An ANFIS Based Grid Connected Renewable Source Bidirectional SEPIC Converter Multifunctional EV Charger With Reduced Peak and Disturbances

Abstract

Integration of EV charging modules into the grid is increasing in present day as the utilization of EVs are on rise. At present technology most of the charging stations are unidirectional which only charge the EV battery. In future there might be a requirement of bidirectional converters which have the capability if G2V and V2G operations. In this paper a multifunctional EV charger with bidirectional SEPIC converter and full bridge converter is proposed. The bidirectional charger is included with PV array for renewable power sharing either to the EV battery or to the grid. The bidirectional SEPIC converter is controlled by a G2V/V2G controller with feedback from the DC link voltage and battery measurements. The full bridge converter control is included with SMC voltage regulator which controls current direction between the EV charger and grid. The conventional SMC is replaced with ANFIS current regulator trained using ‘back propagation’ optimization technique. With this updated to the full bridge controller the peak overshoots of the currents and disturbances during transitions are mitigated to a greater extent. Along with the reduced disturbances the PV array power extraction is also improved. A comparative analysis between the SMC and ANFIS regulator models is presented in this paper using MATLAB Simulink Electrical tools.