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The largest US power grid prepares for record demand with warnings galore

PJM, America's largest electric grid operator, warned on Wednesday of a massive transmission line backlog as it prepared for record-breaking demand due to a heatwave in advance of the July 4th celebrations. PJM, the largest U.S. electric grid operator, warned of massive transmission line congestion and a price spike on Wednesday as it prepared for record-breaking demand driven by a heatwave ahead of?July 4 celebrations. PJM’s low-voltage warning signaled a higher risk of rotating power outages as transmission?lines' voltage levels weakened. Grid operator has also warned power plants that they should bring their generators back into service to be ready for a surge in demand.

Grid expert Georg Rute of Gridraven said that extreme heat, low wind and a surge in demand coincide at a moment when transmission lines are least safe. This is contributing to a spike in electricity prices as the cost to move power increases amid heavy congestion. The temperatures are expected to be around 100deg Fahrenheit (38deg Celsius) this week from Boston to Washington, D.C., close to Northern Virginia's massive data center hub. This will cause a surge in demand for air conditioning, further straining PJM and regional power grids.

PJM will be put to the test at 6 p.m. on Thursday, when demand for grid power is expected to reach 166.3 gigawatts. According to PJM’s latest forecast, this would be a record-breaking demand of 165.6 GW. This was set 20 years earlier. PJM has 18 GW of reserve power that can be turned on within 30 minutes to meet any unexpected shortages. This is about six times higher than the reliability requirements. Spot electricity prices are expected to spike Wednesday evening to over $1,000 per MWh as PJM operators manage the congested powerlines around Virginia's hub of data centers and dispatch expensive power plants, mainly powered by coal and gas to meet day's largest electricity consumption. Another 'electric demand record' could be broken in the Midwest as early as Wednesday evening. The Midcontinent Independent System Operator, the regional grid operator of 15 U.S. States in the Midwest and South, has forecast that demand records as high as 127.1 GW may fall.

(source: Reuters)