Fault detection for modular multilevel converters based on sliding mode observer

Shao, Shuai and Wheeler, Patrick and Clare, Jon C. and Watson, Alan James (2013) Fault detection for modular multilevel converters based on sliding mode observer. IEEE Transactions on Power Electronics, 28 (11). pp. 4867-4872. ISSN 0885-8993

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Abstract

This letter presents a fault detection method for modular multilevel converters (MMC) which is capable of lo¬cating a faulty semiconductor switching device in the circuit. The proposed fault detection method is based on a sliding mode observer (SMO) and a switching model of a half-bridge, the approach taken is to conjecture the location of fault, modify the SMO accordingly and then compare the observed and measured states to verify, or otherwise, the assumption. This technique requires no additional measurement elements and can easily be implemented in a DSP or micro-controller. The operation and robustness of the fault detection technique are confirmed by simulation results for the fault condition of a semiconductor switching device appearing as an open-circuit.

Item Type: Article
Additional Information: (c)2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works
Keywords: Fault detection, modular multilevel converter, sliding mode observer, switching model
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
Identification Number: 10.1109/TPEL.2013.2242093
Depositing User: Burns, Rebecca
Date Deposited: 05 Jul 2017 10:48
Last Modified: 13 Jul 2017 08:48
URI: http://eprints.nottingham.ac.uk/id/eprint/43946

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