The effect of field-enhanced injection and dissociation on the conduction of highly-insulating liquids

Author

Pontiga, F. ; Castellanos, A.

Author_Institution

Dept. de Electronica y Electromagnetismo, EUAT, Seville, Spain

Volume

3

Issue

6

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

792

Lastpage

799

Abstract

A generalization of the Thomson model to include field-enhanced dissociation in the bulk (the Onsager effect) and unipolar charge injection, without recombination between electrolytic and injected ions, is formulated for nonpolar dielectric liquids. In the case of an autonomous injection of charge, approximate analytical solutions are given for the dissociation and the injection current densities. A comparison with the “exact” numerical solution is done to determine the regions of validity of the approximate solutions. The general case of field-enhanced dissociation and nonautonomous injection also is investigated numerically

Keywords

dielectric liquids; dissociation; electrical conductivity; Onsager effect; Thomson model; autonomous injection; conduction; current density; field-enhanced dissociation; field-enhanced injection; insulating liquid; nonautonomous injection; nonpolar dielectric liquid; unipolar charge injection; Current density; Dielectric liquids; Dielectrics and electrical insulation; Electrical equipment industry; Electrodes; Electromagnetic modeling; Equations; Interference; Power transformer insulation; Space charge;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.556561

Filename

556561