MISO said it will push back a contentious filing for a new, marginal approach to capacity accreditation into early next year.

Stakeholders remain frustrated with MISO’s plan to enact a marginal capacity accreditation as staff insist that the approach will measure the true value of capacity.

State regulators of MISO South are withholding support for MISO’s plan to implement a sloped demand curve in its capacity auctions based on a proposed option for states to shield themselves from the effects.

MISO is holding to its plan to enact a widescale marginal capacity accreditation while swapping risky hours for peak load to calculate its reserve margin requirements.

In the wake of MISO’s first seasonal capacity auction, members have asked the RTO to improve its generator outage rules, preliminary data sharing and the registry tool used to track capacity.

MISO will evaluate through the end of the year how it can measure and encourage six generating attributes that it says are necessary to its system operations.

MISO said that a sloped demand curve applied to its recent seasonal auction would have boosted summer clearing prices as much as sixfold.

FERC approved MISO’s reworked ratio for use in its capacity auction a day before MISO began accepting offers on the postponed auction.

MISO’s attempt to justify a new resource accreditation process gave way to heated debate over how to best alleviate the footprint’s reliability challenges.

Less than a year after it got permission to debut a new availability-based accreditation, MISO is proposing to reformulate how it accredits its resources.