SINGLE-DC-SOURCE QUASI-Z-SOURCE CASCADED MULTILEVEL INVERTER WITH ACTIVE POWER SHARING

Abstract

This paper proposes a novel cascaded multilevel topology, named Single-dc-Source quasi-Z Source Cascade Multilevel Inverter. This inverter has the ability to provide independent regulation of the dc bus voltage of each H-bridge, ensuring real power balancing and true symmetric to the multilevel waveforms. In addition, the Single-dc-Source quasi-Z Source Cascade Multilevel Inverter allows operating with a single low power PV array. This paper provides a detailed analysis of operation with a design methodology for the hardware, as well as modeling and controller design. Simulation results are provided to verify the proposed system operation and control strategy.