具有三有源开关对称半桥子模块及并联连接的模块化多电平变换器

Modular multilevel converters (MMCs) enjoy growing popularity primarily due to modularity and scalability, but their applications are still constrained by the complexity of hardware and control. MMCs with symmetrical-half-bridge (SHB) submodules can achieve bipolar operation via the simplest structure and reduced cost. However, the imbalance of submodule capacitor voltages remains as a challenge. ...