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The Texas Heat Wave Reveals Electricity Grid Congestion Issues

Charlie Brooks

May 18, 2022 10:14

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A plea over the weekend for Texans to limit their air conditioner and appliance use after six power plants went down reveals a weakness in the state's grid: transmission line congestion.


Since last year's February freeze, which caused more than 200 deaths amid widespread blackouts and power-price hikes that forced at least five power marketers into bankruptcy, power system reliability has been a concern. Electric Reliability Council of Texas (ERCOT), the state's grid operator, established obligatory reliability criteria for utilities to prevent future disruptions.


In contrast to natural gas shortages and frozen power plants, the weekend power alert had nothing to do with fuel availability. According to the state, six power plants producing 2,900 megawatts of energy "trip off," triggering the caution.


According to energy analysts, the consequent wholesale prices of almost $4,000 per megawatt hour in Houston and negative prices 150 miles (241 kilometers) distant demonstrated that power was unable to meet demand elsewhere.


According to Ramanan Krishnamoorti, chief energy officer at the University of Houston, pricing anomalies and negative prices may have resulted from transmission issues.


According to Joshua Rhodes, a research associate at the University of Texas at Austin Energy Institute and Webber Energy Group, the likelihood of many power plants being offline for their own unique reasons is vanishingly unlikely.


ERCOT declined to make an official request for comment on Monday, and a spokesman refused to identify the cause of the shutdown of six power facilities. The operator stated that it will have enough power for the state this summer.


Neal Dikeman, a partner at the investment firm Energy Transition Ventures and former director of a smart grid startup that supplies power flow management, predicts that congestion will continue to be a problem in Texas as the summer progresses.


"During the summer, there is often congestion due to people turning on their air conditioners, which causes the temperature limitations of the transmission lines to be reached."

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