Stochastic Analysis of Battery Storage Systems Integration to the Real Distribution Network with Variable Penetration Levels of PV Systems

The paper discusses the ongoing trends in distribution systems, such as increasing distributed energy generation combined with small battery storage systems. Distributed energy generation alone has a negative effect on power quality and can cause an increase in power losses in a situation with no consumption at a close distance. However, the situation with battery storage systems integration is far more beneficial for the consumers and the distribution system operator. The article presents a stochastic approach for analyzing such situations in low voltage networks. A real case study in a rural low voltage grid in the Slovak Republic with small photovoltaic rooftop systems combined with battery storage systems is performed. The analysis results show a significantly positive effect of battery storage systems on power quality and losses in the observed distribution grid.