Effect of pressure on the development of prebreakdown streamers

Author

MCKenny, Peter J. ; Forster, Eric O. ; Kelley, Edward F. ; Hebner, Robert E.

Author_Institution

Dept. of Electr. Eng., Maine Univ., Orono, ME, USA

fYear

1988

fDate

16-20 Oct 1988

Firstpage

263

Lastpage

268

Abstract

The initiation of streamers in a liquid under the application of negative impulse voltages to a needle-sphere gap is investigated. A square pulse is applied so that the prebreakdown streamer will not grow to breakdown. With application of pressure, the initial streamer is observed to collapse and disappear while the voltage remains on the tip. When the voltage is chopped, a new streamer appears which resembles the structure of the anode streamers. Its branches do not strictly follow the previous branches of the cathode streamer which injected the charge in the liquid. Using a simple model, approximately 11 nC is estimated to be injected into the liquid producing a charge density of 49 μC/cm ³

Keywords

dielectric properties of liquids and solutions; discharges (electric); electric breakdown of liquids; cathode streamer; charge density; charge injection; development of prebreakdown streamers; liquid; model; needle-sphere gap; negative impulse voltages; pressure; Anodes; Breakdown voltage; Cathodes; Electric breakdown; Electrodes; NIST; Needles; Physics; Shape; Streaming media;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1988. Annual Report., Conference on

Conference_Location

Ottawa, Ont.

Type

conf

DOI

10.1109/CEIDP.1988.26343

Filename

26343