Circulating Current Control Strategies in Modular Multilevel Converter with Reduced Number of Sensors Converter with Reduced Number of Sensors

Abstract

Multilevel converters are the preferred topologies in high voltage applications due to multiple voltage levels generated in the quantized line-to-line voltages and the fact that the power devices have to withstand only a fraction of the total voltage dc bus voltage. Amongst them, the modular multilevel converter (MMC) defines the state of the art in voltage source converters.