A 3 GW data-center load drop briefly stressed the PJM grid in Northern Virginia
Annual_Judge_7272 · reddit · 2026-07-24
- A Reuters-linked Reddit thread says a transmission-line outage in northern Virginia triggered a sudden disconnect of data centers from the grid.
- More than 3 GW of demand reportedly dropped almost instantly, about 3% of PJM’s load at the time.
- The disturbance was large enough to cause voltage issues and flickering lights for consumers across a wide area, though the grid ultimately stayed up.
- The post argues hyperscale data centers can behave like giant on/off switches, creating a new grid-stability risk as AI and cloud demand keep growing.
- It also notes that regulators are already looking at rules to manage abrupt demand drops from these facilities.
Related event: Power Line Fault Causes 3GW Data Center Load Drop in Northern Virginia(2 posts)→
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