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Study by modeling and simulation of open-switch fault diagnosis for five-level converters

Abstract : In this paper, an open-switch fault diagnosis method for five-level H-Bridge Neutral Point Piloted (HB-NPP) or T-type converters is proposed. While fault tolerant operation is based on three steps (fault detection, fault localization and system reconfiguration), a fast fault diagnosis, including both fault detection and localization, is mandatory to make a suitable response to an open-circuit fault in one of the switches of the converter. Furthermore, fault diagnosis is necessary in embedded and safety critical applications, to prevent further damage and perform continuity of service.In this paper, we present an open-switch fault diagnosis method, based on the switches control orders and the observation of the converter output voltage level. In five-level converters such as HB-NPP and T-type topologies, some switches are mostly 'on' at the same time. Therefore, the fault localization is quite complicated. The fault diagnosis method we proposed is capable to detect and localize an open-switch fault in all cases. Computer simulations are carried out by using Matlab Simulink and SimPowerSystem toolbox to validate the proposed approach.
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https://hal.univ-lorraine.fr/hal-03225290
Contributor : Ehsan Jamshidpour <>
Submitted on : Wednesday, May 12, 2021 - 1:13:07 PM
Last modification on : Tuesday, May 25, 2021 - 5:43:30 PM

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Florent Becker, Ehsan Jamshidpour, Philippe Poure, Shahrokh Saadate. Study by modeling and simulation of open-switch fault diagnosis for five-level converters. Transactions on Environment and Electrical Engineering, Łososiowice: EEEIC International Publishing, 2016, 2 (1), ⟨10.22149/teee.v2i1.76⟩. ⟨hal-03225290⟩

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