A geometric approach to nonlinear fault detection and isolation in a hybrid three-cell converter

S. Khelouat, T. M. Laleg-Kirati, A. Benalia, D. Boukhetala and M. Djemai

International Journal of Systems Science, 2019, vol. 50, issue 5, 1069-1088

Abstract: In this paper, the problem of fault detection and isolation in a three-cell converter is investigated using a nonlinear geometric approach. This powerful method based on the unobservability distribution is used to detect and isolate the faulty cell in the three-cell converter. First, a model describing the faults in the cells is presented. The geometric approach is then applied on this faulty model to generate residual signals based on a sliding-mode observer that allows the detection of faults in the three-cell converter. Numerical results show the effectiveness of the proposed sliding-mode residual generators for fault detection and isolation in the three-cell converter.

Date: 2019
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DOI: 10.1080/00207721.2019.1588409

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