Largest US Power Grid Details Price Spikes, Warns on Record Demand
PJM, the largest U.S. electric grid operator, is experiencing record-breaking demand and price spikes, particularly in its Virginia zone, due to a heat wave and surging energy consumption from data centers. The grid operator has issued alerts to power plants, bracing for record demand and warning of transmission line congestion and potential rotating outages. Similar strains are noted in New York and the Midwest.
PJM Interconnection, the largest U.S. electric grid operator, reported significant price spikes and warned of massive transmission line congestion in anticipation of record-breaking demand. The surge, driven by a heat wave ahead of July 4, particularly impacted PJM's Virginia zone, home to a large concentration of data centers. Spot wholesale electricity prices in Virginia soared to over $600 per megawatt hour on Wednesday afternoon.
The grid demand reached over 160 gigawatts, nearing its all-time high of 165.5 GW, with forecasts predicting a new record of 166.3 GW on Thursday evening. PJM, which serves 67 million people across the Mid-Atlantic, South, and Washington, D.C. areas, has been struggling to upgrade its system due to increasing consumption from data centers and electric vehicles. The operator issued alerts, urging power plants to maximize output and prepare offline generators, and signaled a higher risk of rotating outages due to weakening transmission line voltage.
Georg Rute, CEO of Gridraven, highlighted that extreme heat, low wind, and surging demand are simultaneously straining transmission lines, contributing to rising electricity prices. Similar strains were reported by New York ISO (NYISO), which asked customers to reduce energy use, and the Midcontinent Independent System Operator (MISO), which also anticipated record demand in the Midwest. PJM expects spot prices to exceed $1,000 per MWh as it manages congestion around Virginia's data center hub, relying heavily on expensive gas and coal-fired plants, with coal generation reaching 22% of supply.