DocumentCode :
1148790
Title :
Fault Detection on Multicell Converter Based on Output Voltage Frequency Analysis
Author :
Lezana, Pablo ; Aguilera, Ricardo ; Rodríguez, José
Author_Institution :
Dept. de Electr., Univ. Tec. Federico Santa Maria, Valparaiso
Volume :
56
Issue :
6
fYear :
2009
fDate :
6/1/2009 12:00:00 AM
Firstpage :
2275
Lastpage :
2283
Abstract :
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.
Keywords :
fault diagnosis; harmonic analysis; power conversion harmonics; voltage measurement; faulty cell detection; high-frequency harmonic analysis; multicell converter; voltage frequency analysis; voltage measurement; Digital control; fault diagnosis; multilevel systems; power electronics;
fLanguage :
English
Journal_Title :
Industrial Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0046
Type :
jour
DOI :
10.1109/TIE.2009.2013845
Filename :
4776498
Link To Document :
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