PJM Seeks Approval to Prioritize Power Cuts for Large Data Centers
The operator of the U.S.'s largest power grid wants to curtail high-demand facilities that fail to provide their own electricity during shortages.
PJM Interconnection, the operator of the largest power grid in the United States, has asked federal regulators to approve new rules that would prioritize cutting power to large-scale data centers during supply shortages. The proposal targets new, high-demand facilities to protect overall grid reliability as AI-driven energy needs surge.
Under the proposed rules, any new "Large Load" facility—defined as a single site with a peak demand of 50MW or more—that connects to the grid by June 1, 2027, will be first in line for curtailment if it does not provide its own electricity generation or otherwise secure its own supply. This mechanism would allow PJM to shed these specific loads first during periods of extreme stress to prevent wider blackouts.
A Grid Under Pressure
PJM serves approximately 67 million people across 13 states and the District of Columbia. The grid is currently facing a reliability crisis as the energy requirements for AI workloads outpace the five-to-ten-year timeline typically required for transmission and distribution upgrades. This imbalance has manifested in the grid's capacity auctions, which are designed to ensure there is enough power to meet peak demand.
Recent auctions have failed to meet critical reliability standards. In one instance, a PJM capacity auction resulted in a shortfall of approximately 6.8 GW below the 20% installed reserve margin target, signaling that the available power supply is not keeping pace with the rapid expansion of industrial energy users.
Shifting the Burden of Reliability
This proposal represents a structural shift in how AI infrastructure is planned and funded. By making power reliability a condition of connection rather than a guaranteed service, PJM is effectively shifting the burden of grid stability onto the technology companies driving the demand.
According to Lee Tsz-Hin, CEO of CETA System Co., Limited, this move "moves power reliability out of the facilities budget and into the capital plan." For operators, this means that ensuring uptime is no longer just an operational concern but a significant capital expenditure requirement, likely forcing a move toward on-site power generation to avoid the risk of being the first to lose power.
What to Watch
The proposal now awaits approval from federal regulators. If adopted, it will create a strong incentive for data center developers to invest in independent power sources, such as small modular reactors or large-scale battery arrays, to bypass the curtailment list. Industry observers will be watching whether other regional transmission organizations adopt similar "bring your own power" mandates as AI expansion continues to strain the national energy infrastructure.