PRR - 1471

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Initial Comment for PRR - 1471

-By Aditya Chauhan (SCE) (Southern California Edison) on Tuesday, October 18, 2022 9:34:27 AM

Announcement for PRR - 1471

Description: Responses to SCE questions: Aggregate Capability Constraint (ACC) There are instances when the CAISO expects the ACC to be honored and there are instances when the CAISO will issue dispatches in excess of that limitation. The CAISO should clearly state, within the BPM, when each case applies. Additionally, the CAISO must supply SCs with a realtime flag or status such that the resource can program its control systems to either respect or violate its ACC. This will ensure reliability by minimizing the chance of Scheduling Coordinators misinterpreting any CAISO instructions. Answer: CAISO expects the subordinate ACC to be honored except on occasion when there are stressed system conditions, also phrased as a risk of a supply/demand imbalance, which can also be phrased as a risk of shedding firm load. The subordinate ACC penalty price will be set just below the power balance constraint (Please see section 6.6.5.4 of the Market Operations BPM to learn more about the Power Balance Constraint). The market will attempt to use any available capacity by relaxing the subordinate ACC constraint before relaxing the power balance constraint. CAISO will make the appropriate clarifications in the BPM to make this language clearer. Thank you for your suggestion regarding the new realtime flag, CAISO will consider it. Dynamic Limit Tool (DLT) In its filing at the FERC2, the CAISO indicates that dynamic limit submittal is mandatory for every 5 minute interval of every day. The PRR indicates that submitting dynamic limits are optional. Please align the PRR with the proposed tariff. Answer: Thank you. CAISO will make the appropriate language changes in the BPM. Additionally, SCE requests clarification on when an outage card is required. The PRR lists four scenarios when a resource may submit dynamic limits. But it isn’t clear as to when an outage should be submitted. Consider scenario 2: “unavailability of renewable generation”. This vague description suggests that mechanical failure conditions such as inverter failures, loss of source power, or inoperable transformers could properly be reported via the dynamic limit tool because they meet Condition 2 “unavailability of renewable generation”. However, it seems like these conditions are more appropriately reported via an outage. Please clarify when an outage must be submitted. Answer: Scenario 2 states “unavailability of renewable generation due to lack of fuel resource” which implies unfavorable environmental conditions for solar, wind, etc. This paragraph should be understood as the scenarios in where submitting dynamic limits is acceptable. If the reason for the unit outage or derate is not one of these scenarios then an outage card must be submitted. CAISO will make the appropriate explicit clarifications in the BPM. Thank You Mike Rugh (CAISO)
-By Martin, Michael on Thursday, October 27, 2022 9:15:23 AM

Announcement for PRR - 1471

Description: 1/3/2023 Please see implementation edit in the attachment regarding how the CAISO handles missing dynamic limits in FMM
-By Martin, Michael on Tuesday, January 3, 2023 11:41:14 AM

Announcement for PRR - 1471

Description: 1/27/23: Please see edits in the attachment which add more controls around hybrid dynamic limits.
-By Rugh, Michael on Friday, January 27, 2023 1:36:52 PM

Announcement for PRR - 1471

Description: 2/2/23: This BPM edit has been pulled back into Recommendation phase to allow more time for comments and review.
-By Rugh, Michael on Thursday, February 2, 2023 8:46:44 AM

Recommendation for PRR - 1471

Proposed Language:

Approve the BPM PRR as submitted

Apparent Requirement: NA
Priority: NA
Action: Approve the BPM PRR as submitted
Effective Date:
Other Actions: NA

Final Decision for PRR - 1471

Final Decision: Adopt the recommendation as modified
Stakeholder Comment: Stakeholders requested more information on limits.
Action: Adopt the recommendation as modified
Effective Date: 01/31/2023

RSS Feed for Proposed Revision Request - 1471

PRR - 1471

Initial Comment for PRR - 1471

Announcement for PRR - 1471

Announcement for PRR - 1471

Announcement for PRR - 1471

Announcement for PRR - 1471

Recommendation for PRR - 1471

Final Decision for PRR - 1471