Comparative study of capacitor-assisted extended boost qZSIs operating in continuous conduction mode

The quasi-Z-source inverter is a very attractive topology because of its unique capability of voltage boost and buck functions in a single stage. But its voltage boost property could be a limiting feature in some applications where very high input voltage gain is required. The input voltage gain could be extended by the implementation of the cascaded quasi-impedance network. This paper discusses two novel extended boost quasi-Z-source inverters. Steady state analysis of topologies operating in continuous conduction mode is presented. Performances of topologies were compared and experimentally validated.