一种基于单向电流H桥子模块及主动环流注入的MMC拓扑

This study proposed a novel modular multilevel converter (MMC) based on unidirectional current H-bridge submodule (UCH-SM) with active circulating current injection (ACCI). Under the premise of keeping the arm current unidirectional, the UCH-SM was developed by optimizing the full-bridge submodule (FBSM). Although the number of required switching devices of the UCH-SM-based MMC (UCH-MMC) is nearly...