Modularity, efficiency, power quality, and high reliability are the attractive advantages of multilevel inverters (MLIs). But it has limitations in terms of an increased number of semiconductor devices as compared to conventional 2-level inverters. In this paper, a fault-tolerant single-phase 5-level MLI configuration is proposed. The proposed fault-tolerant configuration of the MLI can significantly improve its reliability while maintaining the modularity of its software implementation. Examination, design, and implementing thought for both normal and abnormal operating situations of the proposed MLI are presented in this paper. The feasibility of the proposed fault-tolerant MLI is verified by simulation in MATLAB/Simulink environment and experimental results in a laboratory prototype.

模块化，效率，电能质量和高可靠性是多电平逆变器（MLI）的诱人优势。但是，与常规的两电平逆变器相比，它在增加半导体器件数量方面具有局限性。本文提出了一种容错单相5级MLI配置。所提出的MLI的容错配置可以显着提高其可靠性，同时保持其软件实现的模块化。本文介绍了所提出的MLI的正常和异常运行情况的检查，设计和实施思路。通过在MATLAB / Simulink环境中进行仿真并在实验室原型中获得实验结果，验证了所提出的容错MLI的可行性。