The Federal Energy Regulatory Commission approved a proposal Wednesday from the Southwest Power Pool to deploy "topology optimization," a grid-enhancing technology that could cut congestion costs by as much as $44 million annually. The decision allows SPP, which operates the electric grid across all or parts of 17 states stretching from north Texas to North Dakota, to use circuit breaker reconfigurations rather than ramping up expensive power plants to manage grid bottlenecks. The approach mirrors a similar program that's already delivered significant savings at a neighboring grid operator.
A study by NewGrid, SPP and the Brattle Group found that topology optimization could eliminate historical system operating limit violations for 75% of the constraints examined, with annual congestion cost reductions ranging from $18 million to $44 million. SPP's congestion expenses have averaged $1.6 billion each year over the past three years, according to a joint filing by Evergy, Enel North America and EDF Power Solutions citing the grid operator's market monitor report. Throughout 2025, SPP has averaged 1,382 megawatts of curtailed wind and solar generation, the companies noted. The Midcontinent Independent System Operator, which began using economic topology reconfiguration in 2024, has saved $95 million so far this year through the technology, according to an Aug. 18 staff presentation to MISO's Reliability Subcommittee.
According to SPP's May 21 filing, grid operators have traditionally responded to congestion by redispatching power plants, a method that drives up both production expenses and congestion charges. Under the approved plan, market participants can submit proposals for reconfigurations triggered by power plant outages or grid constraints, or SPP itself may propose a change. The grid operator will evaluate whether each potential reconfiguration benefits the wholesale market as a whole and will assess its impact on grid reliability before greenlighting any adjustment. Evergy, Enel and EDF wrote that reconfigurations "reliably reroute electric flow around congestion by opening or closing circuit breakers," adding that SPP already uses the technique to address reliability problems.
The approval matters because topology optimization represents a faster, cheaper alternative to building new transmission lines or running costlier generators during periods of grid stress. When electricity demand spikes or renewable output surges, grid operators can now redirect power flows by simply opening or closing existing circuit breakers rather than ordering additional generation that may cost far more. FERC commissioners Judy Chang and David Rosner, in separate concurring statements, urged other grid operators to adopt the technology as a tool for better managing power flows, including during extreme weather. Chang called it "an example of the type of advanced transmission technologies that can readily help the U.S. power system quickly integrate more load and generation while reducing costs to all consumers." SPP's plan won support through its stakeholder process and drew backing from Advanced Energy United, the Working for Advanced Transmission Technologies Coalition, and the three utility companies.
The Electric Reliability Council of Texas plans to roll out a topology optimization mechanism early next year, SPP noted in its application. For SPP, the technology offers a path to cut into the $1.6 billion annual congestion bill while reducing the 1,382 MW of renewable curtailments that raise costs for consumers and create reliability risks from potential generation shortfalls. With MISO already banking millions in savings and ERCOT set to follow, topology optimization is moving from pilot project to standard practice across U.S. grid operators seeking to squeeze more capacity from existing infrastructure without the decade-long wait for new transmission.