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Title: The application of sliding mode observers to fault detection and isolation for multilevel converters
Author: Shao, Shuai
ISNI:       0000 0004 5358 6391
Awarding Body: University of Nottingham
Current Institution: University of Nottingham
Date of Award: 2015
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Multilevel converters have received significant interest recently as a result of their high power capability and good power quality. However due to the large number of sensitive components including power semiconductor devices and capacitors used in such circuits there is a high likelihood of component failures. This thesis considers one of the most promising multilevel topologies---the modular multilevel converter (MMC). Several methods are presented to detect and locate open-circuit faults in the power semiconductor devices in an MMC. These methods are based on sliding mode observers (SMOs). The signals used in the proposed methods are already available as measurement inputs to the control system and no additional measurement elements are required. An experimental MMC rig has been designed and built to validate these fault detection and isolation methods. The methods can be used with other multilevel converter topologies employing similar analysis and principles.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: TK7800 Electronics