双极性中压直流配电系统中之字形MMC的容错独立极控制方案

This article presents a fault-tolerant independent pole control scheme for a zigzag modular multilevel converter (MMC) targeting bipolar medium-voltage direct-current (MVDC) distribution systems. An MMC which adopts a zigzag transformer as an ac grid interface transformer, namely zigzag MMC, has inherent bipole operation capability with unbalanced loads of positive and negative poles on the dc sid...