FERC Approves SPP’s Separate Winter, Summer PRMs
A slide from a 2024 SPP presentation shows the difference between a winter PRM and operating capacity margins. | SPP
Aug 20, 2025
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FERC has approved SPP’s tariff revision that establishes separate planning reserve margins for the summer and winter seasons, saying it will provide “more granularity” by recognizing the reliability differences between the two seasons.
