The new year’s frigid temperatures resulted in a new winter peak demand for ERCOT Wednesday morning.
The ISO recorded a preliminary peak of 62.86 GW between 7 and 8 a.m., when freezing temperatures covered much of the state, exceeding Tuesday’s evening peak of 61.95 GW. Both broke the previous winter mark of 59.65 GW, set almost a year ago on Jan. 6, 2017.
ERCOT had more than 70 GW of capacity available during the morning hours. The ISO in November projected a winter peak of just over 61 GW and said it would have as much as 81 GW of total resource capacity on hand to meet demand.
Wholesale prices peaked at $70.02/MWh during the interval ending at 9:30 a.m. but were as low as $32.40 in the early morning hours. Tuesday’s prices peaked at $72.26 during the interval ending at 6 p.m.
ERCOT has not taken any extreme measures in meeting the winter demand.
Frigid conditions on the East Coast also brought PJM a peak load of 136.13 GW, the RTO’s highest winter demand since 2015. After a slight warming trend PJM, expects the extreme cold to return again later this week and has issued cold weather alerts for Friday and Saturday.
— Tom Kleckner