DESIGN AND ANALYSIS OF SOLAR PV BASED MULTIFUNCTIONAL DIGITAL CONTROLLER EV CHARGER

In this study, we offer a fuzzy logic controller-based solar photovoltaic (PV) array powered grid-connected domestic electric vehicle (EV) charger that meets the needs of the EV, household loads, and grid. The charger is programmed to function autonomously, using a PV array to provide uninterrupted charging and electricity to household loads. However, in the absence of a PV array or insufficient PV array generation, the grid-connected mode of operation is demonstrated. Furthermore, the charger supports synchronisation and seamless mode switching management, allowing it to automatically connect and disconnect from the grid without interfering with EV charging or domestic power supply. Additionally, the charger is configured with vehicle-to-home (V2H) power transfer to support local loads in an islanded scenario and vehicle-to-grid (V2G) active/reactive power support to the grid. In order to achieve unity power factor (UPF) operation and total harmonic distortion (THD) of the grid current within 5%, the charger is also programmed to function as an active power filter. Additionally, a sliding mode control (SMC) is used to regulate the dc-link voltage and an energy management method based on dc-link voltage regulation is employed to achieve energy management. A second-order generalised integrator frequency locked loop with dc offset rejection (SOGIFLLDR) is utilised to produce the sinusoidal reference grid current for satisfactory performance under distorted voltage conditions. Designed for a single-phase 230V, 50Hz grid, the charger produced better results than traditional approaches when simulated in a MATLAB/SIMULINK environment