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Massive power disconnect roiled largest US electric grid

Created at 22 Jul · 10:31 PM1 source↑ Market-relevant
IN SHORT

A significant power disconnection occurred on the largest U.S. electric grid, causing a voltage disturbance felt across multiple states. The event, lasting about 10 minutes, underscored concerns about grid stability amid fluctuating demand from data centers and crypto miners.

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Key Numbers

10 minutesduration of grid disturbance
3 gigawattspower demand offline
3%percentage of grid demand offline
1.4 millionsensors recording disturbances

Who's Involved

PJM Interconnection
Operator of the largest U.S. electric grid affected by the event
Bob Marshall
CEO of Ting Labs, which recorded the voltage disturbances
Ting Labs
Company whose sensors recorded the grid disturbances
Massive power disconnect roiled largest US electric grid

↳ Why This Matters

The incident highlights the vulnerability of large electric grids to sudden drops in demand, particularly from energy-intensive sectors like data centers and crypto mining, raising concerns about grid stability and the need for better management strategies.

Key facts

  • A large power disconnection occurred on the largest U.S. electric grid on Wednesday.
  • The event caused a voltage disturbance affecting areas from Washington, D.C., to Chicago.
  • The epicenter was in northern Virginia, a major data center hub.
  • The grid disturbance lasted approximately 10 minutes.
  • Over 3 gigawatts of power demand went offline, representing about 3% of the grid's total demand at the time.
  • Customers reported flickering lights and unusual noises from appliances.

    • A significant power disconnection occurred on the largest U.S. electric grid on Wednesday, causing a voltage disturbance that was felt across multiple states, according to experts and data from grid operator PJM Interconnection.

    The event, which happened around 7:55 a.m. ET in northern Virginia, a major hub for data centers, lasted about 10 minutes before the grid was fully stabilized. Bob Marshall, CEO of Ting Labs, described it as a "massive event" and noted that his company's network of 1.4 million sensors recorded voltage disturbances extending from Washington, D.C., to Chicago.

    PJM Interconnection reported that more than 3 gigawatts of power demand went offline, approximately 3% of the grid's total demand at the time. While PJM registered the sudden drop in demand and a change in grid frequency, it stated there were no impacts to its reliability. Customers in northern Virginia reported flickering lights and noises from appliances, indicating a significant hit to power quality.

    Frequently asked questions

    The cause of the event in PJM Interconnection's territory was unknown at the time of reporting.

    The grid disturbance took about 10 minutes before it was fully stabilized.

    Customers in northern Virginia reported flickering lights and noises coming from their air conditioners and refrigerators.

    PJM Interconnection stated that there were no impacts to its reliability despite the sudden drop in power demand.

    What Happens Next

    01Federal and state regulators are studying measures to better manage sudden drops in demand from data centers and crypto miners.

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    How It Developed

    A massive amount of power disconnected from the largest U.S. electric grid on Wednesday.
    The event caused a voltage disturbance felt from Washington, D.C., to Chicago.
    The epicenter was in northern Virginia, home to a large concentration of data centers.
    The grid disturbance lasted about 10 minutes before stabilization.
    PJM Interconnection reported over 3 gigawatts of power demand going offline, about 3% of total demand.
    Customers in northern Virginia reported flickering lights and noises from appliances.

    Sources

    T1
    Massive disconnect of power roiled largest US electric gridReuters

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