Hybrid Energy Input Based EV Charging System with Multi -Mode Power Flow and Adaptive Optimal Power Management Scheme

In this paper, a renewable energy source (RES) rein-forced grid-integrated electric vehicle (EV) charging system with an adaptive optimal power management (AOPM) scheme has been proposed. The system offers multi-mode bidirectional power flow i.e. grid-to-vehicle (G2V), RES-to-grid (PV2G), renewable energy storage system (RESS)-to-grid (RESS2G), vehicle-to-vehicle (V2V) etc. with seamless transition. The AOPM scheme administrates all the operation depending upon the available source, load demand, couple, and decouple the sub-system to ensure no power wastage, maximum utilization of the RES, and reduced grid tariff thus optimizing the power utilization. The operation of the proposed scheme is divided into various modes and the scheme guarantees a seamless transit between these modes without disrupting the battery charging operation and power quality. Additionally, it automatically places the various source-side converters in standby mode, adapting to various worst-case scenarios effectively. An experimental prototype of a 10 kW peak has been developed to verify the proposed system with the AOPM scheme.