NDLI: A review of electrical winding failures in wind turbine generators

Content Provider	IEEE Xplore Digital Library
Author	Alewine, K. Chen, W.
Copyright Year	2011
Description	Author affiliation: TECO Westinghouse Motor Company, 5100 North IH35, Round Rock, TX 78681, USA (Chen, W.) \|\| Shermco Industries, 2425 East Pioneer Drive, Irving, TX 75061, USA (Alewine, K.)
Abstract	A quantitative review of the failure modes of over 1200 wind turbine generators repaired or replaced since 2005 has uncovered that fewer that half of the failures were electrical in nature and most of those were due to mechanical failures of the insulation support structure. In this paper, we will discuss briefly the overall failures and, in more depth, the nature of the electrical failures. Many of the failures appear to be of a serial nature due to inadequate original design of the machine and/or the insulation system. Some possible suggestions will be offered regarding repairs after catastrophic failure to help insure that the same type of failure will be less likely to repeat during the projected life of the turbine. These generators are exposed, at least in some part, to the typical voltage irregularities and mechanical stresses of any machine that operates 100 meters in the atmosphere in a wide variety of weathers. However, they are also sometimes affected by poor power quality from the IGBT based convertors used in most turbines. These failures could result from voltage stresses created by the convertor in the turbine or from neighboring turbines or, as has been suggested, even from neighboring wind parks. Defining actual root causes is therefore very difficult, but the immediate causes within the generator will be reviewed. Statistical information from other industries will also be used as a comparison to the relatively short experience of wind energy equipment. Where proper maintenance and mechanical analytical predictive techniques can drive major improvements in the mechanical life of the generators, the electrical failures are more difficult to identify before failure.
Starting Page	392
Ending Page	397
File Size	713979
Page Count	6
File Format	PDF
ISBN	9781457702785
e-ISBN	9781457702792
e-ISBN	9781457702778
DOI	10.1109/EIC.2011.5996185
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Generators Wind turbines Rotors Maintenance engineering Materials Insulation Industries failures wind turbines generators
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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