PJM Interconnection, the operator of the nation's largest electrical grid, has announced that data centers and other large electricity consumers will face temporary power cuts during shortages. This measure aims to prevent widespread blackouts, with the new curtailment policy set to begin in June 2027.
PJM Grid Operator Addresses Growing Demand
The decision by PJM comes as the rapid expansion of data centers is straining the grid's ability to generate sufficient power. Projections indicate that by 2035, data centers are expected to consume four times the amount of electricity they do today, exacerbating existing challenges for grid operators who have struggled to add adequate generating capacity. A recent auction for new generating capacity reportedly fell short of its targets.
New Curtailment Policy Details
Under the new policy, power cuts will only affect data centers with a capacity of 50 megawatts or larger. PJM is currently conducting another auction to secure additional generating capacity. This demand response program is similar to those already in place for decades, which typically include large industrial users such as manufacturers. Customers experiencing power curtailment will be compensated, with advance notice ranging from 30 minutes to several days, depending on demand forecasts.
Implications for Data Center Operations
The impending power cut policy is anticipated to encourage many new and existing data centers to establish their own on-site power generation capabilities. Facilities without such provisions may rely on backup generators, which are often more expensive to operate and can be more polluting. Diesel generators are frequently favored by data centers due to fuel availability and ease of on-site storage.
Regulatory Scrutiny and Grid Management
Federal regulations permit the use of diesel generators for demand response events for up to 50 hours annually and for emergencies and maintenance for up to 100 hours per year. Recent months have seen PJM facing criticism regarding its management of new generating capacity and the integration of large new energy users, including data centers. The grid operator's service territory extends across 13 states and the District of Columbia, serving 67 million customers. Wholesale electricity prices within PJM's territory have nearly doubled over the past year, with PJM's independent market monitor attributing a significant portion of this increase to the demands of data centers.
