Electricity prices in the PJM Interconnection network, which serves 67 million people, have risen above $1000 per megawatt hour due to an unusual heat wave and seasonal maintenance schedules. This situation has arisen from reduced electricity generation due to planned maintenance and increased demand.
Rising Electricity Prices and High Demand
On Tuesday, electricity prices at the western hub of PJM reached $1021 per megawatt hour, more than double the average of the previous day for that hour. Day-ahead prices also rose by 28% on Wednesday to $295.83 per megawatt hour, marking the highest daily average since mid-July.
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PJM has forecasted that electricity demand for Tuesday will reach 112,400 megawatts, which is nearly two-thirds of the historical peak of 165,563 megawatts recorded in 2006. This pressure has arisen from electricity supply, as about 62,000 megawatts of generation capacity have been taken offline due to maintenance schedules.
Upcoming Challenges and Emergency Measures
To address this situation, PJM has issued a maximum generation warning and has maintained capacity advisories on Wednesday. Maintenance of facilities typically occurs from mid-September to early December to prepare for winter. However, commitments to supply electricity to tropical regions in the south and west have put additional strain on the grid.
According to PJM spokesperson Jeffrey Shields, unpredictable weather has reduced the number of suitable days for conducting maintenance or construction on electricity generation and transmission equipment. PJM was also about 36,000 megawatts out of service in September and faced similar pressure in May.
In response to this situation, the U.S. government has issued an emergency order allowing PJM to operate power plants beyond the limits of environmental permits and, if necessary, direct data centers and other large customers to use backup power generation.
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