Influence of Electrode Material on Space Charge Development in XLPE Plates at HVDC

Authors

  • Carl-Olof Olsson ABB AB Coprorate Research Västerås
  • Maria Lundmark ABB AB Coprorate Research Västerås

DOI:

https://doi.org/10.5324/nordis.v0i24.2276

Keywords:

HVDC, PEA, XLPE

Abstract

The PEA method has been used to study the evolution
of electrode interface charge and space charge in 2 mm
thick XLPE samples at ±40 kV and room temperature.
The voltage polarity is switched and the transition to a
steady-state at each polarity is followed. The samples
are intended to be symmetric except for the electrical
boundary conditions, however the measured space
charge distribution is more or less unsymmetrical for all
cases studied. Gold leaf, aluminium foil and graphite
paint have been used as electrode materials, and the
obtained results are different for the three electrode
materials. Measurements with gold electrodes on three
samples having different storage conditions prior to the
measurements also provided significant differences
between the samples.

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Published

2017-09-04

Issue

No. 24 (2015): Proceedings of the 24th Nordic Insulation Symposium

Section

Articles

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