Paralleling Operation of 10 kV SiC MOSFET-Based Modular Multi-Level Converters (MMCs) for Scalable Asynchronous Microgrid Power Conditioning System

An asynchronous microgrid (ASMG) with silicon carbide (SiC) MOSFET-based power conditioning system (PCS) is an attractive option for future microgrids, which can potentially improve microgrid dynamic performance and grid power quality. To support future microgrids’ needs for higher power, scaling PCS power via paralleling multiple modules or converters is a potential solution. In this paper, a strategy for scalable ASMG PCS operation is proposed. MMC-based PCSs are implemented to demonstrate the proposed strategy, including MMC paralleling operation analysis and corresponding control functions. Experimental results are provided to demonstrate the scalable PCS operation at 25 kV rated voltage.