The California ISO 2021-2022 transmission planning cycle involves key stakeholder activities from 2021 through early 2022. 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.
| Development | Decision | Implementation | Completed/Closed |
|---|---|---|---|
|
Mar 31, 2021 Final study plan posted
|
Mar 17, 2022 ISO Board of Governors approval - transmission plan
|
Completed |
|
|
https://stakeholdercenter.caiso.com/InitiativeDocuments/Addendum-to-Metcalf-and-Newark-Approved-Project-Sponsor-Selection-Reports.pdf
Addendum to Metcalf and Newark Approved Project Sponsor Selection Reports 05/30/2025
|
|
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. |
|
|
|
Accrued final costs https://stakeholdercenter.caiso.com/InitiativeDocuments/Manning-500-kV-Substation-Project-Accrued-Final-Costs.pdf
Manning 500 kV Substation Project - Accrued Final Costs 05/22/2023
Collinsville 500 kV Substation Project - Accrued Final Costs 05/22/2023
Metcalf - San Jose B HVDV Project - Accrued Final Costs 05/22/2023
|
|
|
|
Sponsor selection reports https://stakeholdercenter.caiso.com/InitiativeDocuments/Manning-500-kV-Substation-Project-Project-Sponsor-Selection-Report.pdf
Manning 500 kV Substation Project - Project Sponsor Selection Report 01/23/2023
Collinsville 500 kV Substation Project - Project Sponsor Selection Report 01/23/2023
Metcalf-San Jose B HVDC Project - Project Sponsor Selection Report 03/27/2023
Newark-NRS HVDC Project - Project Sponsor Selection Report 03/27/2023
|
|
|
|
Qualified project sponsors and proposals https://stakeholdercenter.caiso.com/InitiativeDocuments/ListofQualifiedProjectSponsorandProposals-CollinsvilleSubstationProject.pdf
List of Qualified Project Sponsors and Proposals - Collinsville Substation Project 10/24/2022
List of Qualified Project Sponsors and Proposals - Manning Substation Project 10/24/2022
List of Qualified Project Sponsor and Proposals - Metcalf - San Jose B HVDC Project 12/07/2022
List of Qualified Project Sponsor and Proposals - Newark - North Recieving Station HVDC Project 12/07/2022
|
|
|
|
Validated project sponsor applications https://stakeholdercenter.caiso.com/InitiativeDocuments/ListofValidatedProjectSponsorApplications-Newark- NRSHVDCProject.pdf
List of Validated Project Sponsor Applications - Newark - Northern Receiving Station HVDC Project 10/17/2022
List of Validated Project Sponsor Applications - Metcalf - San Jose B HVDC Project 10/17/2022
List of Validated Project Sponsor Applications - Collinsville 500/230 kV Substation Project 09/02/2022
List of Validated Project Sponsor Applications - Manning 500/230 kV Substation Project 09/02/2022
|
|
Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/ISOResponsestoComments-2021-2022TransmissionPlanningProcess-AccessingOut-of-StateWindResources-Jun27-2022.pdf
https://stakeholdercenter.caiso.com/InitiativeDocuments/RequestforExpressionofInterest-AccessingOut-of-StateWindResources.docx
Request for Expressions of Interest - Accessing Out-of-State Wind Resources 08/25/2022
Presentation - 2021-2022 Transmission Planning Process - Jun 27, 2022 06/23/2022
|
View comments |
|
|
https://stakeholdercenter.caiso.com/InitiativeDocuments/ISOBoardApproved-2021-2022TransmissionPlan.pdf
ISO Board Approved 2021-2022 Transmission Plan 03/18/2022
Appendix A - Board Approved 2021-2022 Transmission Plan 03/18/2022
Appendix B - Board Approved 2021-2022 Transmission Plan 03/18/2022
Appendix C - Board Approved 2021-2022 Transmission Plan 03/18/2022
Appendix D - Board Approved 2021-2022 Transmission Plan 03/18/2022
Appendix E - Board Approved 2021-2022 Transmission Plan 03/18/2022
Appendix F - Board Approved 2021-2022 Transmission Plan 03/18/2022
Appendix G - Board Approved 2021-2022 Transmission Plan 04/12/2022
|
|
Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/ISOResponsestoCommentsMatrix-2021-2022TranmissionPlanningProcessCompetitiveSolicitation.pdf
ISO Responses to Comments Matrix - 2021-2022 Transmission Planning Process Competitive Solicitation 07/25/2022
|
|
|
|
Competitive solicitation https://stakeholdercenter.caiso.com/InitiativeDocuments/Key-Selection-Factors-2021-2022-Transmission-Planning-Process.pdf
Key Selection Factors - 2021-2022 Transmission Planning Process 03/21/2022
2021-2022 Transmission Planning Process Phase 3 Sequence Schedule 04/13/2022
San Jose Interests in New CAISO Transmission Lines 07/25/2022
|
|
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. |
|
|
|
https://stakeholdercenter.caiso.com/InitiativeDocuments/RevisedDraft-2021-2022TransmissionPlan.pdf
Revised Draft 2021-2022 Transmission Plan 03/15/2022
Appendix A - Revised Draft 2021-2022 Transmission Plan 03/10/2022
Appendix B - Revised Draft 2021-2022 Transmission Plan 03/10/2022
Appendix C - Revised Draft 2021-2022 Transmission Plan 03/10/2022
Appendix D - Revised Draft 2021-2022 Transmission Plan 03/10/2022
Appendix E - Revised Draft 2021-2022 Transmission Plan 03/10/2022
Appendix F - Revised Draft 2021-2022 Transmission Plan 03/10/2022
Appendix G - Revised Draft 2021-2022 Transmission Plan 03/10/2022
|
|
Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/Presentation-Draft2021-2022TransmissionPlan-Feb072022.pdf
Presentation - Draft 2021-2022 Transmission Plan - Feb 7, 2022 02/04/2022
Draft 2021-2022 Transmission Plan 01/31/2022
Appendix A - Draft 2021-2022 Transmission Plan 01/31/2022
Appendix B - Draft 2021-2022 Transmission Plan 01/31/2022
Appendix C - Draft 2021-2022 Transmission Plan 01/31/2022
Appendix D - Draft 2021-2022 Transmission Plan 01/31/2022
Appendix E - Draft 2021-2022 Transmission Plan 01/31/2022
|
View comments |
Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/Agenda-2021-2022TransmissionPlanningProcess-Nov18-2021.pdf
Agenda - 2021-2022 Transmission Planning Process - Nov 18, 2021 11/16/2021
Presentation - 2021-2022 Transmission Planning Process - Nov 18, 2021 11/16/2021
|
View comments |
Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/Day2Presentation-2021-2022TransmissionPlanningProcess-Sep27-28-2021.pdf
Day 2 Presentation - 2021-2022 Transmission Planning Process - Sep 27-28, 2021 09/23/2021
PG&E Presentation - 2021-2022 Transmission Planning Process - Sep 27-28, 2021 09/23/2021
SCE Presentation - 2021-2022 Transmission Planning Process - Sep 27-28, 2021 09/23/2021
SDGE Presentation - 2021-2022 Transmission Planning Process - Sep 27-28, 2021 09/23/2021
GLW Presentation - 2021-2022 Transmission Planning Process - Sep 27-28, 2021 09/23/2021
|
View comments |
Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/Agenda-2021-2022TransmissionPlanningProcess-Sep27-282021.pdf
Agenda - 2021-2022 Transmission Planning Process - Sep 27-28, 2021 09/23/2021
Day 1 Presentation - 2021-2022 Transmission Planning Process - Sep 27-28, 2021 09/23/2021
|
|
|
|
Reliability assessment https://stakeholdercenter.caiso.com/InitiativeDocuments/2021-2022Final-Reliability-Assessment-Results.zip
2021-2022 Final Reliability Assessment Results 10/29/2021
2021-2022 Preliminary Reliability Assessment Results 08/13/2021
|
|
Web meeting |
http://www.caiso.com/Documents/Presentation-2021-2022TransmissionPlanningProcess-Jul27-2021.pdf
Presentation - 2021-2022 Transmission Planning Process - Jul 27, 2021 07/23/2021
White Paper - 2021 Transmission Capability Estimates for use in the CPUC's Resource Planning Process 07/20/2021
|
View comments |
Web meeting |
Special study https://stakeholdercenterpub.oa.caiso.com/InitiativeDocuments/Presentation-20YearTransmissionOutlook-May14-2021.pdf
Presentation - 20-Year Transmission Outlook - May 14, 2021 05/14/2021
|
|
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. |
|
|
|
https://stakeholdercenter.caiso.com/InitiativeDocuments/Final2021-2022StudyPlan.pdf
Final 2021-2022 Study Plan 03/31/2021
|
|
Web meeting |
https://stakeholdercenter.caiso.com/InitiativeDocuments/ISOResponsestoComments-2021-2022TransmissionPlanningProcess-Feb25-2021.pdf
ISO Responses to Comments - 2021-2022 Transmission Planning Process - Feb 25, 2021 07/27/2021
Draft 2021-2022 Study Plan 02/18/2021
Agenda - 2021-2022 Transmission planning Process - Feb 25, 2021 02/25/2021
Presentation - 2021-2022 Transmission Planning Process - Feb 25, 2021 02/25/2021
|