Data centers may face temporary power cuts to prevent blackouts on largest US grid

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The largest electrical grid in the U.S. has struggled to cope with an onslaught of data centers. Now, after an auction to add more generating capacity fell short, the grid’s operator, PJM Interconnection, has said it will cut off data centers and other large users during power shortages.

The decision arrives as the breakneck pace of data center construction has grid operators scrambling to generate power. Data centers are expected to use four times more electricity as they do today by 2035.

PJM won’t start curtailing supply until June 2027, and the cuts will only apply to data centers that are 50 megawatts or larger. The grid operator is running another auction for new generating capacity.

Similar to other demand response programs, which have existed for decades and typically include large users like manufacturers, the customers who have their power cut will be compensated. Such programs typically give customers advance...

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