Single Phase Fast EV Charger Based on Grid Connected Quasi Z-Source Inverter

Fast charging of electric vehicles (EVs) is crucial for the widespread adoption of EV technology and the shift to sustainable transportation. Integrating renewable sources with EV charging systems is also essential to promote sustainable energy practices and reduce carbon emissions within the transportation sector. This paper introduces a new approach by integrating energy storage (ES)-based quasi-Z-source inverter (q-ZSI) into an on-grid solar system for a single-phase EV charging application. This innovative all-in-one system provides a fast-charging solution that integrates PV, ES, EV and grid. Besides the fast charging of EVs, the q-ZSI integration system offers the advantages of q-ZSI converters, featuring a single-stage structure for voltage boost or buck capabilities. This reduces component count and system cost and improves reliability while eliminating the need for additional filtering capacitors and reducing switching ripples. The theoretical analysis and simulation results have confirmed the effectiveness of the proposed system.