Use of batteries to voltage regulation in distribution systems with deep penetration of photovoltaic generation

Abstract

Several benefits are associated with the use of energy storage systems in electric power distribution networks, such as batteries, which one can use to solve voltage regulation problems in power distribution systems with deep penetration of photovoltaic solar generators. In general, these problems are associated with the intermittence of solar energy and can limit the hosting capacity of distribution networks to photovoltaic generators, which have clear advantages from an environmental point of view. In this context, this research proposes to investigate the use of batteries to solve the main problems resulting from the increase in penetration levels of photovoltaic generators in electric power distribution systems: (a) long-term (steady-state) voltage regulation; and (b) short-term voltage regulation. These studies rely on time-series load flow simulations to evaluate the performance of solutions based on batteries' active power support. Furthermore, a battery degradation analysis is provided to show the behavior of the total capacity loss during the time providing these services.