An HVDC experimental platform with MMC and two-level VSC in the back-to-back configuration

In this paper we present the realisation of an HVDC experimental platform with modular multilevel converter and two-level voltage source converter. Local control strategies for both converters are outlined in detail. The experimental platform is configured in such a way that the power-flow is controlled by the modular multilevel converter, while the DC voltage is regulated by the two-level voltage source converter. Local control algorithms are implemented by using OPAL-RT and dSpace platforms for rapid control prototyping. Experimental verification is provided.