In its latest Short-Term Energy Outlook (STEO), released on January 14, the U.S. Energy Information Administration (EIA) forecasts that generation from natural gas-fired power plants in the electric power sector will grow by 1.3% in 2020. This growth rate would be the slowest growth rate in natural gas generation since 2017. EIA forecasts that generation from nonhydropower renewable energy sources, such as solar and wind, will grow by 15% in 2020—the fastest rate in four years. Forecast generation from coal-fired power plants declines by 13% in 2020.
During the past decade, the electric power sector has been retiring coal-fired generation plants while adding more natural gas generating capacity. In 2019, EIA estimates that 12.7 gigawatts (GW) of coal-fired capacity in the United States was retired, equivalent to 5% of the total existing coal-fired capacity at the beginning of the year. An additional 5.8 GW of U.S. coal capacity is scheduled to retire in 2020, contributing to a forecast 13% decline in coal-fired generation this year. In contrast, EIA estimates that the electric power sector has added or plans to add 11.4 GW of capacity at natural gas combined-cycle power plants in 2019 and 2020.
Generating capacity fueled by renewable energy sources, especially solar and wind, has increased steadily in recent years. EIA expects the U.S. electric power sector will add 19.3 GW of new utility-scale solar capacity in 2019 and 2020, a 65% increase from 2018 capacity levels. EIA expects a 32% increase of new wind capacity—or nearly 30 GW—to be installed in 2019 and 2020. Much of this new renewables capacity comes online at the end of the year, which affects generation trends in the following year.
Forecast generation mix varies in each of the 11 STEO electricity supply regions. A large proportion of the retired coal-fired capacity is located in the mid-Atlantic area, where PJM manages the dispatch of electricity. EIA forecasts that coal generation in the mid-Atlantic will decline by 37 billion kilowatthours (kWh) in 2020. Some of this decline is offset by more generation from mid-Atlantic natural gas-fired power plants; EIA expects generation from these plants to grow by 23 billion kWh.
In the Midwest, where the Midcontinent ISO (MISO) manages electricity, EIA expects coal generation to fall in 2020 by 33 billion kWh. This decline is offset by an increase in natural gas electricity generation (12 billion kWh) and by nonhydropower renewable energy sources (13 billion kWh). The regional increase in renewables is primarily a result of new wind generating capacity.
The electric power sector in the area of Texas managed by the Electric Reliability Council of Texas (ERCOT) is planning to see large increases in generating capacity from both wind and solar. EIA expects this new capacity will increase generation from nonhydropower renewable energy sources by 24 billion kWh this year. EIA expects the increased ERCOT renewable generation will lead to a regional decline of natural gas-fired generation and coal generation of 14 billion kWh for each fuel source in 2020.
EIA expects these trends to continue into 2021. EIA forecasts U.S. generation from nonhydropower renewable energy sources will grow by 17% next year as the electric power sector continues expanding solar and wind capacity. This increase in renewables, along with forecast increases in natural gas fuel costs, contributes to EIA’s forecast of a 2.3% decline in natural gas-fired generation in 2021. U.S. coal generation in 2021 is forecast to fall by 3.2%.
Principal contributor: Tyler Hodge