一种模块化多电平半桥储能变换器中开关常见电气故障的诊断策略

In this article, a novel diagnosis strategy including both open-circuit faults (OCFs) and short-circuit faults (SCF) is proposed for the switches in modular multilevel converter topology based on half-bridge energy storage submodules. The OCF diagnosis strategy is to analyze the current flow path of the open-circuit submodule in each OCF state, and then deduce the output voltage expression of the ...