HIL simulation approach for a multicellular converter controlled by sliding mode

Abstract

Introduced more than ten years ago, the multicell converters make it possible to distribute the voltage constraints among series-connected switches and to improve the output wave-forms. This structure is used generally for high power application, that's why, some safety measures must be taken before the experimental tests. For these reasons, we can use HIL simulation. This paper presents some solutions for the active control of the voltages across the flying capacitors in the presence of variation of the input voltage. The last part of this paper has the aim to present a proposed sliding mode control for the studied converter. The goal of this study is to give it more robustness against some parameters variations. The proposed control approach is validated with success by HIL simulation approach.