A Review on Multilevel Converters Topologies with Multicell Structures

This paper presents an overview and analysis of multilevel converters topology and control strategy on the basis ofharmonic distortion and efficiency provided by the converters. Reducing the harmonic distortion at differentoperation conditions while maintaining efficiency and controllability is animportant need and still a considerable challenging task for designers. The existing methods are studied and compared on the basis of topological complexity, operational limitations, and controllability. Finally a converter configuration on the basis of these study is proposed for future research and development.