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The National Academy of Sciences of Ukraine

The Institute of Electrodynamics

About Institute



M.A. Shcherba
Institute of Electrodynamics of the National Academy of Sciences of Ukraine,
Peremohy, 56, Kyiv-57, 03680, Ukraine,
е-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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.
Key words: electric field, cross-linked polyethylene, water micro-inclusions, water tree, mathematical modeling, electrical current, stressed volume.

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