Energy Management System of a PV-Based Grid-Connected Electric Vehicle in Bangladesh

A growing percentage of the transportation demand is being met by internal combustion vehicles powered by fossil fuels, which has a detrimental effect on the environment. As electric vehicles (EVs) are free from toxic gases and are easy on passengers, they’re becoming increasingly popular. However, these EVs have a negative impact on the grid. Consequently, there is an immense demand for a charging station powered by renewable energy. In this study, a grid-connected, solar photovoltaic (PV) array-powered, residential EV charger that serves the needs of EVs, DC load, and the grid is proposed in the context of Bangladesh. Here we’ve implemented an existing modified perturb and observe algorithm. A technique for energy management based on DC-link voltage regulation has been used. The method was validated using MATLAB/SIMULINK. In islanded mode, the PV array produced power is distributed among the load and EV battery. The EV drains to meet the load demand if the PV array power is inadequate, and the EV battery charges if the PV array power is adequate. However, the grid-connected mode is active if the PV power is not there. According to the need, the EV can function in both G2V (Grid to Vehicle) and V2G (Vehicle to Grid) modes. The charger is additionally actively filtered to maintain the grid current’s total harmonic distortion below 5%.