Data center electricity prices surge 60 times! The largest U.S. power grid activates Level 2 emergency alert, Northern Virginia electricity price breaks $2,500/MWh.

The largest U.S. power grid operator, PJM Interconnection LLC, announced on Friday that it has activated a Level 2 Energy Emergency Alert. Under the triple pressure of sustained high temperatures, widespread generator outages, and severe transmission line overloads, the agency has escalated emergency response measures to prevent widespread blackouts.

PJM has required each utility company within its jurisdiction to reduce power supply to users according to contract agreements. Meanwhile, the U.S. Department of Energy issued a mandatory directive requiring all generating units to operate at full capacity—this is the second time this summer that the department has exercised this authority. PJM's service area covers the Mid-Atlantic region, southern states, and Washington, D.C., supplying power to a total of 67 million people.

In Northern Virginia, home to the world's largest data center cluster, spot wholesale electricity prices have exceeded $2,500 per megawatt-hour this week. Under normal operating conditions, PJM's electricity price is about $40 per megawatt-hour, making the current price 62.5 times higher.

Triple pressure stacked, grid triggers emergency response

PJM announced on its emergency procedures website the activation of EEA2 (Level 2 Energy Emergency Alert), with the official trigger reason being that it can no longer meet expected energy demand.

The immediate factors causing this crisis include: large-scale generator outages, severe overloads on high-voltage transmission lines, and sustained high temperatures in the Mid-Atlantic region driving a sharp increase in air conditioning electricity consumption. Currently, temperatures in most areas of the region have exceeded 100 degrees Fahrenheit (about 38 degrees Celsius).

On the demand side, PJM stated that the instantaneous peak load from 5:00 PM to 6:00 PM on July 2 was approximately 162.7 GW, close to the historical record of 165.563 GW set in August 2006. PJM added that official preliminary peak data will be released after 60 days and will need to incorporate the actual performance of its 6 GW demand response resources for comprehensive calculation.

Transmission congestion drives up electricity prices, data center clusters bear the brunt

The extreme surge in spot electricity prices in Northern Virginia is primarily due to the sharp increase in cross-regional transmission costs caused by high-voltage transmission line congestion. Industry analysts and PJM operational data both point to this factor.

The region is the world's largest concentration of data centers, which are highly sensitive to both power stability and price. The price level exceeding $2,000 per megawatt-hour, compared to the normal baseline of about $40, intuitively reflects the extreme supply-demand imbalance currently faced by the grid.

DOE intervenes again, exercising mandatory power for the second time this summer

The mandatory operation directive issued by the U.S. Department of Energy this time requires all generating units within the jurisdiction to maintain full-load operation, aiming to maximize available generating capacity and alleviate grid pressure. This is the second time this summer that the department has taken such mandatory action, indicating that the impact of extreme high temperatures on the power system has exceeded the response capacity of conventional dispatch measures.

PJM has now escalated response measures to require utility companies to proactively reduce demand, i.e., activate "demand response" contracts pre-signed with users to actively reduce electricity consumption during emergencies, thereby lowering the overall grid load and avoiding uncontrolled blackouts.

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