具有直流故障阻断能力的增强型模块化多电平变换器

The large energy-storage requirement and lack of dc fault-tolerant capability are the major drawbacks of modular multilevel converters (MMC). To address these issues, alternate hybrid topologies have been developed, but these are all non-modular, and hence, MMC remains the most preferred topology for high-power applications. In this article, a new submodule (SM) structure is proposed that consists...