A New Control Strategy for Plug-in Electric Vehicle of DC Microgrid with PV and Wind Power Integration

This paper presents a plug-in electric vehicle (PEV) charging unit supplied by PV, wind and the battery in an autonomous mode of DC microgrid (MG) system. With the traditional control methods of PEV, the EV is charged without considering generation and the load limits. The control strategy proposed for PEV in this article is to increase the maximum rate of charging capacity of an EV only if generation exceeds the load demand using new current-loop control technique. The variation of photovoltaic irradiance, DC and AC loads, battery charging and discharging characteristics are considered which are directly coupled to a medium voltage DC bus. This tends to be an attractive option for increasing the efficiency and operation of electric vehicle charging station. The power reference based droop controller is designed for the battery to provide an efficient power management of a DC MG system by regulating the DC link voltage with less deviation. The effectiveness of the proposed MG system with Escape Ford EV vehicle has been validated by MATLAB/Simulink. The reported simulation results show that the approach presented is capable of governing the PEV charging unit and regulation of DC bus voltage.