Three Phase Grid Connected PV Based EV Charging Station With Capability of Compensation of Reactive Power

This paper presents a three-phase grid interfaced charging station (CS) for electrical vehicle (EV). It interacts with the grid to compensate for the reactive power. The charging station operates in various modes (i) charging/discharging of EV battery, (ii) compensation of reactive power, (iii) both concurrent charging and compensation of harmonics current, and (iv) concurrent discharging and compensation of harmonics current. The CS while in grid connected mode, operates under distorted and unbalance grid voltages conditions. The control of charging station is designed such that reference grid currents synchronize with phase voltages at PCC (Point of Common Coupling). If grid losses synchronism, then charging station works in islanded mode and PV source charges the EV battery. The performance of charging station is tested under various dynamic conditions and grid currents distortion levels are in the limits as recommended by the standard IEEE-519.