GIS内の部分放電およびフリー異物により発生するラム波の時間周波数解析  [in Japanese] Time-Frequency Analysis of Lamb Waves Caused by Partial Discharges and Free Particles in GIS  [in Japanese]

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Author(s)

Abstract

We investigated propagation properties of Lamb waves in GIS tank using time-frequency analysis to diagnose insulation performance of GIS. We measured the acoustic signals excited by a metallic particle colliding with the tank sheath, and those emitted by partial discharge in GIS as well. The Wavelet Transform was applied to decompose the wave data into its timefrequency components. As the result, it was confirmed that Lamb waves with the dispersive property of the velocity are excited and the waves propagate spirally along the tank wall due to the cylindrical structure of the tank. Taking these results into consideration, we proposed a new technique for identification of the defect location in GIS based on the time-frequency analysis of the acoustic waves using the Wavelet Transform.

Journal

  • The Transactions of the Institute of Electrical Engineers of Japan. B A Publication of Power and Energy Society

    The Transactions of the Institute of Electrical Engineers of Japan. B A Publication of Power and Energy Society 122(6), 719-724, 2002-06-01

    社団法人電気学会

References:  10

Cited by:  13

Codes

  • NII Article ID (NAID)
    10008508667
  • NII NACSIS-CAT ID (NCID)
    AN10136334
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03854213
  • NDL Article ID
    6175514
  • NDL Source Classification
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL Call No.
    Z16-794
  • Data Source
    CJP  CJPref  NDL  IR 
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