During the 2021 summer months, when system conditions were more constrained than other times of the year, the ISO identified instances where market schedules exceeded the de-rated limitations of certain interties in the Real-Time Market (RTM), due to transmission outages caused by wildfires, and because of the interplay of scheduling priorities within the ISO's market optimization. The ISO also identified such overscheduling on the interties within its Residual Unit Commitment (RUC) process. This overscheduling results in an overestimation of RTM capacity actually available. To resolve this inconsistency between market results and actual conditions, the ISO must manually curtail schedules to ensure flows are within operating limits. This initiative identifies the reasons why market overscheduling occurred, and proposes changes to specific penalty price parameters to ensure the market is able to resolve similar situations in the future, consistent with actual physical conditions on the grid.
| Proposal Development | Decision | Implementation | Completed/Closed |
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Jan 21, 2022 Draft final proposal posted
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Feb 09, 2022 Joint ISO Board of Governors and WEIM Governing Body approval
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Jun 01, 2022 Activation
Implementation milestones
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Completed |
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https://stakeholdercenter.caiso.com/InitiativeDocuments/Notice-of-Decisional-Classification-Adjustment-Intertie-Contraint-Penalty-Prices-Feb-2022.pdf
Notice of Decisional Classification Adjustment Intertie Contraint Penalty Prices - Feb 2022 02/04/2022
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Web meeting |
https://youtu.be/1Kg9VEuBLwY
Video - Adjustment to Intertie Constraint Penalty Prices - Jan 20, 2022 01/25/2022
Presentation - Adjustment to Intertie Constraint Penalty Prices - Jan 20, 2022 02/07/2022
Draft Final Proposal - Adjustment to Intertie Constraint Penalty Prices 01/21/2022
Draft Tariff Language - Adjustment to Intertie Constraint Penalty Prices 01/21/2022
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View comments |
Web meeting |
https://youtu.be/Zh0TllaIF8o
Video - Adjustment to Intertie Constraint Penalty Prices - Nov 19, 2021 12/10/2021
Presentation - Adjustment to Intertie Constraint Penalty Prices 12/10/2021
Issue Paper and Straw Proposal - Adjustment to Intertie Constraint Penalty Prices 12/10/2021
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