An Efficient On‐Board Charging System for Light EVs Using High Gain SCBZ Converter With G2V and V2G Capabilities

ABSTRACT This study proposes a novel architecture for an on‐board charging (OBC) system that integrates dual energy sources, viz., single‐phase AC grid and solar PV. The system employs a switched‐capacitor bidirectional zeta (SCBZ) converter topology to facilitate both grid‐to‐vehicle (G2V) and vehicle‐to‐grid (V2G) functionalities. An H‐bridge type active front‐end converter (AFC) is used to convert AC to DC. An improved mixed second‐order–third‐order generalized integrator (IMSTOGI) control algorithm is developed to ensure robust operation of AFC under grid disturbance. The AFC ensures that the total harmonic distortion (THD) of the supply current stays within the limit specified by international standards and unity power factor (UPF) operation. The SCBZ converter manages both the charging and discharging processes for LEVs, with an emphasis on enhanced efficiency, low conduction losses, reduced component count, and high gain. The designed system has soft‐starting features of BLDC drive in propulsion mode without using any current and voltage sensor at motor side. The performance of the system is tested by using the MATLAB simulation and validated by Opal‐RT prototype; the results prove the improved performance of the advanced charging methodology by the proposed SCBZ converter.