S. Chaitanya, M. Samuel, E. Mounika, P. Yamani Sai, R. Sudheer Kumar ,T. Sasidhar ,G. Teja

Abstract

This study enables continuous charging in islanded, grid-connected, and distributed generation (DG) set-connected modes through a system comprising a battery, a diesel generator set, a battery energy storage system (BESS), a solar photovoltaic (PV) array, and a grid-based electric vehicle (EV) charging station. The main purpose of the charging station is to recharge the EV battery using the solar PV array and the BESS. However, if the storage battery is depleted and solar power is unavailable, the charging station intelligently draws electricity from the grid or the diesel generator. To ensure optimal fuel efficiency, power from the DG set is utilized to maintain an operating load of 80–85% under various conditions. The charging station also manages the generator's voltage and frequency alongside the storage battery, removing the need for a mechanical speed governor. Additionally, it guarantees that power drawn from the grid or DG set operates at a unity power factor (UPF),