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首页> 外文期刊>Power Electronics, IET >Modified space vector modulation for fault-tolerant operation of multilevel cascaded H-bridge inverters
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Modified space vector modulation for fault-tolerant operation of multilevel cascaded H-bridge inverters

机译:改进的空间矢量调制,用于多级级联H桥逆变器的容错操作

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摘要

In this study, fault-tolerant operation of multilevel cascaded H-bridge (CHB) inverters is presented and a novel switching strategy based on space vector modulation is proposed. A faulty power switch in high power converters can lead to expensive downtime, loss of productivity and increased costs. Various power switch faults and their influence on space vector diagram of CHB inverters are investigated. In the event of a fault, the output voltage of inverter is reduced and redundant switching states are used to generate balanced line-to-line voltages. By adding some devices to the basic structure, CHB inverter will operate with maximum achievable output voltage. Simulation and experimental results are shown for a five-level CHB inverter to validate the proposed modulation technique.
机译:本文研究了多级级联H桥逆变器的容错操作,提出了一种基于空间矢量调制的新型开关策略。大功率转换器中的电源开关故障会导致昂贵的停机时间,生产力损失和成本增加。研究了各种电源开关故障及其对CHB逆变器空间矢量图的影响。发生故障时,逆变器的输出电压会降低,冗余开关状态将用于生成平衡的线间电压。通过在基本结构中增加一些器件,CHB逆变器将以最大可实现的输出电压运行。给出了五电平CHB逆变器的仿真和实验结果,以验证所提出的调制技术。

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