Hybrid MMC based multi-terminal DC/DC converter with minimized FBSMs ratio considering DC fault isolation

An isolated high-power multi-terminal DC/DC converter is studied in this paper, based on hybrid modular multilevel converter configuration consisting of full-bridge submodules (FBSMs) and half-bridge submodules. To decrease the investment and power losses, a reduced arm FBSMs ratio (<;0.5) scheme is adopted. A detailed analysis on the relationship of the DC/DC converter inner AC voltage and the ar...