Proposed Revision Request Detail Help
PRR Life Cycle*********Closed
PRR Details
Title Update metered subsystems deviation penalty quantity pre-calculation BPM to resolve excess behind the meter production issue for load following metered subsystems
Date Submitted 1/21/2021 2:47 PM
PRR Category B
Priority Emergency
Owner Corona, Brenda (CAISO)
Status Closed
Status End Date 4/13/2021 11:59 PM
Related BPM Settlements and Billing
BPM Section CG PC MSS Deviation Penalty Quantity Precalculation v5.7.1
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Existing Language

See BPM attached to this PRR

Proposed Language

See BPM attached to this PRR

Reason For Revision

Production issue found with Excess Behind the Meter Production (EBTMP) in relation to Metered Subsystems (MSS). For MSS Deviation Penalty Quantity pre-calculation, meter value intended for MSS generators were nullified.

The solution is to revert any EBTMP changes under MSS Deviation Penalty Quantity Precalculation. EBTMP does not apply to MSS. An MSS must submit generation/load at the citygate pursuant to its MSSA. The patch is already in production and impacts only MSS that is Load Following.


The ISO has implemented a production fix around January 14, 2021. This BPM change accompanies that fix.


The change is effective trade date January 1, 2021, which matches EBTMP initiative’s implementation date. Trade dates that were already settled prior to the production fix will be resettled with the scheduled recalculation for those trade dates.
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BPM PRR Submitter

Corona, Brenda (CAISO)
Modified BPM language proposed by the PBM Chnage Management Coordinator

The ISO proposes no modified BPM language beyond that proposed in the BPM PRR.
Identification of the authorship of comments

No comments were received.

Approve the BPM PRR as submitted

Statement of apparent requirements of the BPM PRR

This BPM PRR contains basic language changes.
Priority and rank for any BPM PRR requiring a CAISO system change

There are no system changes associated with this PRR.
Proposed effective date(s) of the BPM PRR

The ISO proposes an effective date of 1/1/2021 for the BPM revisions.
Other recommended actions

The ISO does not recommend any other actions on this BPM PRR.
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Final Decision

The ISO will adopt the BPM change as proposed in the recommendation.
Stakeholder Comment

 No comments submitted.

Effective Date


Adopt the recommendation as originally issued

No Announcements has been posted for this PRR.
Impact Analysis
Initial Comments
No Initial Comments available for this PRR.
Recommendation Comments
No Recommendation Comments available for this PRR.
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