Inhomogeneous field breakdown in GIS-the prediction of breakdown probabilities and voltages. II. Ion density and statistical time lag

Author

Wiegart, N. ; Niemeyer, L. ; Pinnekamp, F. ; Boeck, W. ; Kindersberger, J. ; Morrow, R. ; Zaengl, W. ; Zwicky, M. ; Gallimberti, L. ; Boggs, S.A.

Author_Institution

BBC Res. Lab., Baden, Switzerland

Volume

3

Issue

3

fYear

1988

fDate

7/1/1988 12:00:00 AM

Firstpage

931

Lastpage

938

Abstract

For pt.I see ibid., vol.3, no.3, p.923-30 (1988). An improved model for the calculation of statistical time lags in SF₆ insulated electrode arrangements for positive impulse voltage is presented. On the basis of physical considerations, the production rate of initial electrons is ascribed to the local density of negative SF₆ ions and to field dependent electron detachment. Values of negative ion densities are measured directly, while the detachment coefficient is determined by a fitting procedure to measurements of statistical time lags

Keywords

electric breakdown of solids; gaseous insulation; ion density; substations; sulphur compounds; SF₆ insulated electrode arrangements; breakdown probabilities; breakdown voltages; electron production rate; field dependent electron detachment; gas insulated substations; inhomogeneous field breakdown; ion density; negative SF₆ ions; positive impulse voltage; statistical time lags; Breakdown voltage; Electric breakdown; Electrons; Insulation; Laboratories; Nonuniform electric fields; Probability; Production; Sulfur hexafluoride; Testing;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.193870

Filename

193870