Proposed Revision Request Detail Help
PRR Life Cycle*********Closed
PRR Details
PRR #
1473
Title Flexible ramping product deliverability
Date Submitted 10/13/2022 4:46 PM
PRR Category B
Priority Emergency
Owner Fox, Jacob (CAISO)
Status Closed
Status End Date 4/18/2023 11:59 PM
Related BPM Market Operations
BPM Section Section 3.2, 7.1.3, 7.10; Appendix section N has been added
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Existing Language

​See attached

Proposed Language

See attached​

Reason For Revision

Updating BPM to reflect calculation and report changes due to the the Flexible Ramp Product Deliverability Policy Initiative

Targeted for 2/1/2023 release.

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

Fox, Jacob (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

N/A
Action

Approve the BPM PRR as submitted

Approve the BPM PRRR as submitted
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

2/1/2022
Other recommended actions

N/A
Click here to view the Final Decision for this PRR
Final Decision

BPM changes approved as submitted.
Stakeholder Comment

One comment, no objections

Effective Date

2/1/2023
Action

Adopt the recommendation as originally issued

Adopt BPM changes as submitted
Announcements
Additional changes have been added to the BPM in section 7.1.3 to addressing binding interval and sufficiency test timing. The incremental changes are highlighted in yellow.
Posted On - 3/10/2023 2:25 PM
Additional change has been added to 7.1.3.1 for enforced transmission constraints at initial release
Posted On - 1/23/2023 10:12 AM
Additional changes have been added
 - 7.1.3.1 regarding the enforced transmission constraints at initial release
- 7.1.3.1.3 detail was added for data posting and API service
- Appendix section N contains additional detail on market logic when dynamic regression is unavailable.
Posted On - 12/14/2022 9:08 AM
Impact Analysis
Impact Analysis not available.
Initial Comments
No Initial Comments available for this PRR.
Recommendation Comments
PacifiCorp appreciates the CAISO’s work on the improvements to the Flexible Ramping Product (FRP) and looks forward to the upcoming implementation. After recent conversations with CAISO staff on the FRP, PacifiCorp kindly asks the CAISO to consider adding language to clarify how resources’ eligibility to provide FRP may be affected by the deployment scenarios. The August 15, 2022 Tariff Amendment to Refine Flexible Ramping Product states on page 9, “The market optimization will make uncertainty awards to a resource only if its flexible ramping award is deliverable in the base case, in the case where the market calls on all upward flexible ramping product, and in the case where the market calls on all downward flexible ramping product.” This sentence indicates that a resource will only be awarded FRP if it is dispatchable in the base case and both deployment scenarios. It is PacifiCorp’s understanding that a resource can be awarded FRP Up if it is deployable only in the upward uncertainty deployment scenario, and a resource can be awarded FRP Down if it is deployable only in the downward uncertainty deployment scenario. While there may be language in other FRP documents that describes how resources’ eligibility is affected by the deployment scenarios, it is PacifiCorp’s opinion that clear language in the BPM would be best for all market participants.

Furthermore, PacifiCorp asks the CAISO to clarify how FRU/FRD requirements are allocated to load, solar and wind resources. In the Draft Technical Description – Flexible Ramping Product Procurement and Deployment Scenarios in section 4.11 Flexible Ramp Deployment Scenarios, the CAISO states “The distribution of the FRU/FRD requirements in the ACPF solution is divided among load, solar and wind resources using allocation factors derived from historical data that reflect the relative contributions of these resource classes to the net demand forecast uncertainty.” This is consistent with PacifiCorp’s understanding of how the FRU/FRD requirement is distributed. However, also in section 4.11 Flexible Ramp Deployment Scenarios, the CAISO states “The distributions of these requirement components are to the solar and wind VERs in the respective BAA or BAA group pro rata on the available VER maximum capacity.” This statement conveys a different understanding as to how the FRU/FRD requirement is distributed to solar and wind resources. A pro rata distribution based on available VER maximum capacity does not seem to be the same as “relative contributions of these resource classes to the net demand forecast uncertainty”. It is PacifiCorp’s opinion that clear language in the BPM will be best for all market participants as it will not cause entities to come to different conclusions as to how FRU/FRD is distributed to load, solar and wind resources.
1/24/2023 3:22 PM
Logged By - Vijay Singh (PacifiCorp)
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The energy, upward flexible ramping capacity and downward flexible ramping capacity awards are co-optimized at the same time with the constraints of the base, upward flexible ramping deployment scenario and downward flexible ramping deployment scenario.

The appendix should provide the information to the second question.
3/27/2023 9:28 AM
Responded By - Fox, Jacob (CAISO)
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# of Appeals Closed - 0
# of Appeals Abandoned - 0
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