模块化多电平变换器不同模式下子模块IGBT开路故障的监测与确认方法

This paper proposes an effective detection method for insulated gate bipolar transistor (IGBT) open-circuit faults in multiple modular multilevel converters (MMCs) working in inverter and rectifier modes. This fault detection uses segmental structure and is composed of the fault monitoring and fault confirmation. The two functional parts can significantly relieve the calculation burden by shrinking the fault scope and precisely detect the faulty arm without being influenced by the operation disturbance and fault scenarios.