New Zealand Gazette – 2005 – No. 7

Page 161

✨ Electricity Reliability Statistics



Reliability Performance Measures (Requirement 21)

CAIDI Average CAIDI CAIDI Targets Actual CAIDI
Class 2004/08 2004 2003

CAIDI

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

| | | | 127 | 134 | 68 | 238 |

CAIDI Targets (= a/b)

Planned interruptions
Class B: | 133 | 150 |
Class C: | 137 | 150 |

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 | 1,029,866 | 1,119,420 |
| | Class C | 7,463 | 7,463 |

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 | 5,796,100 | 6,343,380 |
| | | 42,299 | 42,289 |

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

Class 2004/08 2004 2003 2002 2001
Class A 210 312 0 0 11
Class B 188 147 259 49 59
Class C 189 113 1,399 0 179
Class D 22 0 0 5
Class E 0 0 0 0
Class F 0 0 0 0
Class G 154 0 0 0
Class H 0 0 0 0
Class I 0 0 0 0

CAIDI for total of interruptions

| | | 127 | 134 | 68 | 238 |

where -

  • a = sum of interruption duration factors for all interruptions
Class 2004/08 2004 2003 2002 2001
Class A 78,750 587,769 0 32,862 0
Class B 946,417 1,438,693 1,039,150 625,231
Class C 7,344,384 7,213,916 2,861,194 16,590,857
Class D 468,448 1,545,201 48,870 9,727,476
Class E 0 0 0 0
Class F 0 0 0 0
Class G 27,772 0 0 0
Class H 0 0 0 0
Class I 0 0 0 0

b = sum of electricity consumers affected by each of those interruptions within that interruption class

Class 2004/08 2004 2003 2002 2001
Class A 375 1,883 0 2,889 0
Class B 5,026 9,765 7,478 10,841
Class C 43,485 64,049 58,178 93,310
Class D 20,791 5,000 5,430 6,955
Class E 0 0 0 0
Class F 0 0 0 0
Class G 180 0 0 0
Class H 0 0 0 0
Class I 0 0 0 0


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Online Sources for this page:

VUW Te Waharoa — PDF NZ Gazette 2005, No 7


Gazette.govt.nz — PDF NZ Gazette 2005, No 7




✨ LLM interpretation of page content

🏗️ Reliability Performance Measures (Requirement 21) (continued from previous page)

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