On-Line Cable Diagnostic Possibilities in an Artificial Aging Environment

Authors

  • C. Freitag Author
  • C. Weindl Author
  • I. Mladenovic Author

DOI:

https://doi.org/10.24084/repqj09.658

Abstract

Since  more  than  a  decade  the  development  of reliable  and  accurate  diagnostic  tools  for  power  cables  is  in  the centre  of  interest  of  scientists  and  power  utilities.  With  the  de-velopments  in  our  power  systems,  like  the  increasing  feed-in  of renewable  energy  sources,  several  issues  could  be  additionally generated, such as extreme concurrence factors, short- and long-duration  variations,  voltage  imbalances,  waveform  distortions, voltage   fluctuations   and   power   frequency   variations.   These impacts affect the aging rapidity of the electrical equipment and finally  of  the  entire  the  electrical  distribution  network.  Using appropriate  diagnostic  methods,  it  is  possible  to  determine  the electrical equipment’s condition. The significance of the results depends  on  the  quality  of  the  measurement  system  and  of  the data  interpretation.  Based  on  these  results,  a  reliable  mainte-nance and investment strategy could be made, and the reliability of  the  grid  could  be  improved.  With  this  goal,  an  accelerated aging project for MV PILC (paper insulated lead covered) cables was  started.  A  specially  designed  aging  system  for  the  acceler-ated  aging  of  MV  cables  has  been  developed  to  point  out  the most  relevant  aging  parameters,  their  limits,  their  development and to upgrade the accuracy of the MV cable diagnostics in this way. In this paper, the diagnostic possibilities, mainly the dielec-tric  loss  factor  measurement  and its  dependence  on  environ-mental influences are presented.

Author Biographies

  • C. Freitag

    Institute for Electrical Power Systems

    University of Erlangen-Nuremberg

    Cauerstr. 4 – Haus 1, 91058 Erlangen

    Phone/Fax number: +49 9131 85 29 511, e-mail: freitag@eev.eei.uni-erlangen.de

  • C. Weindl

    Institute for Electrical Power Systems

    University of Erlangen-Nuremberg

    Cauerstr. 4 – Haus 1, 91058 Erlangen

    Phone/Fax number: +49 9131 85 29 511

  • I. Mladenovic

    Institute for Electrical Power Systems

    University of Erlangen-Nuremberg

    Cauerstr. 4 – Haus 1, 91058 Erlangen

    Phone/Fax number: +49 9131 85 29 511

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Published

2024-01-17

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Articles