PJM board proposes backstop capacity auction, data center curtailment plans

PJM, the grid operator serving 13 Mid-Atlantic and Midwest states plus Washington, D.C., is moving to deal with a power supply shortfall largely driven by data centers. Its board has proposed a one-time backup power auction this fall to fill a 6.8-gigawatt gap left from its last capacity auction, plus a separate plan that would force large new data centers to cut their power use, or switch to backup generators, when the grid gets close to emergency conditions. Both plans still need approval from federal regulators.

If you live in one of PJM's states, this matters mainly through your electric bill. Data centers already in the queue have been pushing up the price utilities pay for backup power capacity, and those costs get passed to households. PJM's board wants new data centers that don't bring their own power supply excluded from future demand forecasts, which analysts say could help slow those cost increases over time. But critics, including PJM's own market monitor, warn the new backup auction could still raise costs, and that pulling data centers out of emergency-response duty rather than building more actual power plants doesn't fix the underlying supply problem.

None of this requires anything from you directly. But if your utility bill has been climbing and you're in PJM territory, this is part of why: demand from data centers is outpacing new power plant construction, and regulators are still working out how to spread the cost between big commercial users and regular households.