The role of initiatory electrons in highly nonuniform field breakdown

Author

Qiu, X.Q. ; Chalmers, I.D.

Author_Institution

Centre for Electr. Power Eng., Strathclyde Univ., Glasgow, UK

Volume

1

fYear

1998

fDate

7-10 Jun 1998

Firstpage

317

Abstract

The effect of initiatory electrons in SF₆ and mixtures of SF₆ with N₂ and SF₆ with air has been studied by varying the population of free negative ions. It has been found for all gases studied that the dielectric strength of the gas is a decreasing function of the ion population although it appears that there is something of a saturation effect in that as the ion population is increased, the breakdown strength becomes progressively less sensitive to further increase in the ion density

Keywords

SF₆ insulation; electric breakdown; electric strength; gas mixtures; impulse testing; insulation testing; ion density; nitrogen; SF₆; SF₆-N₂; SF₆-N₂ mixture; SF₆-air mixture; breakdown strength; dielectric strength; free negative ions; highly nonuniform field breakdown; impulse breakdown voltage; initiatory electrons role; ion density; ion population; saturation effect; Additives; Breakdown voltage; Corona; Dielectric breakdown; Dielectric measurements; Electric breakdown; Electrodes; Electrons; Power engineering; Sulfur hexafluoride;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1998. Conference Record of the 1998 IEEE International Symposium on

Conference_Location

Arlington, VA

ISSN

1089-084X

Print_ISBN

0-7803-4927-X

Type

conf

DOI

10.1109/ELINSL.1998.704728

Filename

704728