MSC: MISO Recommendation on Energy Replacement on Common Bus Issue submitted by Entergy (20230302)

In the March 2, 2023 meeting of the Market Subcommittee (MSC), stakeholders were invited to review and submit feedback on the MISO Recommendation on Energy Replacement on Common Bus Issue submitted by Entergy. 

MISO recommends categorizing this issue as “Inactive” and evaluating it under the broader Multiple Configuration Resource (MCR) initiative, after internal investigation on the issue submission, discussions with the Independent Market Monitor (IMM) and Entergy, and consideration of potential market impacts and the complexity of implementation.

Multiple factors were considered in developing MISO’s recommendation as described below:

• Potential market impacts: The existing RSG charge generation deviation calculation provisions allow Market Participants to self-supply/replace resources across its portfolio for periods prior to the Notification Deadline (4 hours) with deviations on the failed resource and replacement resource netting against each other.  For periods after the Notification Deadline, MISO may view the common bus replacement resource’s total time-to-start as inadequate and take more expedient action by committing a shorter-lead resource elsewhere in the footprint before the common bus replacement resource can be available. 
• Complexity of implementation: Updates to market systems, settlement processes, and other supporting tools would be required to incorporate the proposed change. Recognizing the complexity of the settlement rules around the RSG charges, a significant amount of time and effort would be required to explore and develop new logic for both the DART and Settlement systems, and further complications would be introduced by the proposed changes.

Please provide feedback by March 17, 2023.