Dark current measurements in pressurized air, N2, and SF6

Author

Zavattoni, L. ; Lesaint, O. ; Gallot-Lavallee, O.

Author_Institution

Siemens Transm. & Distrib., Grenoble, France

fYear

2013

fDate

20-23 Oct. 2013

Firstpage

659

Lastpage

662

Abstract

Dark current measurements in pressurized gases at high electric field are performed in a coaxial electrode geometry. Three main parameters are investigated: the influence of electrode surface roughness, the nature and pressure of gas, the presence of water. Currents are measured in both negative and positive polarities. A large influence of electrode surface roughness and of the gas water content is observed. Most of results suggest that charge injection from the electrode constitute the basic mechanism of high field conduction through pressurized gases, and this mechanism is considerably enhanced when water is present.

Keywords

SF₆ insulation; charge injection; electric current measurement; surface roughness; SF₆; charge injection; coaxial electrode geometry; current measurement; dark current measurements; electric field; electrode surface roughness; gas nature; gas pressure; gas water content; high-field conduction; negative polarity; nitrogen; positive polarity; pressurized air; pressurized gas; Current measurement; Dark current; Electric fields; Electrodes; Gases; Sulfur hexafluoride; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena (CEIDP), 2013 IEEE Conference on

Conference_Location

Shenzhen

Type

conf

DOI

10.1109/CEIDP.2013.6748125

Filename

6748125