Flashover path of charged spacer surfaces in compressed gases

Author

Theophilus, G.D. ; Shungyuan Li ; Srivastava, K.D.

Author_Institution

British Columbia Univ., Vancouver, BC, Canada

fYear

1992

Firstpage

448

Lastpage

453

Abstract

While investigating the effects of accumulation of charges on insulating surfaces in gas-insulated apparatus, it was observed that the flashover paths deviated from the surface of the spacer. In the present work, it is shown that the observed paths are consistent with the computed electric field patterns in the presence of charges on the spacer surfaces. The results reported were obtained with hemispherically capped rod electrodes of diameters varying between 3.2 mm and 10 mm and cylindrical spacers of 40-mm diameter and 30-mm height subjected to lightning impulses. Surface charges were measured in situ using electrostatic probes

Keywords

electric fields; flashover; gaseous insulation; surface discharges; charged spacer surfaces; compressed gases; computed electric field patterns; electrostatic probes; flashover paths; gas-insulated apparatus; hemispherically capped rod electrodes; lightning impulses; Computational modeling; Corona; Current measurement; Electrodes; Electrostatic measurements; Flashover; Gas insulation; Gases; Lightning; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on

Conference_Location

Victoria, BC

Print_ISBN

0-7803-0565-5

Type

conf

DOI

10.1109/CEIDP.1992.283211

Filename

283211