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Proposed Revision Request Detail Help
PRR Life Cycle*********Closed
PRR Details
PRR #
1646
Title Mixed-Fuel Resource FCDS and NQC clarification
Date Submitted 9/29/2025 11:29 AM
PRR Category A
Priority Normal
Owner Mohammed-Ali, Abdulrahman (CAISO)
Status Closed
Status End Date 11/17/2025 11:59 PM
Related BPM Reliability Requirements
BPM Section Table of Contents and Section 6.1.2
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Existing Language
Attached
Proposed Language
Attached​​
Reason For Revision
​Submitted by Susan R. Schneider​, Phoenix Consulting​

Document the CAISO's current practice for determining deliverability status and Net Qualifying Capacity for Mixed-Fuel Resources where both fuel types have been awarded FCDS TPD Allocations, but POI constraints, Local Regulatory Authority (e.g., CPUC) counting rules, and CAISO system limitations prevent them from both being listed as such on the NQC List.
 
Effective date: Effective at end of PRR process.
The CAISO has implemented a complex procedure for managing the shown deliverability status and NQC calculations for Mixed-Fuel Resources where both resources have been found to be fully deliverable but POI constraints, LRA counting rules, and CAISO system limitations prevent them from both being listed as such on the NQC List.  This PRR is needed to document the CAISO's procedure so it is transparent to Interconnection Customers, e.g., for their consideration in making PPA and other commitments for the MFR resources.

 

Click here to view the Recommendation Details for this PRR
BPM PRR Submitter

Mohammed-Ali, Abdulrahman (CAISO)
Modified BPM language proposed by the PBM Chnage Management Coordinator

​​Approve as Modified​

Identification of the authorship of comments

N/A
Action

Approve the BPM PRR as modified.

Approve the BPM PRR as modified.
Statement of apparent requirements of the BPM PRR

N/A
Priority and rank for any BPM PRR requiring a CAISO system change

N/A
Proposed effective date(s) of the BPM PRR

Other recommended actions

Click here to view the Final Decision for this PRR
Final Decision

Adopt the recommendation as modified.
Stakeholder Comment

N/A

Effective Date

12/1/2025
Action

Adopt the recommendation as modified

Announcements
New attachment was uploaded to this PRR with the approved Reliability Requirements Version 80 that should have been attached earlier.
Posted On - 12/17/2025 8:34 AM
New attachment was uploaded to this PRR with 2 corrections highlighted in yellow - page 61.
Posted On - 10/22/2025 12:53 PM
Impact Analysis
Impact Analysis not available.
Initial Comments
• EDF Power Solutions supports this PRR. Clarification on this item is critical to contracting, and unambiguous policy on how deliverability status and Net Qualifying Capacity is determined for mixed-fuel resources. Circumstances where both fuel types have been awarded FCDS TPD Allocations, but POI constraints, Local Regulatory Authority (e.g., CPUC) counting rules, and CAISO system limitations prevent them from both being listed as such on the NQC List are difficult to understand. BPM clarity will provide much desired information.

Submitted by: Raeann Quadro, Gridwell Consulting
10/17/2025 12:39 PM
Logged By - Williamson-Duffney, Joseph (CAISO)
Recommendation Comments
No Recommendation Comments available for this PRR.
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