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

Ronaldo Antonio Guisso¹; Mário Lúcio da Silva Martins¹; Hélio Leães Hey¹; Tadeu Vargas¹

¹ Universidade Federal de Santa Maria

Baixar PDF doi:10.20906/CPS/CBA2018-0081

Resumo

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 with a few dozens of kilo-watts or more. 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.

Palavras-chave: Cascaded; LCL filter; Quasi-Z Source inverter