PJM Interconnection power line failure triggers 3‑GW AI data‑center outage
On July 25 2026 a transmission line managed by PJM Interconnection collapsed near Washington, DC. Within about 30 seconds the outage removed roughly 3.1 GW of load as AI data‑center facilities automatically switched to backup generators, creating a sudden excess of electricity on the grid. The abrupt change drove voltage surges that made lights flicker from Northern Virginia down to Chicago and kept the network unstable for more than ten minutes before normal frequency was restored.
PJM, which coordinates electricity delivery for roughly 67 million customers across the Mid‑Atlantic and Midwest, has recorded a similar event two years earlier that shed about 1.5 GW. The incident highlights the growing strain that large AI‑focused data‑center clusters—concentrated in Northern Virginia—place on the traditional power system.
Industry experts such as Ricardo de Azevedo, CTO of ON Energy, warn that such high‑load, rapid‑response disconnections are becoming increasingly common as AI compute demand expands.
Entities: AI data centers · Northern Virginia · PJM Interconnection · Ricardo de Azevedo · Washington, D.C.
Claims
What the coverage asserts, and how well corroborated each claim is across sources.
- [● 2 SOURCES] AI data‑center facilities automatically switched to backup generators, creating a sudden excess supply on the grid. (supported_article_ids)
- [● 2 SOURCES] The incident kept the grid unstable for more than ten minutes before normal frequency was restored. (supported_article_ids)
- [● 2 SOURCES] The outage removed approximately 3.1 GW of load from the grid within about 30 seconds. (supported_article_ids)
- [○ 1 SOURCE] A similar collapse two years earlier on the same PJM network shed about 1.5 GW of load. (supported_article_ids)
- [○ 1 SOURCE] PJM Interconnection coordinates electricity for about 67 million customers across the Mid‑Atlantic and Midwest. (supported_article_ids)
- [● 2 SOURCES] A transmission line managed by PJM Interconnection collapsed near Washington, D.C. on July 25 2026. (supported_article_ids)
- [● 2 SOURCES] Voltage surged, causing lights to flicker from Northern Virginia to Chicago. (supported_article_ids)
- [● 2 SOURCES] Northern Virginia hosts the world's largest concentration of AI data‑center facilities. (supported_article_ids)