The redundancy in switching states to generate different voltage levels is of great importance to incorporate fault-tolerant features in multilevel inverters. However, this redundancy comes at the expense of high device count, which is paralleled with vulnerable characteristics of semiconductor devices, resulting in low reliability. About this concern, the present study introduces a novel fault-tolerant topology to generate the five-level output voltage. The proposed topology can tolerate open-circuit failure, for single and multiple switches with the help of novel redundant leg architecture and short-circuit condition is dealt with the fast fuses. The comparative study with recent literature is discussed, which reveals the superiority of the proposed topology, in terms of qualitative as well as quantitative parameters. Switching strategies are proposed under different single and multiple switch fault cases, which achieves self-balancing of capacitor voltage. Thus, no complex control scheme is required. The simulation is performed in MATLAB/Simulink, and the feasibility of the proposed topology is validated using experimental results.

中文翻译：

---

混合五电平逆变器拓扑中的单开关和多开关容错功能

开关状态中产生不同电压电平的冗余对于将容错功能纳入多电平逆变器非常重要。然而，这种冗余是以高设备数量为代价的，这与半导体设备的易受攻击的特性平行，导致可靠性低。关于此问题，本研究介绍了一种新颖的容错拓扑以生成五电平输出电压。所提出的拓扑可以容忍开路故障，借助新颖的冗余支路架构，可以对单个和多个开关进行开路，并且通过快速熔断器解决短路情况。讨论了与最新文献的比较研究，从定性和定量参数方面揭示了所提出拓扑的优越性。提出了在不同的单次和多次切换故障情况下的切换策略，从而实现了电容器电压的自平衡。因此，不需要复杂的控制方案。在MATLAB / Simulink中进行了仿真，并使用实验结果验证了所提出拓扑的可行性。