Mitigation of undesired influence of micro-PV installations on the Low Voltage network by means of a hybrid storage system

This paper presents an analysis and modeling of a hybrid storage system dedicated for stabilization of a low voltage network (LV). The proposed hybrid storage system is composed of a battery module and an electrolysis module. The second one can be seen as a storage of unlimited capacity. The idea of the system is to stabilize an energy flow through a transformer connecting a middle voltage (MV) and LV network. The motivation of the study is related to the destabilization of the LV by the presence of prosumer micro-PV installations. The achieved results showed that the hybrid storage system was able to ensure a stable operation of the LV. Particularly, it was shown that in summer days, when production from the micro-PV installations was the highest, the hybrid storage system assured LV network stabilization without overflowing the battery module. The proposed numerical model can be used for various types of LV and allows to specify the desired load of the transformer, size of the battery module, and the operating parameters of the electrolysis module.