Annual Planning Report 2012 - Transpower

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Chapter 3: Existing National GridFigure 3-3: Load, Generation and the Grid BackboneMany of New Zealand’s larger population centres are located in the North Island,while a significant amount of hydro generation is located in the South Island.Power flow tends to be from south to north during normal rainfall years, deliveringpower from the hydro generation in the South Island to the North Island through theHVDC link, which also balances demand between the islands. North to southtransfers have been occurring for longer periods in recent years. They occur morefrequently during dry years where hydro generators in the South Island try toconserve water.Figure 3-4 shows New Zealand’s electricity demand as seen at grid exit points (i.e.this includes distribution network losses but not demand supplied by generationembedded within these networks). Demand has been flat over the last 7 yearsparticularly when compared with the strong growth seen in earlier decades. In recentyears demand has been affected by the ongoing impacts of the global recession, thewinter savings campaign in 2007, a reduction in demand at Tiwai Aluminium Smelterin 2008 and the impact of the Christchurch earthquakes.2012 Annual Planning Report © Transpower New Zealand Limited 2012. All rights reserved. 29
Chapter 3: Existing National GridFigure 3-4: New Zealand energy use for last seven years302012 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
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Page 29: Chapter 3: Existing National GridPr
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Page 35 and 36: Chapter 4: Demand Assumptionsmethod
Page 37 and 38: Chapter 5: Generation AssumptionsTa
Page 39 and 40: Chapter 5: Generation AssumptionsTr
Page 41 and 42: Chapter 6: Grid Backbone6 Grid back
Page 43 and 44: Chapter 6: Grid BackboneFigure 6-1:
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
Page 57 and 58: Chapter 6: Grid BackboneFor high le
Page 59 and 60: Chapter 6: Grid BackboneSystem cond
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Page 63 and 64: Chapter 6: Grid Backboneand Welling
Page 65 and 66: Chapter 6: Grid BackboneFigure 6-10
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Page 71 and 72: Chapter 6: Grid Backbonereinforcing
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Chapter 6: Grid BackboneWith regard
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Chapter 6: Grid BackboneThe connect
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Chapter 6: Grid BackboneWe anticipa
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Chapter 7: Northland RegionThe Nort
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Chapter 7: Northland RegionNo new t
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Chapter 7: Northland RegionGrid inj
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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 RegionPatea (3
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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 RegionWe
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Chapter 13: Hawke’s Bay Regiona n
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Chapter 13: Hawke’s Bay Regioncir
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Chapter 13: Hawke’s Bay RegionTab
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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 RegionS
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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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