NYISO must amend its Tariff to establish uniform rules for identifying and compensating reliability-must-run (RMR) generators, FERC ruled Thursday.

PJM says critics of its requests to safeguard capacity for the 2015/16 delivery year ignored the context of its filings with FERC.

PJM wants a one-time waiver to avoid releasing 2,000 MW of capacity for the 2015/16 delivery year, when the RTO fears it may run short of resources due to retirements of coal-fired generation.

PJM officials are seeking to postpone generation retirements — or accelerate planned new generation — to help the RTO ride through potential shortages next winter.