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consumers, and also ensure the provision of reserves that will allow for sudden contingencies. The system operator achieves this by determining the optimal combination of generating stations and reserve providers for each market trading period, instructing generators when and how much electricity to generate, and managing any contingent events that cause the balance between supply and demand to be disrupted. System operations staff undertake this work using sophisticated energy modelling and communications systems. In addition to its roles of real-time dispatch of generation and managing security, the system operator also carries out investigations and planning to ensure that supply can meet demand and system security can be maintained during future trading periods. Examples of planning work may include co-ordinating generator and transmission outages, facilitating commissioning of new generating plant and procuring ancillary services to support power system operation.
232:
31:
109:
304:, under Part IV of the Commerce Act. The type of regulation is individual price-quality path (IPP) regulation, and came into effect on 1 April 2011. The individual price-quality path governs Transpower's revenues for each pricing year, with the paths being reset either every four or five years. Quality targets for the transmission service are also reviewed and monitored in the regulatory process.
326:
in real time and co-ordinate the supply of and demand for electricity, in a manner that avoids fluctuations in frequency or interruptions of supply. The system operator is required to maintain a continuous (second-by-second) balance between electricity supply from power stations and demand from
275:
is built to 400 kV but operates at 220 kV), and this is supplemented by 4,719 kilometres (2,932 mi) of 110 kV transmission lines and 797 kilometres (495 mi) of 66 kV and 50 kV transmission lines, which interconnect the core grid to smaller load centres and power stations.
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Transpower owns and operates 11,806 kilometres (7,336 mi) of transmission lines. A core network consisting of 5,719 kilometres (3,554 mi) (route) of 220 kV transmission lines exist in each island
1103:
540:
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217:'s Commercial Operations group (formerly the Crown Ownership Monitoring Unit) monitors the performance of Transpower on behalf of the shareholding ministers.
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with its own board of directors and ministerial shareholders, the
Minister of Finance and the Minister of State-Owned Enterprises. The
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The revenue that
Transpower receives for the provision of the transmission service is regulated by the
255:. Most of the electricity from the national grid is delivered to New Zealand's homes and businesses by
186:
it provides the infrastructure of electric power transmission that allows consumers to have access to
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provides the means of transporting bulk electricity from where it is generated (by companies like
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from a wide range of sources, and enables competition in the wholesale electricity market; as
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The system operator service is provided and funded under an agreement with the
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267:. A few large industrial users are directly connected to the national grid.
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Connecting the
Country – New Zealand's National Grid 1886 – 2007
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Transpower was initially formed as an operating division of the
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251:) to cities, towns and some major industrial users like the
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Electric power transmission system operators in New
Zealand
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205:(ECNZ) in 1987. In 1994 it was separated from ECNZ and
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in New
Zealand. It performs two major functions in the
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and the physical operation of the electricity market.
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16:New Zealand state-owned power transmission company
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942:Ministry of Business, Innovation and Employment
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280:, a 611-kilometre (380 mi) ±350 kV
937:Energy Efficiency and Conservation Authority
284:link between the two islands. There are 178
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1017:public sector organisations in New Zealand
998:
984:
541:
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292:with a total capacity of 14,500 MVA.
194:it manages the real-time operation of the
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1119:New Zealand companies established in 1994
1109:Government-owned companies of New Zealand
230:
1096:
1043:Electricity Corporation of New Zealand
1007:State-owned enterprises of New Zealand
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276:Transpower also owns and operates the
203:Electricity Corporation of New Zealand
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965:List of power stations in New Zealand
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1114:Energy companies established in 1994
13:
481:
14:
1130:
960:Electricity sector in New Zealand
507:
344:Electricity sector in New Zealand
322:is to manage the security of the
296:Regulation under the Commerce Act
1068:New Zealand Railways Corporation
108:
107:
463:"What the system operator does"
492:. Wellington: Steele Roberts.
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433:
397:
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314:New Zealand electricity market
180:New Zealand electricity market
164:Transpower New Zealand Limited
99:Alison Andrew, Chief Executive
24:Transpower New Zealand Limited
1:
349:
253:Tiwai Point Aluminium Smelter
427:"Asset Management Plan 2010"
383:"Transpower New Zealand Ltd"
127:NZ$ 5,597.5 million employed
7:
680:Horizon Energy Distribution
337:
308:Role of the system operator
282:high-voltage direct current
227:National Grid (New Zealand)
176:electric power transmission
61:; 30 years ago
10:
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441:"Electricity transmission"
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549:Electricity companies in
429:. Transpower. April 2010.
221:Role of the National Grid
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97:Dr Keith Turner, Chairman
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55:
47:
37:
28:
920:Regulation and operation
766:Electricity Invercargill
257:electricity distribution
51:Electricity transmission
1033:Animal Control Products
465:. Electricity Authority
369:"Annual Report 2016-17"
182:. As the owner of the
730:Wellington Electricity
488:Reilly, Helen (2008).
286:electrical substations
236:
211:state-owned enterprise
172:state-owned enterprise
42:State-owned enterprise
932:Electricity Authority
443:. Commerce Commission
332:Electricity Authority
312:Further information:
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215:New Zealand Treasury
1028:Airways Corporation
927:Commerce Commission
873:King Country Energy
582:King Country Energy
572:Eastland Generation
302:Commerce Commission
139:NZ$ 1,481.3 million
25:
901:Paua to the People
781:Nelson Electricity
756:Buller Electricity
607:New Zealand Energy
288:, containing 1116
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856:Flick Electric Co
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806:The Power Company
776:Marlborough Lines
685:The Lines Company
499:978-1-877448-40-9
278:HVDC Inter-Island
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115:1,061.1 million
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385:. The Treasury
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371:. Transpower.
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1038:AsureQuality
1015:Part of the
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912:Pulse Energy
739:South Island
725:WEL Networks
653:North Island
645:Distribution
627:Transmission
489:
467:. Retrieved
457:
445:. Retrieved
435:
421:
409:. Retrieved
407:. Transpower
405:"What we do"
399:
387:. Retrieved
377:
329:
324:power system
317:
299:
290:transformers
269:
238:
209:to become a
207:corporatised
200:
167:
163:
162:
134:Total equity
122:Total assets
74:Headquarters
38:Company type
20:
18:
891:Nova Energy
761:EA Networks
660:Centralines
612:Nova Energy
551:New Zealand
151:.transpower
85:New Zealand
1098:Categories
1083:Transpower
1063:MetService
947:Transpower
877:megaEnergy
837:Ecotricity
705:Top Energy
690:Northpower
635:Transpower
617:Top Energy
559:Generation
514:Transpower
447:13 October
411:12 October
350:References
188:generation
93:Key people
79:Wellington
908:Powershop
811:Westpower
771:MainPower
700:Scanpower
469:18 August
170:) is the
1058:Landcorp
1048:KiwiRail
801:OtagoNet
389:15 March
338:See also
273:one line
48:Industry
1073:NZ Post
898:P2power
695:Powerco
675:Electra
144:Website
104:Revenue
64: (
56:Founded
1053:Kordia
868:GLOBUG
825:Retail
715:Vector
496:
261:Vector
796:Orion
265:Orion
494:ISBN
471:2022
449:2011
413:2011
391:2014
263:and
247:and
196:grid
168:TPNZ
113:NZ$
66:1994
59:1994
155:.nz
153:.co
149:www
1100::
358:^
334:.
82:,
999:e
992:t
985:v
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502:.
473:.
451:.
415:.
393:.
271:(
166:(
68:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
