Influence of Electrode Material on Space Charge Development in XLPE Plates at HVDC
DOI :
https://doi.org/10.5324/nordis.v0i24.2276Mots-clés :
HVDC, PEA, XLPERésumé
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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