• DocumentCode
    272839
  • Title

    An analysis of AC conductivity in moist oil-impregnated insulation pressboard

  • Author

    Żukowski, Paweł ; Kołtunowicz, Tomasz N. ; Kierczyński, Konrad ; Subocz, Jan ; Szrot, Marek ; Gutten, Miroslav ; Sebok, Milan ; Jurcik, Jozef

  • Author_Institution
    Dept. of Electr. Devices & HV Technol., Lublin Univ. of Technol., Lublin, Poland
  • Volume
    22
  • Issue
    4
  • fYear
    2015
  • fDate
    Aug-15
  • Firstpage
    2156
  • Lastpage
    2164
  • Abstract
    The paper presents research results of testing AC conductivity in a moist oilimpregnated electric insulation pressboard, depending on the moisture content level and temperature of the samples. A new method has been elaborated for converting experimentally obtained dependences from frequency-domain spectroscopy (FDS) to the reference temperature of 293 K (20 /dpl deg/C). Activation energy values have been determined for the conduction and relaxation time. It has been found the conductivity is realized by electron tunnelling between potential well formed by water molecules contained in the structure of moist cellulose.
  • Keywords
    insulating oils; insulation; tunnelling; AC conductivity analysis; FDS; activation energy; conduction time; electron tunnelling; frequency-domain spectroscopy; moist cellulose structure; moist oil-impregnated electric insulation pressboard; relaxation time; Conductivity; Frequency measurement; Insulation; Moisture; Permittivity; Temperature dependence; Temperature measurement;
  • fLanguage
    English
  • Journal_Title
    Dielectrics and Electrical Insulation, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    1070-9878
  • Type

    jour

  • DOI
    10.1109/TDEI.2015.004606
  • Filename
    7179178
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=272839