Reconfiguration of Carrier-Based Modulation Strategy for Fault Tolerant Multilevel Inverters
Reconfiguration of Carrier-Based Modulation Strategy for Fault Tolerant Multilevel Inverters
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DOI：
10.1109/tpel.2007.904249
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发表时间：
2007-09
影响因子：
6.7
通讯作者：
Lei Hu;Mingyao Ma;Alian Chen;Xiangning He;Hao Ma
中科院分区：
文献类型：
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作者：
Lei Hu;Mingyao Ma;Alian Chen;Xiangning He;Hao Ma
本文重点研究具有冗余开关状态的多电平逆变器的容错潜力，例如级联多电平逆变器和电容器自电压平衡逆变器。根据输出电压电平与开关状态之间的关系，多电平逆变器的故障情况分为两类。当部分功率器件发生故障时，可以根据故障模式重新配置门信号。本文讨论了相位配置PWM策略（PDPWM）和相移PWM策略（PSPWM）的重构方法，并且可以很容易地扩展到其他基于载波的PWM策略。当设备发生故障时，采用所提出的方法可以实现线间电压平衡。此外，电路结构可以与一般电路结构相同，并且器件的电压应力不会增加。论文中包含仿真和实验结果来验证所提出的方法。
This paper focuses on the fault-tolerance potential of multilevel inverters with redundant switching states such as the cascaded multilevel inverters and capacitor self-voltage balancing inverters. The failure situations of the multilevel inverters are classified into two types according to the relationship between output voltage levels and switching states. The gate signals can be reconfigured according to the failure modes when some of the power devices fail. The reconfiguration method is discussed for phase disposition PWM strategy (PDPWM) and phase shifted PWM strategy (PSPWM) in the paper and it can be extended for other carrier-based PWM strategies easily. Balanced line-to-line voltage will be achieved with the proposed method when device failure occurs. Furthermore, the circuit structures can be the same as the general ones and the voltage stress of the devices does not increase. Simulation and experimental results are included in the paper to verify the proposed method.