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Home > Planning > Transmission Planning > 2015-2016 Transmission Planning Process

2015-2016 Transmission planning process

The California ISO 2015-2016 transmission planning cycle involves key stakeholder activities from 2015 through early 2016. 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.

 

Process status

Board of Governors approval: March 25, 2016
Transmission plan: Complete
Study plan: Complete

Board-approved plan

Appendix B is available on the Market Participant Portal 

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.

Update of 2015-2016 transmission planning process special study on bulk energy storage from 40% to 50% RPS

2015-2016 transmission plan

  • 2015-2016 transmission planning process - board-approved plan and appendices
    Appendix B is available on Market Participant Portal
  • 2015-2016 transmission planning process - revised draft plan and appendices
    Appendix B is available on Market Participant Portal
  • 2015-2016 transmission planning process - draft plan and appendices
    Appendix B is available on Market Participant Portal

Policy-driven and economic assessment

Conceptual statewide plan

Reliability assessment

North of Lugo high voltage mitigation project

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.

 

Study plan

Renewable portfolios