The operator of the nation’s largest electrical grid on April 30 reiterated its system will remain reliable even with the retirements of substantial generation resources. But PJM Interconnection, whose system covers customers in 13 states, said it will conduct a review of its operations over the next several months “to understand the fuel-supply risks in an environment trending towards greater reliance on natural gas.”

PJM wants to know whether its network could still operate reliably in the event of outages from natural disasters such as extreme weather, a cyberattack, or pipeline issues that would curtail the flow of natural gas on its system. The regional transmission organization (RTO) in March 2017 issued a report—”PJM’s Evolving Resource Mix and System Reliability”—that said its system could add more natural gas and renewable power generation and remain reliable, but “heavy reliance on one resource type” could bring risks to grid resiliency.

PJM recently said more than 3,600 MW of generation capacity will retire in its service territory in 2018.…

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