Design and Implementation of Modified Z-Source Inverter for Multi-Port Electric Vehicle Charger

The charging infrastructure for Electric Vehicle (EV) has major demands in recent years. Considering Solar Photovoltaic (PV) as the input reduces dependency of Power Grid. This literature presents Modified Z-Source Inverter (MZSI) that provides boosted output to charge the battery through charging unit and supplying to grid. The dc-ac conversion stage is reduced from multi stage to single stage with the help of Z-Source Inverter (ZSI). In this article, three ports such as PV has input source, Grid and Battery charging unit are considered as output ports with MZSI as a converter. Multiple ports has been created by splitting the capacitors across switches in MZSI for connecting multiple battery charging unit. This topology operates in different modes such as PV to Grid, PV to Battery, Grid to battery and Battery to Grid. In this work, lithium ion battery is considered for the analysis purposes. The results and analysis carried out in MATLAB/Simulink and the results are obtained which shows that multiple vehicles can be charged with this topology.