Design And Control Of A Hybrid Multilevel Converter With Floating Dc-Links To Improve The Outputs

Abstract

This paper proposes the design and control of a hybrid multilevel converter with floating DC-links to improve the outputs. An hybrid multilevel inverter designed by the series combination of a main three-level NPC converter and auxiliary floating H-Bridges (NPC-HBs) has been presented in. In this inverter, the NPC is used to supply the active power and the HBs is used as a series active filters,improving the voltage waveform quality by only handling reactive power. In this way the hybrid inverter reduces the need of bulky and expensive LCL passive filters and making it an attractive alternative for large power applications. Validations of results are provided in matlab simulink.