Modular Multilevel Converter topologies with DC-Short circuit current limitation

Abstract

Demanding future applications in power transmission and drives like solar-thermic power plants and off-shore wind power require advanced converter systems. Modular Multilevel Converters are well adopted to these needs, owing to industrial scalability, high efficiency and fast dynamic controllability under transient and fault conditions including DC-Side faults. The respective features of the established concepts for the high power range (M2C) and of new concepts for the low power range (MHF) are explained.