Largest US Grid Saw Nearly 25% Of Power Generation Fail During Christmas Cold Blast

PJM Interconnection, a regional power grid that stretches from Illinois to New Jersey, declared an emergency during Christmas and was on the brink of implementing rolling blackouts for millions of customers due to a partial power-generation fleet shutdown.

The regional power grid operator has over 65 million customers in 13 states and the District of Columbia. It published its first analysis explaining the grid strain when temperatures dove well below freezing due to 23% of its power-generation fleet shuttering on Dec. 24.

About 70% of the 46 gigawatts of outages were due to NatGas-fired power generation going offline, which left the grid operator in dire straits as temperatures continued to plunge and electricity demand soared as customers turned up their thermostats.

Here’s PJM’s report explaining how the cold blast last month nearly sparked an energy crisis.

PJM shows the cold shot lasted between Dec. 23-25.

Temperatures recorded one of the most dramatic drops in a decade.- READ MORE