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Turbine generator synchronization - two case studies

This article presents two case studies of increased vibrations associated with load dispatch and removal from gas turbine-driven synchronous generators during electrical supply synchronization. The first case involves a classical uneven air gap fault due to a loose foot on the generator. Such faults...

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Main Authors: Leong, Mohd. Salman, Lim, Meng Hee, Guai, Yeu Kae
Format: Article
Published: Elsevier 2012
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/33917/
http://www.sandv.com/downloads/1205leon.pdf
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spelling my.utm.339172017-02-15T00:17:21Z http://eprints.utm.my/id/eprint/33917/ Turbine generator synchronization - two case studies Leong, Mohd. Salman Lim, Meng Hee Guai, Yeu Kae TJ Mechanical engineering and machinery This article presents two case studies of increased vibrations associated with load dispatch and removal from gas turbine-driven synchronous generators during electrical supply synchronization. The first case involves a classical uneven air gap fault due to a loose foot on the generator. Such faults are readily detected from the 2x line frequency associated with an electrical defect source. Another case involves unusually high transient vibrations during synchronization and not widely reported in the literature. Vibration levels increased during synchronization which, under full load conditions, remained high and resulted in a unit trip due to excessive vibration levels. At partial-load conditions, the high-transient vibrations dropped back down to pre-synchronization levels. Dominant vibration frequency was at lx synchronous frequency (and not the classical 2x line frequency). This fault was not due to the generators themselves but due to defects involving the synchronization process with likely out-of-phase synchronization. Elsevier 2012-05 Article PeerReviewed Leong, Mohd. Salman and Lim, Meng Hee and Guai, Yeu Kae (2012) Turbine generator synchronization - two case studies. Sound and Vibration, 46 (5). pp. 8-11. ISSN 1541-0161 http://www.sandv.com/downloads/1205leon.pdf
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Leong, Mohd. Salman
Lim, Meng Hee
Guai, Yeu Kae
Turbine generator synchronization - two case studies
description This article presents two case studies of increased vibrations associated with load dispatch and removal from gas turbine-driven synchronous generators during electrical supply synchronization. The first case involves a classical uneven air gap fault due to a loose foot on the generator. Such faults are readily detected from the 2x line frequency associated with an electrical defect source. Another case involves unusually high transient vibrations during synchronization and not widely reported in the literature. Vibration levels increased during synchronization which, under full load conditions, remained high and resulted in a unit trip due to excessive vibration levels. At partial-load conditions, the high-transient vibrations dropped back down to pre-synchronization levels. Dominant vibration frequency was at lx synchronous frequency (and not the classical 2x line frequency). This fault was not due to the generators themselves but due to defects involving the synchronization process with likely out-of-phase synchronization.
format Article
author Leong, Mohd. Salman
Lim, Meng Hee
Guai, Yeu Kae
author_facet Leong, Mohd. Salman
Lim, Meng Hee
Guai, Yeu Kae
author_sort Leong, Mohd. Salman
title Turbine generator synchronization - two case studies
title_short Turbine generator synchronization - two case studies
title_full Turbine generator synchronization - two case studies
title_fullStr Turbine generator synchronization - two case studies
title_full_unstemmed Turbine generator synchronization - two case studies
title_sort turbine generator synchronization - two case studies
publisher Elsevier
publishDate 2012
url http://eprints.utm.my/id/eprint/33917/
http://www.sandv.com/downloads/1205leon.pdf
_version_ 1643649468870950912
score 13.211869

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