAIDI
Class 2008/12 2008 2007
CAIDI for total number of Interruptions (= a/b)
where -

a = sum of interruption duration factors for all interruptions
b = sum of electricity consumers affected by each of those interruptions |
| | | 66.08 | 136 | 133 | 22.00 | 127 |

CAIDI Targets (=a/b)

Planned Interruptions
Class B 214
Class C 64
Unplanned Interruptions
Class B 214
Class C 64

where -

Planned Interruptions
a = sum of interruption duration factors for all interruptions
b = projected number of electricity consumers affected by each of those interruptions
Class B 1,067,125
Unplanned Interruptions
Class C 4,992

Unplanned Interruptions
a = sum of interruption duration factors for all interruptions
b = projected number of electricity consumers affected by each of those interruptions
Class C 6,047,044
94,855

CAIDI for total number of interruptions within each interruption class (= a/b)

Class
2008/12 2008
Class A 329.00
Class B 127.50
Class C 62.84
Class D 0.00
Class E 0.00
Class F 0.00
Class G 51.35
Class H 0.00
Class I 0.00

CAIDI for total of Interruptions

| | 66.09 | 136.00 | 133.00 | 127.00 |

where -
a = sum of interruption duration factors for all interruptions
b = sum of electricity consumers affected by each of those interruptions within that interruption class

Class
2008/12 2008 2007 2006
Class A 107,593 137,423 0 70,750
Class B 467,425 683,676 770,671 346,417
Class C 5,919,894 8,001,348 6,213,421 7,344,364
Class D 30,383 38,505 0 466,448
Class E 0 0 0 0
Class F 0 1,431 0 27,721
Class G 19,872 0 0 0
Class H 0 0 0 0
Class I 72,195 0 0 0
Class A 327 383 4,723
Class B 3,666 3,663 4,660
Class C 94,200 61,095 47,724
Class D 94 615 497
Class E 0 0 0
Class F 0 0 0
Class G 387 0 0
Class H 0 0 0
Class I 0 70 0


Next Page →



Online Sources for this page:

VUW Te Waharoa — PDF NZ Gazette 2008, No 55


Gazette.govt.nz — PDF NZ Gazette 2008, No 55




✨ LLM interpretation of page content

🏗️ Reliability Performance Measures for Electricity Interruptions and Faults (continued from previous page)

🏗️ Infrastructure & Public Works
Electricity, Reliability, Interruptions, Faults, Performance Measures, Statistics