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Failure behaviour of power converters in wind turbines

Ausfallverhalten von Frequenzumrichtern in Windenergieanlagen
 
: Pelka, Karoline; Fischer, Katharina

:
Volltext urn:nbn:de:0011-n-4732422 (382 KByte PDF)
MD5 Fingerprint: aff2c42a87d85b48812eb72f2b852ec5
Erstellt am: 10.11.2017


Deutsches Windenergie-Institut -DEWI-, Wilhelmshaven:
DEWEK 2017, 13th German Wind Energy Conference. Proceedings : 17 / 18 October 2017, Bremen, Germany
Bremen, 2017
4 S.
German Wind Energy Conference (DEWEK) <13, 2017, Bremen>
Englisch
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IWES ()
wind turbine; power converter; reliability; failure

Abstract
Frequent failures of power converters in wind turbines lead to turbine downtimes and cause considerable maintenance cost. In order to increase the power-converter reliability, the understanding of failure causes and mechanisms has to be enhanced. This paper presents results of a statistical analysis of comprehensive field-failure data based on a dataset covering more than 2900 wind turbines. The analysis aims at comparing the converter reliability of turbines with different generator-converter concepts and at determining the temporal failure behaviour of the converter core component phase module. The converter reliability in turbines with electrically-excited synchronous generator is found to be higher than in turbines with doubly-fed induction generator or squirrel-cage induction genera tor. The results indicate an early-failure behaviour of the phase-module component.

: http://publica.fraunhofer.de/dokumente/N-473242.html