结合零序电压注入的模块化多电平变换器容错策略

This article proposes a novel fault-tolerant strategy for the operation of modular multilevel converters after submodule (SM) faults, which combines dc injection, neutral shift (NS), and balanced zero-sequence voltage injection (BZVI). A new method to calculate the injected zero-sequence voltage is proposed, which greatly simplifies the calculation of the dc injection and enables the combination o...