Fault detection on multicell converter based on output voltage frequency analysis

Title: Fault detection on multicell converter based on output voltage frequency analysis
Creator: Lezana, Pablo; Aguilera, Ricardo; Rodríguez, José
Relation: IEEE Transactions on Industrial Electronics Vol. 56, Issue 6, p. 2275-2283
Publisher Link: http://dx.doi.org/10.1109/TIE.2009.2013845
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Resource Type: journal article
Date: 2009
Description: Multilevel converters use a large amount of semiconductors, allowing the reconfigurate of the converter to work even on internal fault condition. This paper presents a method to detect faulty cells in a cascaded multicell converter requiring just one voltage measurement per output phase. The method is based on high-frequency harmonic analysis, using a dynamic prediction of their behavior, avoiding erroneous detection on transients while keeping the precision under real fault events. Once the faulty cell is detected, it can be bypassed allowing the converter to keep working according to previously reported techniques. Experimental results confirm accurate and fast fault detection, with a good rejection to normal operation transients.
Subject: digital control; fault diagnosis; multilevel systems; power electronics
Identifier: http://hdl.handle.net/1959.13/916225
Identifier: uon:7935
Identifier: ISSN:0278-0046
Language: eng
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