Abstract
In this paper, we present a multicell converter connected to a load R-L. We show its importance in the practical implementation of a sliding mode control algorithm. The validity of the controller is shown with simulation results. In the second part a topology with fault tolerant control of multicell converters is proposed. This topology is developed through analysis of different power device's failure modes. Our objective is to present a methodology for the diagnosis of the faults in cells by using an sliding mode observer. The generation of residue is used to know the indicators of the faults. Simulation results are presented in order to illustrate the performance of the proposed approach.
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