Towards a Set of Bus-Splitting Topologies for Congestion Management

The move towards renewable energy and more interdependent electricity markets, together with increasing demand for electrification in various sectors, is leading to more frequent transmission congestion. As a result, expensive solutions such as redispatch have to be implemented. In the short term, innovative methods to mitigate congestion are needed. To this end, this paper investigates substation bus-splitting topologies. The novel methodology, based on optimization and a dimensionality reduction technique, provides a small set of topologies that reduces redispatch in a scenario. The approach is tested on the German power system in a future scenario. From the results of the study case, transmission system operators can get an idea of the savings potential.