An Asymmetric Modular Multilevel Converter of 27 Levels

This paper presents a novel approach to implement a Modular Multilevel Converter based on asymmetric modules. The presented Asymmetric Modular Multilevel Converter is able to generate up to 27 level with 3 modules per arm thanks to the ratio 9:3:1 among the power cells. The balance control of the capacitors of the topology is made using the redundant states of the topology. The feasibility of the proposal is validated with computational simulations in the time and frequency domains of a single phase converter.