Decay characteristics of residual dc voltage for 1000 kV GIS

Author

Yamagata, Y. ; Rokunohe, T. ; Endou, F.

Author_Institution

Tokyo Electr. Power Co., Chiyoda-Ku, Japan

Volume

2

fYear

2003

fDate

1-5 June 2003

Firstpage

614

Abstract

Volume and surface resistivity are varied by temperature and electric field strength of an insulator. As change of the insulator electric field strength is very small during residual dc voltage measurement, insulator resistivity depends on temperature. So insulator resistivity is estimated by fundamental characteristics of resistivity as a function of temperature. Then the decay time constant of residual dc voltage for l000 kV GIS is calculated by resistivity based on the calculated insulator resistance for the temperature. Finally the measured decay time constant is compared with the calculated one.

Keywords

electric strength; electrical resistivity; gas insulated substations; gas insulated switchgear; 1000 kV; GIS; decay time constant; insulator electric field strength; insulator resistivity; surface resistivity; Computational Intelligence Society; Conductivity; Dielectrics and electrical insulation; Electrodes; Geographic Information Systems; Prototypes; Surges; Temperature; Testing; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on

ISSN

1081-7735

Print_ISBN

0-7803-7725-7

Type

conf

DOI

10.1109/ICPADM.2003.1218492

Filename

1218492