This paper proposes a new fault-tolerant strategy to revamp performance of three phase multilevel converters with a single faulty switch. The proposed faulttolerant strategy is based on application of a modified Selective Harmonic Elimination (SHE) technique in conjunction with the Fundamental Phase-Shift Compensation (FPSC) method. The proposed faulttolerant strategy makes the most use of converter capacity in the faulty condition, generates balanced line voltages, and eliminates a wide range of lower order harmonics to limit the Total Harmonic Distribution (THD) of the converter voltages in the faulty condition. In this paper, first a brief background about Cascaded H-bridge (CHB) multilevel converters and SHE technique is provided. Then the proposed fault-tolerant strategy and the modified SHE technique are presented. Finally, several experimental results are provided to validate the operation of the proposed strategy. . His research interests include modeling, design and control of power electronic converters, electricdrive vehicles and solar energy systems.

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