PD characteristics and mechanisms in artificial air-filled voids at room and liquid nitrogen temperatures

Author

Tsuru, S. ; Nakamura, M. ; Mine, T. ; Sakai, K. ; Suehiro, J. ; Hara, M.

Author_Institution

Dept. of Electron., Kyushu Univ., Fukuoka, Japan

Volume

6

Issue

1

fYear

1999

fDate

2/1/1999 12:00:00 AM

Firstpage

43

Lastpage

50

Abstract

In this study, partial discharge (PD) characteristics in artificial air-filled voids at room and liquid nitrogen temperatures were investigated experimentally. It was found that minimum PD inception voltage at liquid nitrogen temperature (77 K) decreased with decrease in ambient temperature due to condensation of oxygen in the void. By observation of PD current pulses and light images, it was found that there were three modes of discharge: streamer, Townsend and glow like discharges in PD at room and liquid nitrogen temperatures. Especially the mode at liquid nitrogen temperature changes markedly with the stress time

Keywords

Townsend discharge; glow discharges; partial discharges; voids (solid); 300 K; 77 K; PD inception voltage; Townsend discharge; artificial air-filled void; current pulse; electric stress; glow discharge; insulator; light image; liquid nitrogen temperature; oxygen condensation; partial discharge; room temperature; streamer discharge; Cryogenics; Glass; Nitrogen; Optical sensors; Oscilloscopes; Partial discharges; Solids; Stress; Temperature; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.752008

Filename

752008