WFAA - ERCOT issued a conservation alert at 12:39 p.masking Texans to  conserve energyDemand for electricity is currently forecast to outpace  the grid's capacity this afternoonMore:  https://www.wfaa.com/article/news/local/texas/ercot-asks-texans

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Regional transmission organization in Texas The Electric Reliability Council of Texas, Inc. (ERCOT) is an American organization that operates Texas's electrical grid, the Texas Interconnection, which supplies power to more than 25 million Texas consumers and represents 90 percent of the state's electric load. ERCOT is the very first independent system operator (ISO) in the United States and one of nine ISOs in North America.

As the ISO for the region, ERCOT dispatches power on an electrical grid that links more than 46,500 miles of transmission lines and more than 610 generation units.  The Latest Info Found Here  United States Energy Info Administration Electric Power Monthly released the following comprehensive report regarding Texas' Net Generation by Energy Source: Overall (All Sectors), 2010-December 2020, (Thousand Megawatthours), Table 1.

The parts of Texas not on its ERCOT power grid appear to have weathered the  freeze with few outages - The Week

According to an ERCOT report, the significant sources of generating capacity in Texas are gas (51%), wind (24. 8%), coal (13. 4%), nuclear (4. 9%), solar (3. 8%), and hydroelectric or biomass-fired units (1. 9%). ERCOT likewise carries out monetary settlements for the competitive wholesale bulk-power market and administers retail switching for 7 million properties in competitive choice areas.

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Power demand in the ERCOT region is typically greatest in summer, primarily due to cooling use in houses and organizations. The ERCOT region's all-time record peak hour took place on August 12, 2019, when consumer need struck 74,820 MW. A megawatt of electricity can power about 200 Texas homes throughout periods of peak need. [] Expense Magness, CEO of ERCOT, was fired on March 4, 2021, for his function in the 2021 power loss occurrence.

The board said he would serve in those functions for the next 2 months. History [modify] ERCOT brand name used up until 2016. At the start of The second world war, a number of electrical utilities in Texas consented to operate together as the Texas Interconnected System (TIS) to support the war effort. During the war, the grid was interconnected to other states and excess power generation was sent to industries on the Gulf Coast, offering a more trustworthy supply of electrical power for production of metal and other material needed for the war.