Dual-Input Nonisolated DC–DC Converter With Vehicle-to-Grid Feature
Gangavarapu Guru Kumar, Kumaravel Sundaramoorthy
Abstract
Electric vehicles (EVs) have become a more prominent solution to replace all fossil-fuel-based combustion vehicles. During the parking of EVs, the power produced by solar photovoltaic (PV) present in the PV-powered EVs is underutilized when the capacity of the EV battery is full. Also, a converter is devoted in the conventional EVs to perform the vehicle-to-grid (V2G) or vehicle-to-vehicle (V2V) operation. To use PV and to perform V2G operation, a novel nonisolated dual-input single-output dc–dc converter (DISOC) is proposed. The DISOC structure can be reconfigured to perform six types of operation based on the status of power availability with PV, battery, and also the running status of the EV. Simultaneous power transfer from both the input sources, charging the battery from solar PV, and V2G and G2V operations are the key features of the proposed converter. The converter operation, component design, effect of parasitic elements on the converter performance, small-signal model, and so on have been reported. The hardware prototype of the converter is fabricated for 500 W, and the experimental results are presented.