Semi-empirical high-field conduction model for polyethylene and implications thereof

Author

Boggs, S.A.

Author_Institution

Dept. of Electr. Eng., Toronto Univ., Ont., Canada

Volume

2

Issue

1

fYear

1995

fDate

2/1/1995 12:00:00 AM

Firstpage

97

Lastpage

106

Abstract

A semi-empirical model for high-field conduction in polyethylene is developed on the basis of data in the literature for ac conductivity in the range of 30 to 60 kV/mm and `charge injection´ from a needle in the range of 160 kV/mm. The model is used to compute high-field conduction-related phenomena by solving Poisson´s equation with field-dependent conductivity and time-dependent applied voltage for a highly inhomogeneous field geometry. Parameters computed include field, current density, charge density, power density, and force density. Temperature rise in the dielectric is estimated based on the computed power density

Keywords

current density; dielectric materials; electric breakdown; electrical conductivity; high field effects; polyethylene insulation; Poisson´s equation; ac conductivity; charge density; charge injection; current density; dielectric insulation; field-dependent conductivity; force density; high-field conduction model; inhomogeneous field geometry; polyethylene; power density; semi-empirical model; temperature rise; time-dependent applied voltage; Computational geometry; Conductivity; Current density; Dielectrics; Needles; Poisson equations; Polyethylene; Solid modeling; Temperature; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.368684

Filename

368684