The Tennessee Valley Authority (TVA) said it would add natural gas-fired generation fueled by a potential pipeline expansion proposed by ​​Enbridge Inc.’s East Tennessee Natural Gas LLC (ETNG) as it retires a large segment of coal generation. 

TVA, which has floated the proposal of retiring the Kingston Fossil Plant (KIF) since its 2019 Integrated Resource Plan, said by 2027 it would be shuttering all nine units at the coal-fired facility in eastern Tennessee.

In addition to solar and battery storage additions, about 1,500 MW of natural gas-fired capacity from one combined-cycle plant and 16 dual-fuel aeroderivative combustion turbines (aero CT) would replace the retired generation. Aero CTs are able to ramp up faster than conventional simple-cycle CTs as they draw air...