Stakeholder center

2021-2022 Transmission planning process

Started: Feb 18, 2021

Leads
Jeff Billinton

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.

Relevant notices Contact us

Status

Development Decision Implementation Completed/Closed
Mar 31, 2021 Final study plan posted
Mar 17, 2022 ISO Board of Governors approval - transmission plan

Activities

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

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

Newark - NRS HVDC Project - Accrued Final Costs 05/22/2023


Sponsor selection reports

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

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

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

ISO Responses to Comments - 2021-2022 Transmission Planning Process - Accessing Out-of-State Wind Resources - Jun 27, 2022 08/25/2022

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

White Paper - 2021-2022 Transmission Planning Process - Accessing Out-of-State Wind Resources to Meet California Resource Adequacy Requirements - Jun 20, 2022 06/20/2022

View comments


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

ISO Responses to Comments Matrix - 2021-2022 Transmission Planning Process Competitive Solicitation 07/25/2022

Presentation - 2021-2022 Transmission Planning Process - Phase 3 Competitive Solicitation - Apr 20, 2022 04/19/2022


Competitive solicitation

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.


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

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

Appendix F - Draft 2021-2022 Transmission Plan 01/31/2022

Appendix G - Draft 2021-2022 Transmission Plan 02/02/2022

View comments

Web meeting

Agenda - 2021-2022 Transmission Planning Process - Nov 18, 2021 11/16/2021

Presentation - 2021-2022 Transmission Planning Process - Nov 18, 2021 11/16/2021
Written comments deadline extended from December 2 to December 6

View comments

Web meeting

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

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

2021-2022 Final Reliability Assessment Results 10/29/2021

2021-2022 Preliminary Reliability Assessment Results 08/13/2021

Web meeting

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

Presentation - 20-Year Transmission Outlook - May 14, 2021 05/14/2021
This presentation includes information on the 2021-2022 Transmission Planning Process Out of State Wind Sensitivity Study.

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.


Final 2021-2022 Study Plan 03/31/2021

Web meeting

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