From the story here:
ERCOT blamed forced outages at coal- and natural gas-fed power plants, and low wind power generation. A spokesperson declined to provide details on the number or type of generating plants that were offline and prompted conservation measures. ... As on Monday, it avoided forced cuts when big power consumers agreed to halt operations. Lee Bratcher, president of Texas Blockchain Council, said all of the state's large-scale Bitcoin mining operations, which consume about 1,000 megawatts, are currently offline because of ERCOT's call for conservation and high power prices.
