Power Grid Proposal Could Cut Electricity to New Data Centers During Shortages

2026-08-18 economy

Valley Forge, Tuesday, 18 August 2026.
America’s largest power grid operator has proposed emergency rules that would cut electricity to newly built, large data centers during power shortages before shutting off power to homes, unless those facilities supply their own energy.

Regulatory Framework and Implementation Timelines

On August 13, 2026, PJM Interconnection submitted a formal proposal to the Federal Energy Regulatory Commission (FERC) establishing a conditional reliability framework for new large electricity consumers [1][4][5]. The filing, designated as Docket ER26-3515, seeks to create the Interim Resource Adequacy Service (IRAS), which mandates that facilities adding at least 50 megawatts of incremental peak demand after June 1, 2027, must secure qualifying new capacity or face potential curtailment [4][5][6]. PJM has requested that these tariff revisions become effective by October 12, 2026, pending regulatory approval [3][4][5]. The proposal aims to transition previous one-off emergency authorities into a permanent mechanism, ensuring that new data center loads do not compromise grid reliability during supply shortages [1][5].

Regulatory Framework and Implementation Timelines

Under the proposed rules, load-serving entities catering to these New Large Loads must designate qualifying new capacity equal to or exceeding the load’s peak demand [5][6]. If this requirement is not met, the uncovered portion of demand is subject to curtailment before Pre-Emergency Load Management Response measures are activated [5][6]. To facilitate this, PJM intends to implement a Large Load Registry to track the location and megawatt draw of every site consuming 50 megawatts or more [1][6]. While PJM will issue reduction directives, the proposal preserves state authority over retail load-reduction implementation, meaning state-regulated arrangements will determine specific compensation and requirements for load reductions [5][6].

Market Impacts and Capacity Shortfalls

This regulatory shift follows a July 2026 capacity auction for the 2028/2029 delivery year where PJM procured 138,318 megawatts of unforced capacity but faced a shortfall of 6,831 megawatts against reliability requirements [5][6]. During that auction, prices hit the FERC-approved cap of $325 per megawatt-day, yet the market still failed to secure sufficient generation [1][5]. The independent market monitor attributed a 75.5% jump in regional power costs to these factors, highlighting the economic strain caused by the imbalance between demand and supply [1][4]. A backstop procurement auction is subsequently scheduled from September 30, 2026, through October 21, 2026, to address the identified capacity gap [1][5].

Market Impacts and Capacity Shortfalls

Long-term forecasts indicate significant pressure on the grid, with PJM projecting approximately 70 gigawatts of new large-load demand by 2038 [1][3][6]. This surge coincides with approximately 15 gigawatts of generation retirements since 2022, creating a substantial deficit that existing infrastructure struggles to accommodate [1][4][5]. In response, PJM proposes excluding new large loads from future capacity auctions starting with the 2029/2030 delivery year, requiring these entities to secure their own qualifying capacity via methods such as Bring Your Own New Capacity [4][5]. This exclusion aims to prevent cost-shifting to existing consumers while ensuring new developments contribute to resource adequacy [5][6].

Grid Stability and Future Preparedness

Recent events underscore the urgency of these measures, particularly a transmission fault in Northern Virginia on July 22, 2026, which caused approximately 3,800 megawatts of data center load to disconnect from the grid [7]. While the grid remained stable, the event produced significant voltage and frequency swings, driving a broader discussion around ride-through requirements for large computational loads [7]. In response to such stability concerns, FERC has directed the North American Electric Reliability Corporation to develop enforceable reliability standards for computational loads [7]. Developers are now advised to address power readiness criteria, including facility response to grid disturbances and load transfer speeds to backup systems, as power strategy and electrical design can no longer be treated as separate systems [7].

Sources

Data Centers Power Grid