Control of Two-Stage OFF-Board Electric Vehicle Charger

Due to the population rise of EV, numbers of off-board electric vehicle (EV) chargers are increasing in worldwide. The larger quantity of EV chargers connected to utility grid may affect the supply quality if operate by improper control. This paper shows a control development of two stage OFF board EV charger which can work in all possible active (P)-reactive (Q) power cases. The performance of controller is evaluated in eight modes including charging and reactive power compensation. The charger charges the battery pack as per desired by user and compensate the reactive power if requested by utility grid. The charger comprises of two bidirectional stages i.e. first (AC to DC) and second (DC to DC) conversion stages. A simulation based study has been presented of a 12.5 KVA EV charger using MATLAB/Simulink toolbox. Further, the claims are verified in real time using dSPACE 1104.