Oct. 17 — In a press release, Curt Morgan, Vistra Energy’s president and chief executive officer, explained the “long-term economic viability of these plants has been in question for some time.” The plants are part of the Electric Reliability Council of Texas (ERCOT) market, which manages electrical power for a majority of the state. Luminant said with more renewable energy in the market and cheaper natural gas prices, their plants have struggled to remain economically competitive.