Analysis and Control of Switched Quasi-Impedance-Source-Inverter with Superior Boosting Ability for Renewable Energy Applications

In this project, a new coupled inductor-based switched quasi-ZSI is proposed to accomplish enhanced boost inversion at a high modulation index. It offers a robust boosting feature even with a very low turn’s ratio, which significantly reduces the passive circuit element’s size. The working principle, steady-state analysis, and the design guidelines for selecting circuit parameters are addressed. The proposed inverter significantly improves the input current ripple with enhanced boosting with appropriate control of the impedance-network active switch. A comprehensive comparative analysis with allied topologies is presented to show the proposed inverter’s effectiveness. The superior features offered are more suitable for renewable energy generation from low- and variable-voltage renewable sources, such as solar PV and fuel cells. The simulation results can be evaluated by using Matlab/Simulink Software.

Keywords: Enhanced boost, quasi-impedance-source inverter, renewable energy generation, shoot-through (ST), single stage, switched Z-network.