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Proposed Revision Request Detail Help
PRR Life Cycle*****Stakeholder Meeting on Recommendation****
PRR Details
PRR #
1627
Title Adding state of charge to flexible ramping awards determination
Date Submitted 4/24/2025 12:34 PM
PRR Category B
Priority Emergency
Owner Martin, Michael (CAISO)
Status Stakeholder Meeting on Recommendation
Status End Date 6/17/2025 11:59 PM
Related BPM Market Operations
BPM Section 6.6.2.3 Stored Energy Management
7.8.2.5 Stored Energy Management for Non Generator Resources in Real-Time
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Existing Language
 

​See Attached

Proposed Language
 

​See Attached​

Reason For Revision
 

Currently, storage resources may be unable to deliver flexible ramping up awards due to lack of state-of-charge.  This PRR update adds the Flex Ramp Up term to the state-of-charge formula, ensuring deliverability from storage resources.  This PRR update also includes a minor correction to Section 6.6.2.3.  This is an emergency PRR with an effective date 4/29/2025​​

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

Martin, Michael (CAISO)
Modified BPM language proposed by the PBM Chnage Management Coordinator

​Approve as submitted.

Identification of the authorship of comments

NA
Action

Approve the BPM PRR as submitted

CAISO responded to questions in a written document attached to the PRR
Statement of apparent requirements of the BPM PRR

NA
Priority and rank for any BPM PRR requiring a CAISO system change

NA
Proposed effective date(s) of the BPM PRR

NA
Other recommended actions

NA
Announcements
This PRR and formula change is scheduled to be implemented June 3, 2025
Posted On - 5/30/2025 11:09 AM
Please see the attached CAISO response to comments. 
Posted On - 5/24/2025 12:01 PM
Please submit comments related to the policy conversation informing PRR 1627 through the commenting tool on the Storage Design and Modeling initiative webpage by May 13.  These comments will inform future policy discussions.
https://stakeholdercenter.caiso.com/StakeholderInitiatives/Storage-design-modeling?_gl=1*2ldky4*_ga*OTM1MTA2MjI0LjE2ODExNDQwOTQ.*_ga_NDS4B4M2WP*MTc0NTg3NjE5MS4yMDEuMS4xNzQ1ODc2MjI0LjAuMC4w 
Posted On - 4/28/2025 3:15 PM
Impact Analysis
Impact Analysis not available.
Initial Comments
CAISO Response to PRR 1627 Comments.docx    
CAISO response attached.
5/24/2025 11:59 AM
Logged By - Hines, Nicole (CAISO)
CalCCA Comments on SOC BPP 1627 May 13 2025.pdf    
Please see attached CalCCA's comments on PRR 1627/SOC calculation.
5/13/2025 4:18 PM
Logged By - S. Linderman (Community Choice Aggregators)
WPTF Comments on CAISO's Proposed SOC AT Modification.pdf    
Please see attached comments.
5/13/2025 1:35 PM
Logged By - Gridwell Consulting for WPTF (Western Power Trading Forum)
PGandE comments on PRR 1627.docx    
The CAISO received written comments from Toddy Ryan at PG&E, attached.
5/6/2025 6:46 AM
Logged By - Hines, Nicole (CAISO)
Recommendation Comments
No Recommendation Comments available for this PRR.
Attachments