The majority of the unexpected power plant outages are from “thermal” sources, which in Texas are largely powered by natural gas plants. Of the approximately 12,000 megawatts of generation forced offline Monday, about 9,600 megawatts, or nearly 80% of the outages, were from thermal power sources, according to ERCOT.
Less than 500 megawatts of thermal generation offline on Monday were planned to be out for maintenance, ERCOT officials said.
Power from wind turbines on Monday afternoon was between 3,500 to 6,000 megawatts, according to ERCOT, which was 1,500 megawatts lower than what the grid operator typically expects during the peak time of usage in the summer afternoons. ERCOT officials said wind output will likely increase as the week continues.