Branch energy balancing with a generalised control concept for modular multilevel topologies — Using the example of the modular multilevel converter

Abstract

In this paper, branch energy balancing as part of a generalised control concept for modular multilevel converter topologies is investigated. A way to derive an optimal branch energy balancing regarding current stress is introduced. Afterwards, this generalised approach is applied to the Modular Multilevel Converter as an example topology. The approach is tested via simulation and verified with a low-voltage test setup.