Abstract
The modular multilevel cascaded converter (MMCC) has been considered as a promising solution for integrating the utility-grade renewables to the medium-voltage (MV) power system. However, the implementation becomes difficult with the centralized control architecture as the cascaded numbers increase. This paper presents a distributed control technique for the cascaded converter, which significantly reduces the complexity and increases the flexibility to expand the system. Experimental results carried out on a 7-level star-connected cascaded converter are included to validate the proposed approach.