DOI: https://doi.org/10.15407/techned2016.05.005

COUPLED ELECTRICAL AND MECHANICAL PROCESSES IN POLYETHYLENE INSULATION WITH WATER TREE HAVING BRANCHES OF COMPLEX STRUCTURE

Author
I.M.Kucheriava
Institute of Electrodynamics National Academy of Science of Ukraine, pr. Peremohy, 56, Kyiv-57, 03680, Ukraine,
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Abstract

The distributions of electric field, electric force and mechanical stress in the polyethylene insulation of power cable that contains separate branch of a water tree are studied by computer modeling. Two models of water tree branch which include a string of water-filled spherical microcavities connected by cylindrical channels with equal radius and with radius decreasing along the length of the branch are examined. It is shown that the action of electric force and electromechanical stresses at the ends of thinner tree channels can cause their destruction and then growth of water trees in polyethylene insulation. References 15, figures 5, table 1.

Key words: polyethylene insulation, micro-sized water-filled cavities and channels, electric field, mechanical stress, computer modeling.

Received:    16.02.2016
Accepted:    29.02.2016
Published:  13.09.2016

References

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