Multi-Pulse Converter based Rectification Scheme for Improving Power-Quality of EVs Charging Station

This paper proposes an off-board charging topology for electric vehicles (EVs). The proposed topology employs the concept of multi-pulse converters (MPC) for charging EV and improving the power quality of line current drawn. Specifically, the proposed topology works on grid frequency and omits the use of high frequency switches, thus improving the efficiency and minimizing the complexity of overall charging system. Explanation on the cancellation of low order harmonics in input line current by the utilization of phase shifting transformer is presented. Moreover, it is shown that the proposed topology meets the IEEE-519 power quality standards. The EV charging topology is modeled in MATLAB
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/Simulink environment to evaluate the power quality indexes in terms of total harmonic distortion (THD) in input line current and power factor (PF).