This report presents the quantitative results of the SBB case study from WP15 of the SURE project, analyzing the potential of SBB’s frequency converters—spread across Switzerland—as virtual redispatch devices to relieve congestion in the Swissgrid transmission network. An integrated grid model and a flexible optimization framework were developed to evaluate different control strategies, showing that optimized coordination (versus default control) can reduce peak loading by 6–14% on average and up to 27% in some scenarios. These reductions are consistent across various scenarios, timeframes, and demand levels, with benefits increasing over time due to growing electrification. The study demonstrates that better coordination between SBB and Swissgrid can enhance grid resilience without additional infrastructure investment, and these findings are fully integrated into the SURE modeling chain and scenario analysis.
