Battery Energy Storage based Approach for Grid Voltage Regulation in Renewable Rich Distribution Networks

Abstract

In consequence to the proliferation of Distributed Energy Resources alongside nonlinear power electronic devices in electrical power distribution systems during recent past, the fluctuations in the grid voltage as well as in the current has elevated to a significant level provoking a higher concern over the capability of utility voltage regulators in delivering power with a higher reliability and higher quality. Vast amount of research is being carried out to unravel this condition and elucidate a potential solution while the current power system is sustaining with the upgrades of certain technological improvements. This paper proposes a method which utilizes a Battery Energy Storage System to be incorporated with a grid connected solar photovoltaic system to facilitate the voltage regulation in the utility side. The battery energy storage system is expected to store energy during high solar photovoltaic generation or low power demanding conditions while supplying energy back to the system during low solar photovoltaic generation or high-power demanding conditions. The modeling and simulation of the proposed system is implemented, and the system performance is investigated for several circumstances with varied solar photovoltaic generation for different battery states.