According to a new report released by Vibrant Clean Energy on behalf of Energy Innovation on August 25, 2020, establishing a regional transmission organization (RTO), an electric power transmission system operator (TSO) that coordinates, controls, and monitors a multi-state electric grid, in the Southeast would generate a cumulative $384 billion in savings by 2040 compared to a business-as-usual scenario.[1] [2] The analysis follows confirmation by utilities like Southern Company and Duke Energy that there are ongoing discussions about forming a Southeast Energy Exchange Market (SEEM). The report did not model a SEEM-based scenario due to a lack of details. Instead, the study presents a scenario where an RTO is established in 2025 to cover seven states that are currently not covered by an RTO or independent system operator (ISO): Alabama, Florida, Georgia, Mississippi, North Carolina, South Carolina and Tennessee. The report maps the effects of a Southeastern RTO from 2025 through 2040.
Under this scenario, an RTO would save customers $17.4 billion a year and lead to the retirement of most coal plants and gas peakers in the region by 2040. The report also found that competitive pricing through an RTO would lead to decarbonization without state policies like carbon pricing and renewable energy mandates. On its current course, the region will about 21 GW of new renewables and storage by 2040. However, competitive pricing from a wholesale market could add 131 GW of clean energy: 52 GW solar, 42 GW wind and 37 GW storage.
[1] https://energyinnovation.org/wp-content/uploads/2020/08/Economic-And-Clean-Energy-Benefits-Of-Establishing-A-Southeast-U.S.-Competitive-Wholesale-Electricity-Market_FINAL.pdf
[2] https://energyinnovation.org/publication/economic-and-clean-energy-benefits-of-establishing-a-southeast-u-s-competitive-wholesale-electricity-market/