A decision algorithm to select a proper control method for a cascaded multilevel inverter under faulty condition

Fault tolerant ability is one of the most important tasks in high power converters. In this paper, a comparison between conventional fault tolerant methods is done for four applicable methods. For this purpose, their performance is investigated in specific case study and simulation results are used to illustrate their advantages and disadvantages. The most important features taken into account are maximum available voltage, harmonic distortion of output voltage and input current, and magnitude of common mode voltage. Finally, a decision algorithm based on the results is suggested to select suitable method to control inverter under specific faulty condition.