Annual Planning Report 2012 - Transpower

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Chapter 6: Grid Backbone6.3 North Island grid backbone overview6.3.1 Existing North Island transmission configurationThe North Island grid backbone comprises the:220 kV circuits from Wellington to Auckland located along the Central NorthIsland corridor220 kV Wairakei Ring circuits (220 kV circuits between Wairakei andWhakamaru) connecting the major hydro and geothermal generation in theCentral North Island to the transmission network, and220 kV circuits from Bunnythorpe to Huntly through Stratford connecting Taranakigeneration to the transmission network.Power flows either north or south on the inter-island HVDC link, depending on thetime of day or year. During daylight periods and normal rainfall patterns in the SouthIsland, power tends to flow north. In non-peak periods (late evenings and earlymornings) and years of low South Island rainfall, power tends to flow south.Figure 6-1 shows a simplified schematic of the existing North Island grid backbone.2012 Annual Planning Report © Transpower New Zealand Limited 2012. All rights reserved. 41
Chapter 6: Grid BackboneFigure 6-1: North Island grid backbone schematicOtahuhuTakaniniGlenbrookDruryHuntlyOhinewaiHamiltonTe KowhaiWhakamaruAtiamuriOhakuriTaumarunuiPoihipiTokaanuWairakeiRangipoStratfordTangiwaiBrunswickBunnythorpeLintonKEY220 kV CIRCUIT220 kV SUBSTATION BUSHaywardsGENERATORCAPACITORTEE POINTWilton422012 Annual Planning Report © Transpower New Zealand Limited 2012. All rights reserved.
Page 2: ForewordForeword to the Annual Plan
Page 6 and 7: Executive SummarySummary Figure 1:
Page 8 and 9: Executive SummaryFeedbackWe will be
Page 10 and 11: Table of contents2012 Annual Planni
Page 12: Chapter 1: Introduction1 Introducti
Page 15: Chapter 1: IntroductionStatusBase C
Page 18 and 19: Chapter 3: Facilitating New Zealand
Page 20: Chapter 3: Facilitating New Zealand
Page 23 and 24: Chapter 2: Facilitating New Zealand
Page 25 and 26: Chapter 3: Existing National GridFi
Page 27 and 28: Chapter 3: Existing National Grid3.
Page 29 and 30: Chapter 3: Existing National GridPr
Page 31 and 32: Chapter 3: Existing National GridFi
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Page 35 and 36: Chapter 4: Demand Assumptionsmethod
Page 37 and 38: Chapter 5: Generation AssumptionsTa
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Page 41: Chapter 6: Grid Backbone6 Grid back
Page 45 and 46: Chapter 6: Grid BackboneFigure 6-2:
Page 49 and 50: Chapter 6: Grid BackboneThe North A
Page 53 and 54: Chapter 6: Grid BackboneWairakei-Oh
Page 55 and 56: Chapter 6: Grid BackboneOutagesThe
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Page 71 and 72: Chapter 6: Grid Backbonereinforcing
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Chapter 7: Northland RegionFigure 7
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Chapter 7: Northland RegionSolution
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Chapter 7: Northland Regiona shared
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Chapter 7: Northland RegionSolution
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Chapter 7: Northland RegionThe peak
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Chapter 7: Northland RegionTable 7-
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Chapter 7: Northland RegionBoth 110
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Chapter 8: Auckland Region8 Aucklan
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Chapter 8: Auckland Region8.2.1 Tra
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Chapter 8: Auckland Regionor demand
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Chapter 8: Auckland RegionFigure 8-
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Chapter 8: Auckland RegionTable 8-3
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Chapter 8: Auckland RegionFigure 8-
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Chapter 8: Auckland RegionNorth Auc
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Chapter 8: Auckland RegionIn additi
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Chapter 8: Auckland RegionSee also
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Chapter 8: Auckland RegionTable 8-1
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Chapter 8: Auckland Region8.10.2 Au
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Chapter 9: Waikato RegionThe Waikat
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Chapter 9: Waikato Region668 MW by
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Chapter 9: Waikato RegionTable 9-3:
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Chapter 9: Waikato Region9.8 Waikat
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Chapter 9: Waikato Regionfull gener
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Chapter 9: Waikato RegionTable 9-7:
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Chapter 9: Waikato Regiona total no
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Chapter 9: Waikato RegionTable 9-11
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Chapter 9: Waikato RegionIssueTwo 1
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Chapter 9: Waikato RegionTable 9-15
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Chapter 9: Waikato Regionproposing
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Chapter 10: Bay of Plenty RegionThe
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Chapter 10: Bay of Plenty Region10.
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Chapter 10: Bay of Plenty RegionGri
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Chapter 10: Bay of Plenty RegionFig
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Chapter 10: Bay of Plenty RegionWe
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Chapter 10: Bay of Plenty RegionFig
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Chapter 10: Bay of Plenty Region10.
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Chapter 10: Bay of Plenty RegionInd
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Chapter 10: Bay of Plenty RegionOut
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Chapter 10: Bay of Plenty Regionn-1
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Chapter 10: Bay of Plenty RegionFol
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Chapter 11: Central North Island Re
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Chapter 12: Taranaki Region12 Taran
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Chapter 12: Taranaki RegionWe have
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Chapter 12: Taranaki Regionand expo
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Chapter 12: Taranaki RegionFigure 1
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Chapter 12: Taranaki Regiontiming o
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Chapter 12: Taranaki RegionTable 12
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Chapter 12: Taranaki Regiondepends
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Chapter 13: Hawke’s Bay RegionThe
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Chapter 13: Hawke’s Bay RegionFig
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Chapter 13: Hawke’s Bay RegionFig
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Chapter 13: Hawke’s Bay Regionove
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Chapter 14: Wellington RegionThe We
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Chapter 14: Wellington Regionused t
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Chapter 14: Wellington RegionDescri
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Chapter 14: Wellington Region14.8 W
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Chapter 14: Wellington RegionThe tw
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Chapter 14: Wellington Regioncircui
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Chapter 14: Wellington Region14.8.8
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Chapter 14: Wellington Regionn-1 ca
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Chapter 14: Wellington RegionThis i
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Chapter 15: Nelson-Marlborough Regi
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Chapter 16: West Coast RegionThe We
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Chapter 16: West Coast Regionapprop
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Chapter 16: West Coast Region16.6 F
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Chapter 16: West Coast RegionSoluti
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Chapter 16: West Coast RegionIndica
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Chapter 16: West Coast Regionstage
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Chapter 17: Canterbury RegionThe Ca
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Chapter 17: Canterbury RegionFigure
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Chapter 17: Canterbury RegionTable
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Chapter 17: Canterbury RegionTwo 66
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Chapter 17: Canterbury RegionIsling
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Chapter 18: South Canterbury Region
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Chapter 19: Otago-Southland Region1
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Chapter 19: Otago-Southland RegionL
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Chapter 19: Otago-Southland RegionG
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Chapter 19: Otago-Southland RegionD
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Chapter 19: Otago-Southland RegionW
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Chapter 19: Otago-Southland Region1
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Chapter 19: Otago-Southland RegionW
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Chapter 19: Otago-Southland RegionI
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Chapter 19: Otago-Southland RegionT
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Appendix A: Grid Reliability Report
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Appendix B: Grid Economic Investmen
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Appendix C: Fault LevelsAppendix CF
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Appendix C: Fault LevelsGrid exit p
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Appendix D: Project CalendarTable D
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Appendix D: Project CalendarForecas
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Appendix E: Investment Approvals Pr
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Appendix F: Grid Support ContractsF
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Appendix F: Grid Support ContractsF
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Appendix G Generation ScenariosAppe
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Appendix G Generation ScenariosYear
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MWAppendix G Generation Scenarios14
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MWAppendix G Generation ScenariosYe
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MWAppendix G Generation ScenariosG.
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MWAppendix G Generation ScenariosIn
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MWMWMWAppendix G Generation Scenari
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Appendix H: Project NamingAppendix
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Appendix I: GlossaryAppendix IGloss
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Appendix I: GlossaryTermgeneratorgr
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Appendix I: GlossaryTermsteady stat
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Appendix J: Grid Exit and Injection
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Annual Planning Report 2012 - Transpower

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