The Operation of a Battery Storage System to Avoid Overvoltages in a Low Voltage Grid

For temporary overloadings in power grids, battery storage systems can be an alternative to grid expansion. In the research project ”Hybrid-Optimal”, this concept was tested in a low voltage grid in Germany. A hybrid battery storage system was operated to prevent overvoltages in an area with significant decentral PV generation. In this paper, the algorithm and the software environment are presented and explained. Additionally, measurement data of a test period is analysed and evaluated. The battery system was able to fulfil its task in general during the test period. On several days, unintentional battery states occurred, corrective measures are thus discussed in the paper.