Field solution in polluted insulators with non-symmetric boundary conditions

Author

Morales, N. ; Asenjo, E. ; Valdenegro, A.

Author_Institution

Dept. of Electr. Eng., Chile Univ., Santiago, Chile

Volume

8

Issue

2

fYear

2001

fDate

4/1/2001 12:00:00 AM

Firstpage

168

Lastpage

172

Abstract

A finite difference (FD) method to calculate the electric field in polluted insulators with asymmetric boundary conditions is proposed. The method is based on neglecting the displacement currents that circulate through the porcelain and through the air, in comparison with the conduction currents that circulate over the semiconductive pollution layer covering the insulator. This assumption reduces the 3D problem to a 2D one over the insulator surface. The FD method is applied by superposing a grid composed of parallels and meridians over the insulator surface, setting up an FD equation for each mode, and solving the resultant set of simultaneous equations

Keywords

finite difference methods; insulator contamination; porcelain insulators; 2D problem; conduction currents; displacement currents; finite difference method; nonsymmetric boundary conditions; polluted insulators; porcelain; semiconductive pollution layer; simultaneous equations; Air pollution; Arc discharges; Boundary conditions; Dielectrics and electrical insulation; Equations; Frequency; Porcelain; Surface contamination; Surface discharges; Surface resistance;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.919916

Filename

919916