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Vibration analysis of a fast response brushless excitation system
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2019 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The aim of this study is to measure and analyze vibrations on a fast response brushless exciter (FRBE) at a real hydropower plant and identify vibration origins through frequency analysis. Moreover, the observed vibrations are evaluated in relation to generator vibration standards and estimated tangential eigenfrequencies of the studied FRBE.

It is concluded that the pulsations in the air gap torque, originating from the rotating thyristor bridge rectifier, is the source of the strongest vibrations. Some additional vibration sources are also identified. The requirements of the generator vibration standards are mostly fulfilled and no tangential eigenfrequencies are triggered in the vibration recordings. For further studies it is recommended that alternative control strategies and optimization of the FRBE mechanical design, with respect to its ability to withstand vibrations, should be investigated.

Place, publisher, year, edition, pages
2019. , p. 44
Series
UPTEC STS, ISSN 1650-8319 ; 19045
Keywords [en]
vibrations, frequency analysis, FRBE, controlled rectification, hydropower, exciter, generator, fast response
National Category
Mechanical Engineering Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:uu:diva-394098OAI: oai:DiVA.org:uu-394098DiVA, id: diva2:1357041
External cooperation
Voith Hydro
Educational program
Systems in Technology and Society Programme
Supervisors
Examiners
Available from: 2019-10-03 Created: 2019-10-02 Last updated: 2019-10-03Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • vancouver
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More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
  • html
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