The California ISO 2022-2023 transmission planning cycle involves key stakeholder activities from 2022 through early 2023. Each year, the ISO conducts its transmission planning process to identify potential system limitations as well as opportunities for system reinforcements that improve reliability and efficiency. The transmission planning process core product is the ISO Transmission Plan, which provides an evaluation of the ISO control grid, examines conventional grid reliability requirements and projects, summarizes key collaborative activities and provides details on key study areas and associated findings.
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Jun 30, 2023 Final study plan posted
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May 18, 2023 Board of Governors approval - transmission plan
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Completed |
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https://stakeholdercenter.caiso.com/InitiativeDocuments/North-of-SONGs-Serrano-500kV-Line-Project-Accrued-Final-Costs.pdf | |
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https://stakeholdercenter.caiso.com/InitiativeDocuments/Imperial-Valley-North-of-SONGs-500kV-Substation-and-Line-Project-Accrued-Final-Costs.pdf
Imperial Valley - North of SONGs 500kV Substation and Line Project - Accrued Final Costs 07/15/2024
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https://stakeholdercenter.caiso.com/InitiativeDocuments/North-Gila-Imperial-Valley-Project-Accrued-Final-Costs.pdf
North Gila - Imperial Valley Project Accrued Final Costs 06/24/2024
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https://stakeholdercenter.caiso.com/InitiativeDocuments/north-of-songs-serrano-500-kv-line-project-sponsor-selection-report.pdf
North of SONGS-Serrano 500 kV Line Project Sponsor Selection Report 05/31/2024
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https://stakeholdercenter.caiso.com/InitiativeDocuments/ImperialValley-NorthofSONGSProjectApprovedProjectSponsorReport.pdf
Imperial Valley-North of SONGS Project Approved Project Sponsor Report 05/09/2024
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https://stakeholdercenter.caiso.com/InitiativeDocuments/NorthGila-ImperialValley2500kVLineProjectSponsorSelectionReport-FinalReport.pdf
North Gila-Imperial Valley 2 500kV Line Project Sponsor Selection Report - Final Report 04/11/2024
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https://stakeholdercenter.caiso.com/InitiativeDocuments/Revised-Schedule-2022-2023-Transmission-Planning-Process-Phase-3-Sequence.pdf
Revised Schedule - 2022-2023 Transmission Planning Process - Phase 3 Sequence 04/08/2024
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Qualified project sponsor applications https://stakeholdercenter.caiso.com/InitiativeDocuments/List-of-Qualified-Project-Sponsor-Applications-North-SONGS-to-Imperial-Valley-500kV-Substation-and-Transmission-Line-Project.pdf https://stakeholdercenter.caiso.com/InitiativeDocuments/List-of-Qualified-Project-Sponsor-Applications-North-of-SONGS-to-Serrano-500kV-Transmission-Line-Project.pdf |
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Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/ISOResponses-Comments-2022-2023TPP-Nov7-2023StakeholderMeeting.pdf
https://stakeholdercenter.caiso.com/InitiativeDocuments/Presentation-2022-2023-Transmission-Planning-Process-Nov-7-2023.pdf
Presentation - 2022-2023 Transmission Planning Process - Nov 7, 2023 11/03/2023
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Qualified project sponsor applications https://stakeholdercenter.caiso.com/InitiativeDocuments/List-of-Qualified-Project-Sponsor-Applications-North-Gila-to-Imperial-Valley-2-500kV-Transmission-Line-Project.pdf |
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Validated project sponsor applications https://stakeholdercenter.caiso.com/InitiativeDocuments/List-of-Validated-Project-Sponsor-Applications-North-Gila-to-Imperial-Valley-2-500kV-Transmission-Line-Project.pdf https://stakeholdercenter.caiso.com/InitiativeDocuments/List-of-Validated-Project-Sponsor-Applications-North-of-SONGS-to-Imperial-Valley-500kV-Substation-and-Transmission-Line-Project.pdf https://stakeholdercenter.caiso.com/InitiativeDocuments/ListofValidatedProjectSponsorApplications-NorthofSONGStoSerrano500kVTransmissionLineProject.pdf |
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Phase 3 - select project sponsor |
Project sponsors submit proposals for transmission solutions that are eligible for competitive solicitation and were approved by the ISO Board in the comprehensive transmission plan at the end of phase 2. |
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Web meeting |
Competitive Solicitation https://stakeholdercenter.caiso.com/InitiativeDocuments/Cost-and-Cost-Containment-Workbook-2022-2023-Transmission-Planning-Process-Phase3.xlsx
Cost and Cost Containment Workbook - 2022-2023 Transmission Planning Process Phase 3 10/10/2023
ISO Responses to Comments Matrix - 2022-2023 Transmission Planning Process Competitive Solicitation 10/10/2023
Key Selection Factors - 2022-2023 Transmission Planning Process 07/07/2023
2022-2023 - Transmission Planning Process Phase 3 Sequence Schedule 06/16/2023
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Phase 2 - conduct technical studies and develop comprehensive plan |
The ISO performs technical studies, and with stakeholders develops an annual comprehensive transmission plan that examines the ISO controlled grid and reliability requirements and identifies mitigation solutions. Transmission mitigation solutions may meet reliability, economic or public policy-driven needs that support state, federal, municipal and county policy requirements and directives.The ISO performs technical studies, and with stakeholders develops an annual comprehensive transmission plan that examines the ISO controlled grid and reliability requirements and identifies mitigation solutions. Transmission mitigation solutions may meet reliability, economic or public policy-driven needs that support state, federal, municipal and county policy requirements and directives. |
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https://stakeholdercenter.caiso.com/InitiativeDocuments/ISO-Board-Approved-2022-2023-Transmission-Plan.pdf
ISO Board Approved 2022-2023 Transmission Plan 05/22/2023
Appendix A - Board Approved 2022-2023 - Transmission Plan 05/22/2023
Appendix B - Board Approved 2022-2023 - Transmission Plan 05/22/2023
Appendix C - Board Approved 2022-2023 -Transmission Plan 05/22/2023
Appendix D - Board Approved 2022-2023 - Transmission Plan 05/22/2023
Appendix E - Board Approved 2022-2023 -Transmission Plan 05/22/2023
Appendix F - Board Approved 2022-2023 - Transmission Plan 05/22/2023
Appendix G - Board Approved 2022-2023 - Transmission Plan 05/22/2023
Appendix H - Board Approved 2022-2023 - Transmission Plan 05/22/2023
Appendix I - Board Approved 2022-2023 - Transmission Plan Revised 08/24/2023
Appendix J - Board Approved 2022-2023 - Transmission Plan 05/22/2023
Appendix K - Board Approved 2022-2023 - Transmission Plan 05/22/2023
Addendum 1 - Board Approved - 2022-2023 Transmission Plan 12/14/2023
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https://stakeholdercenter.caiso.com/InitiativeDocuments/Revised-Draft-2022-2023-Transmission-Plan.pdf
Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix A - Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix B - Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix C - Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix D - Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix E - Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix F - Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix G - Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix H - Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix I - Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix J - Revised Draft 2022-2023 Transmission Plan 05/10/2023
Appendix K - Revised Draft 2022-2023 Transmission Plan 05/10/2023
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Alternatives to Trout Canyon-Lugo 500 kV https://stakeholdercenter.caiso.com/InitiativeDocuments/Letter-Lotus-Infrastructure-Partners-Apr242023.pdf
Letter - Lotus Infrastructure Partners - Apr 24, 2023 05/18/2023
Letter - GridLiance West - May 17, 2023 05/18/2023
Letter - NextEra Resources - May 17, 2023 05/18/2023
Letter - Coalition for Optimization of Renewable Development - May 31, 2023 06/01/2023
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Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/Agenda-2022-2023TransmissionPlanningProcess-Apr11-2023.pdf
Agenda - 2022-2023 Transmission Planning Process - Apr 11, 2023 04/07/2023
Presentation - 2022-2023 Transmission Planning Process - Apr 11, 2023 04/10/2023
Draft 2022-2023 Transmission Plan 04/03/2023
Appendix A - Draft 2022-2023 Transmission Plan 04/03/2023
Appendix B - Draft 2022-2023 Transmission Plan 04/03/2023
Appendix C - Draft 2022-2023 Transmission Plan 04/03/2023
Appendix D - Draft 2022-2023 Transmission Plan 04/03/2023
Appendix E - Draft 2022-2023 Transmission Plan 04/03/2023
Appendix F - Draft 2022-2023 Transmission Plan 04/03/2023
Appendix G - Draft 2022-2023 Transmission Plan 04/03/2023
Appendix H - Draft 2022-2023 Transmission Plan 04/03/2023
Appendix I - Draft 2022-2023 Transmission Plan 04/03/2023
Appendix J - Draft 2022-2023 Transmission Plan 04/03/2023
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Letter received from President Reynolds, CPUC https://stakeholdercenter.caiso.com/InitiativeDocuments/Letter-2022-2023-Transmission-Planning-Process-Jan 13, 2023.pdf
Letter - 2022-2023 Transmission Planning Process - Jan 13, 2023 02/13/2023
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Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/Agenda-2022-2023-Transmission-Planning-Process-Nov 17, 2022.pdf
Agenda - 2022-2023 Transmission Planning Process - Nov 17, 2022 11/15/2022
Presentation - 2022-2023 Transmission Planning Process - Nov 17, 2022 11/16/2022
ISO Responses to Comments - 2022-2023 Transmission Planning Process - Nov 17, 2022 04/11/2023
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View comments |
Web meeting |
Day 2 of a two-day meeting https://stakeholdercenterpub.oa.caiso.com/InitiativeDocuments/Agenda-2022-2023TransmissionPlanningProcess-Sep27-28-2022.pdf
Agenda - 2022-2023 Transmission Planning Process - Sep 27-28, 2022 09/23/2022
Presentation - 2022-2023 Transmission Planning Process - Sep 28, 2022 09/23/2022
GLW Presentation - 2022-2023 Transmission Planning Process - Sep 28, 2022 09/23/2022
PG&E Presentation - 2022-2023 Transmission Planning Process - Sep 28, 2022 09/23/2022
SCE Presentation - 2022-2023 Transmission Planning Process - Sep 28, 2022 09/23/2022
SDGE Presentation - 2022-2023 Transmission Planning Process - Sep 28, 2022 09/23/2022
ISO Responses to Comments - 2022-2023 Transmission Planning Process - Sept 27-28, 2022 11/16/2022
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Web meeting |
Day 1 of a two-day meeting https://stakeholdercenter.caiso.com/InitiativeDocuments/Agenda-2022-2023TransmissionPlanningProcess-Sep27-28-2022.pdf
Agenda - 2022-2023 Transmission Planning Process - Sep 27-28, 2022 09/23/2022
Presentation - 2022-2023 Transmission Planning Process - Sep 27, 2022 09/23/2022
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Reliability assessment https://stakeholdercenter.caiso.com/InitiativeDocuments/2022-2023PreliminaryReliabilityAssessmentResults.zip
2022-2023 Preliminary Reliability Assessment Results 08/15/2022
2022-2023 Final Reliability Results 10/31/2022
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Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/2022-2023TransmissionPlanningProcess-PortfolioTransmittalLetter.pdf
2022-2023 Transmission Planning Process - Portfolio Transmittal Letter 07/01/2022
CAISO Presentation - 2022-2023 Transmission Planning Process - Jul 6, 2022 07/01/2022
CEC Presentation - 2022-2023 Transmission Planning Process - Jul 6, 2022 07/01/2022
CPUC Presentation (Updated) - 2022-2023 Transmission Planning Process - Jul 6, 2022 07/06/2022
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Phase 1 - develop study plan |
In collaboration with stakeholders, the ISO develops and finalizes a study plan that consists of a common set of assumptions for reliability and other planning studies the ISO will perform in Phase 2. The development of a conceptual statewide transmission plan begins in this phase and may be completed during Phase 1 or Phase 2. Stakeholders may also request economic planning studies to assess potential economic benefits (such as congestion relief) in specific areas of the grid. |
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https://stakeholdercenter.caiso.com/InitiativeDocuments/FinalStudyPlan-2022-2023TransmissionPlanningProcess.pdf
Final Study Plan - 2022-2023 Transmission Planning Process 06/30/2022
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Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/ISOResponses-CommentsMatrix-2022-2023TransmissionPlanningProcess-Feb-28-2022.pdf
ISO Responses to Comments Matrix - 2022-2023 Transmission Planning Process - Feb 28, 2022 07/06/2022
Presentation - 2022-2023 Transmission Planning Process - Feb 28, 2022 02/24/2022
Draft Study Plan - 2022-2023 Transmission Planning Process 02/18/2022
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