Design, Implementation and Control of a Multicellular Power Converter

Abstract

The purpose of this master project is to build a multilevel power converter with four output voltage levels, known as three cells power converter. The converter is made based on commutation cells and floating capacitors and can be used as a chopper or a half-bridge inverter. To guarantee a good operation of the converter, a non-linear feedback is proposed based on exact input-output linearization. The controller ensures the stabilization of the voltage across floating capacitors around their references and the regulation of the output current. Experimental results show the efficiency of the experimental setup and its control scheme in two cases: DC/DC and DC/AC structures.