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received an application from
Transpower for the establishment of a new 220 kV gas insulated switchgear (GIS) facility at ÅtÄhuhu, adjacent to but geographically separate from the existing outdoor 220 kV switchyard. This project was described as the ÅtÄhuhu substation diversity project, and
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connecting the ÅtÄhuhu to
Penrose 220 kV line's earth wire had broken in 90 km/h (56 mph) winds, letting the earth wire fall across the 220 kV line and the 110 kV busbar below it, tripping both the line and three sections of the busbar, disconnecting lines to Mount Roskill,
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power stations from the national grid. The trip left only one line, the now-dismantled
Arapuni to Pakuranga 110 kV line, supplying Pakuranga, Penrose, and the central city. Eight seconds after the failure, this line tripped from overloading, leaving Penrose, Pakuranga, and central city
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provides underground 220 kV cables from
Pakuranga to Penrose, and from Penrose to Albany on the North Shore, via Hobson Street in the Auckland CBD. A 220 kV- capable overhead transmission line between Pakuranga and ÅtÄhuhu has also been upgraded from 110 kV to 220 kV.
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Further steps have been taken to increase security of supply to
Auckland, by reducing the dependence on ÅtÄhuhu. These include the diversity provided as part of the North Island Grid Upgrade Project by connecting the new
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central at 12:40 local time, 12 June 2006. It was estimated that all affected areas would have their power restored by 16:30 local time. At approximately 14:45, power was restored to most of
Auckland, except
35:, on 12 June 2006. It started at 08:30 local time, with most areas of Auckland regaining power by 14:45 local time. It affected some 230,000 customers and at least 700,000 people in and around the city.
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included transferring approximately half of the circuits from the existing switchyard to the new GIS switchyard, to improve network resilience. The project was approved in August 2007.
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Power went off at around 8:30 am local time on 12 June 2006 over half of
Auckland in New Zealand. Most of southern and central Auckland, including the central city were without power.
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Investigation of this incident found that maintenance of the electricity transmission system was not adequate and that this substation had major and minor design deficiencies.
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Since the central city was without power from the morning rush hours, business operations and traffic were disrupted severely. Many businesses sent their staff home.
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The incident at ÅtÄhuhu in June 2006 had a major influence on subsequent decisions about the development of the grid.
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218:"A crisis recalled: The power cuts that plunged the Auckland CBD in darkness for five weeks"
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Due to the power outage, many public services and business operations were disrupted:
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substations without power, as well as parts of ÅtÄhuhu and Mount
Roskill substations.
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end of semester exams due to be held that day at local universities were postponed.
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360:"Otahuhu substation diversity proposal ā Final decision, Electricity Commission"
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substation, rather than directly to ÅtÄhuhu. A second major project, the
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some hospitals were closed and left only emergency services in operations
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301:"INCIDENT REVIEW ā OTAHUHU SUBSTATION LOSS OF SUPPLY 12TH JUNE 2006"
334:"Review of Report on Auckland Transmission Outage of 12 June 2006"
275:"Transpower Announces Reports on Auckland Power Outage in June"
55:, the city's main transmission switching station. A corroded
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The cause of the blackout was traced back to the ÅtÄhuhu
277:. Transmission & Distribution World. 11 July 2006.
417:Electric power transmission systems in New Zealand
60:Penrose and Pakuranga. The trip also disconnected
247:Field, Michael; Walters, Laura (6 October 2014).
197:North Auckland and Northland grid upgrade project
169:North Auckland and Northland grid upgrade project
84:suburban commuter railway services were suspended
192:Whakamaru to Brownhill Road transmission line
161:Whakamaru to Brownhill Road transmission line
8:
97:were also taken offline for a period of time
100:mobile phone and telephone service failures
93:radio station transmitters located in the
87:over 300 groups of traffic lights were off
103:people stuck in lifts in office buildings
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313:from the original on 30 September 2011
306:. Sinclair Knight Merz. 23 June 2006.
281:from the original on 22 November 2008
16:Power outage in Auckland, New Zealand
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340:from the original on 15 October 2008
249:"Auckland's history of power cuts"
228:from the original on 5 August 2019
216:Johnston, Martin (16 April 2018).
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422:Man-made disasters in New Zealand
255:from the original on 16 May 2019
427:June 2006 events in New Zealand
332:Connell Wagner (5 July 2006).
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407:2006 disasters in New Zealand
392:Power outages in New Zealand
143:Improving security of supply
152:Electricity Commission (NZ)
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182:1998 Auckland power crisis
150:On 11 December 2006, the
397:2006 in economic history
23:was a major electrical
118:Power was restored to
114:Restoration of service
31:, the largest city in
21:2006 Auckland Blackout
187:List of power outages
402:2006 in New Zealand
222:New Zealand Herald
412:2000s in Auckland
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370:25 September
368:. Retrieved
364:the original
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342:. Retrieved
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259:1 September
232:1 September
133:East TÄmaki
53:sub-station
33:New Zealand
386:Categories
344:5 February
285:5 February
203:References
129:Glen Innes
251:. Stuff.
165:Pakuranga
95:Sky Tower
66:Southdown
62:ÅtÄhuhu B
338:Archived
308:Archived
279:Archived
253:Archived
226:Archived
176:See also
120:Auckland
29:Auckland
25:blackout
317:26 July
137:ÅtÄhuhu
125:Penrose
76:Effects
57:shackle
135:, and
311:(PDF)
304:(PDF)
47:Cause
372:2011
346:2009
319:2011
287:2009
261:2022
234:2022
64:and
19:The
163:to
27:in
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