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首页> 外文期刊>IEEE Transactions on Industrial Electronics >A Fault-Tolerant Multilevel Inverter Topology With Preserved Output Power and Voltage Levels Under Pre- and Postfault Operation
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A Fault-Tolerant Multilevel Inverter Topology With Preserved Output Power and Voltage Levels Under Pre- and Postfault Operation

机译:具有预保存的输出功率和电压电平的容错多级逆变器拓扑在预先和后退操作下

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摘要

Low reliability is one of the significant worries of a multilevel inverter (MLI) and which results due to the presence of a higher number of switches and capacitors as compared with the conventional two-level inverter. Consequently, the fault-tolerant (FT) operation of MLI has attracted significant research attention. Therefore, in this article, a nine-level inverter topology with FT characteristics is discussed. The proposed topology is capable of tolerating short-circuit and open-circuit faults not only in the single switch but also in multiple switches. It preserves output power, voltage levels, and capacitor voltage balancing under pre- and postfault operation. The proposed MLI topology requires the least number of dc sources, capacitors, switches, clamping diodes, and total blocking voltage in comparison to recently proposed topologies. Thus, offering better efficiency profile under pre- and postfault conditions. The proposed work has been validated experimentally with a laboratory prototype.
机译:低可靠性是多级逆变器(MLI)的重要担忧之一,并且与传统的双电平逆变器相比,由于存在较多数量的开关和电容器而导致的结果。因此,MLI的容错(FT)操作引起了显着的研究介绍。因此,在本文中,讨论了具有FT特性的九个级逆变器拓扑。所提出的拓扑能够容忍不仅在单个开关中的短路和开路故障,还能够在多个开关中容忍短路和开路故障。它可以在预先和后凹槽操作下保留输出功率,电压电平和电容电压平衡。与最近提出的拓扑相比,所提出的MLI拓扑结构需要最小的DC源,电容器,开关,夹紧二极管和总阻断电压。因此,在预后和后退条件下提供更好的效率简介。拟议的工作已经通过实验室原型进行了实验验证。

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