Design and Analysis of Vienna Rectifier considering System Parasitic for off-Board EV Charging

The need for higher power ratings and efficient AC-DC conversion led to opting of Vienna Rectifier for off-board electric vehicle (EV) charging applications. In this paper, a complete analysis of three phase Vienna Rectifier considering the effect of parasitic in the system for off-board EV charging application is discussed. To improve the dynamic response a modified dual loop control using d-axis and q-axis current controller including the effect of system parasitic in control loops is proposed. The proposed algorithm is compared with different control algorithms viz., dual loop control using hysteresis current controller and dual loop control using d-axis and q-axis current controller with SVPWM. A comparative performance analysis is discussed in terms of dynamic response during system disturbances like load variation, reference DC bus voltage variation and grid side variations. A 50 kW Vienna Rectifier operating at a switching frequency of 200 kHz is used for performance evaluation of all three control algorithms and is validated using MATLAB-Simulink.