Keywords
water micro-inclusions
dielectric
cross-linked polyethylene
mathematical modeling
forces
pressures
currents
How to Cite
Abstract
The mathematical modeling and the analysis of distribution of electric field, currents, forces and pressures in a solid dielectric (cross-linked polyethylene insulation) are performed for appearing of different-size closely located current-conducting (in particular water) micro-inclusions. The regularities of the field amplification, increasing of the current density and the resulting electromechanical forces and pressures, caused by changes in surface charges at closely located poles of micro-inclusions, have been studied. The dependences of these values on the configuration of micro-inclusions, in particular on their mutual distances, are determined. It is shown that the resultant forces contribute to attracting of small water inclusions to large ones and create conditions for the appearance and development of water trees in solid insulation. References 8, figures 4.
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