Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Analysis on Characteristics of Core and Winding Vibration in Cast Resin Transformer

몰드변압기 철심과 권선 진동 특성분석

  • 김종민 (한국전기안전공사 전기안전연구원 진단기술연구팀) ;
  • 최명일 (한국전기안전공사 전기안전연구원 진단기술연구팀) ;
  • 김영석 (한국전기안전공사 전기안전연구원 진단기술연구팀) ;
  • 방선배 (한국전기안전공사 전기안전연구원 진단기술연구팀) ;
  • 송길목 (한국전기안전공사 전기안전연구원 진단기술연구팀)
  • Received : 2012.07.11
  • Accepted : 2012.09.11
  • Published : 2012.10.30
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Abstract

In this paper, The cast resin transformer's vibration is measured using noncontact raser vibrometer(LV110D). The vibration characteristics of transformer windings and core are analyzed for relation between vibration magnitude and cause. Using the analysis results, the technique is presented to diagnose cast resin transformer. which is able to diagnose transformer' deformation in winding and core geometry. The magnetostriction and electromagnetic force act on the core and windings, causing them to vibrate. The vibration from windings and core penetrates into transformer cast resin and reaches the outside walls. The fundamental frequency of the core and windings vibration signal is twice that of the power frequency(120Hz). The results show that the magnitude of core vibration is linear to driving voltage amplitude and magnitude of windings vibration is increased to loading current under the some level and then stabilized.

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References

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