Keywords
cross-linked polyethylene
water micro-inclusions
water tree
mathematical modeling
electrical current
stressed volume
How to Cite
Abstract
The mathematical modeling and analysis of a water tree development processes between water micro-inclusions in cross-linked polyethylene (XLPE) insulation of extra high voltage cables and its effect on the electric field disturbances in the dielectric were done. The inclusions, connected by tree with variable cross-section of the so-called "string of pearls" configuration were discovered. A comparative analysis of inhomogeneous distribution of electric field, stressed volumes, currents density and electromechanical forces in insolation depending on the number of conductive tree branches was performed. The areas of the greatest field disturbances, caused by those micro-defects in the dielectric, which contribute degradation processes and reduce a resource of XLPE material were determined. References 14, figures 3.
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