Analysis of transient electric field for epoxy spacer under lightning impulse voltage

Author

Gao, Youhua ; Wang, ErZhi ; Li, Hui ; Hui Li

Author_Institution

Sch. of Electr. Eng., Shenyang Univ. of Technol.

Volume

42

Issue

4

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

595

Lastpage

598

Abstract

A transient electric field takes place in gas-insulated switch-gears (GIS) while lightning impulse voltage is imposed on it. Taking permittivity, conductivity, and polarization loss into consideration, the differential equations of transient field are deduced, where the response caused by lightning impulse voltage is expressed by Duhamel integration. The equivalent conductivity contributed by polarization loss of epoxy spacer is obtained from the experiment. The potential distribution curves of epoxy spacer in GIS are given at representative time, and the electric intensity distribution curves on the spacer surface with respect to time are illustrated. The maximum of intensity on the spacer surface is also calculated, which is compared with the one in the static field. Some distinguishing features of the transient field in GIS are also discussed

Keywords

electric fields; gas insulated switchgear; integral equations; transient analysis; Duhamel integration; GIS; electric intensity distribution curves; epoxy spacer; equivalent conductivity; gas-insulated switch-gears; lightning impulse voltage; polarization loss; potential distribution curves; transient electric field; transient field differential equations; Conductivity; Differential equations; Gas insulation; Geographic Information Systems; Lightning; Optical polarization; Permittivity; Switchgear; Transient analysis; Voltage; Gas-insulated switch-gear (GIS); lightning impulse voltage; spacer; transient electric field;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.872023

Filename

1608276