Installation of an Electric Vehicle Charging Station Using a Diesel Generator and Solar PV Batteries

In this study, continuous charging in islanded, grid-connected, and DG set connected modes is made possible by a battery, a diesel generator set, a battery energy storage system, a solar PV (Photovoltaic) array, and a grid-based EV charging station (CS). The primary function of the charging station is to use a solar photovoltaic PV array and a BES to recharge the electric vehicles (EV) battery. However, if the storage battery is empty and the solar PV array power is not available, the charging station intelligently draws electricity from the grid or a diesel generator set. However, the power from DG sets is drawn so that it always operates at 80–85% loading to achieve optimal fuel economy under all loading conditions. Furthermore, the generator’s voltage and frequency are managed by the charging station in tandem with the storage battery, eliminating the need for a mechanical speed governor. It also ensures that the power drawn from the grid or DG set is at unity power factor (UPF) even under nonlinear loads. The PCC (Point of Common Coupling) voltage is synchronised with the grid/generator voltage to provide continuous charging. The charging station also carries out active and reactive power transfers from cars to residences, the grid, and other vehicles to increase its operational efficiency. The functionality of the charging station is experimentally examined using the lab-developed prototype.