One-dimensional model for nonlinear stress control in cable terminations

Author

Rhyner, J. ; Bou-Diab, M.G.

Author_Institution

ABB Corp. Res. Ltd., Baden, Switzerland

Volume

4

Issue

6

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

785

Lastpage

791

Abstract

A one-dimensional model for field control in cable terminations is analyzed mathematically both for linear and nonlinear field grading materials. Far an applied ac voltage, the concept of the penetration length allows for a useful characterization of the voltage profile, even for materials where both the conductivity and the permittivity are field dependent. For lightning impulse events an analytical solution for purely resistive field control is presented, allowing for an arbitrarily strong nonlinearity of the conductivity. The model results yield a useful input for more detailed finite element calculations. The results show that conclusions for nonlinear field control based on linear calculations in general are misleading

Keywords

electric connectors; electric fields; finite element analysis; lightning; modelling; partial differential equations; power cable insulation; voltage control; voltage distribution; analytical solution; applied ac voltage; cable terminations; electrical power lines; field dependent conductivity; field dependent permittivity; finite element calculations; lightning impulse events; linear field grading materials; nonlinear conductivity; nonlinear field control; nonlinear field grading materials; nonlinear stress control; one-dimensional model; penetration length; purely resistive field control; voltage profile; Cable TV; Cable shielding; Conducting materials; Conductivity; Equivalent circuits; Lightning; Mathematical model; Permittivity; Stress control; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.654706

Filename

654706