Assumptions for the 2024-2025 TPP

The Integrated Resource Planning (IRP) process develops a resource portfolio(s) annually as a key input to the California Independent System Operator's (CAISO) Transmission Planning Process (TPP) base case studies, which includes a reliability base case portfolio and a policy-driven base case portfolio.  The California Public Utilities Commission (CPUC) may also transmit additional resource portfolios as inputs for sensitivity studies that test the implications of various policy futures.  This page contains documentation relevant to the development and mapping of resource portfolios for the 2024-2025 TPP.

Decision Adopting the 2023 Preferred System Plan and Related Matters, and Addressing Two Petitions for Modification, 02/20/2024

• Administrative Law Judge’s Ruling Seeking Comment on Proposed 2023 Preferred System Plan and TPP Portfolios, 10/05/2023  

• Proposed Decision Adopting 2023 Preferred System Plan and Related Matters, and Addressing Two Petitions for Modification, 01/10/2024

Methodology for Resource-to-Busbar Mapping

The busbar mapping methodology states guiding principles, establishes mapping criteria, and outlines the iterative inter-agency mapping process.

Methodology for Resource-to-Busbar Mapping for the Annual TPP, Ruling version, 10/5/2023

Red-lined Methodology for Resource-to-Busbar Mapping for the Annual TPP (red-lined from the 07/17/2023 draft version), 10/5/2023

Draft Methodology for Resource-to-Busbar Mapping for the Annual TPP, 7/17/2023

Red-lined Methodology for Resource-to-Busbar Mapping for the Annual TPP (red-lined from 01/13/2023 23-24 TPP version), 7/17/2023

Modeling Assumption for 2024-2025 TPP

Modeling Assumption Report for the 24-25 TPP, 03/01/2024

Busbar Mapping

Final Dashboard for the 24-25 TPP Base Case, 02/15/2024

Dashboard for the High Gas Retirement Sensitivity, 02/16/2024

Previous versions of 24-25 TPP Base Case Dashboard:

Dashboard for the Proposed Decision Mapping of the 24-25 TPP Base Case, 01/11/2024

Dashboard for Preliminary Mapping of Proposed 24-25 TPP Base Case, 10/26/2023

• Updated Dashboard for Preliminary Mapping, 12/13/2023

Supplemental Workbooks for Busbar Mapping:

• Overview Slides for Gas Capacity Not Retained Selection Criteria and Summary, 02/15/2024
• Gas Capacity Not Retained Assumption List for the Base Case and Sensitivity Portfolios, 02/15/2024
• CEC Land-use and Environmental Screen Analysis workbooks, 02/15/2024
• Commercial Interest Analysis of CAISO Interconnection Queue, 10/26/2023
• Baseline Reconciliation, 10/26/2023
• Gas Capacity Not Retained Selection Criteria, 01/18/2024

Workshops

IRP Webinar on Busbar Mapping Results for the Proposed 24-25 TPP Portfolios - December 8, 2023:

• Webinar Recording 
• Webinar Q & As
• CPUC Presentation Slides (part 1)
• CEC Presentation Slides: Land-Use Evaluation for the 2024-25 TPP Busbar Mapping  
• CPUC Presentation Slides (part 2)

IRP Workshop on Ruling Proposing 2023 Preferred System Plan and 2024-25 Transmission Planning Process Portfolios - October 20, 2023:

• Link to workshop presentations and recordings

Webinar on Busbar Mapping Methodology Updates - July 18, 2023:

• CPUC Presentation Slides: Draft Updates to the Busbar Mapping Methodology 
• CEC Presentation Slides: Land-Use Evaluation for Busbar Mapping
• Webinar Recording 
• Webinar Q&A

Links to CEC's Final Land-Use Screens Staff Report and Web Mapping Application:

• Link to report: Click here
• Link to web mapping application