The determination of charge behavior at a liquid-solid interface

Author

Nelson, J.K. ; Lee, M.J. ; Kaushik, R.R. ; McMullan, W.J.

Author_Institution

Dept. of Electr. Power Eng., Rensselaer Polytech. Inst., Troy, NY, USA

fYear

1990

fDate

28-31 Oct 1990

Firstpage

684

Lastpage

689

Abstract

A methodology has been developed to provide information on the way in which charges distribute and relax on cellulose surfaces and on their impact on the breakdown of oil-cellulose insulation. Using this approach, not only can the charge be monitored in time, but its spatial distribution can be ascertained. The method has further been extended to apply an interrogating impulse voltage across a charged surface which permits the impact of surface charge on creep breakdown to be determined. Field plots which allow the calculation of a power frequency (capacitive) distribution in the presence of a static charge reveal that the impact of accumulated surface charge on the dielectric integrity of transformer structures is significant and should be considered in design criteria

Keywords

impulse testing; insulating oils; insulation testing; transformer insulation; breakdown; cellulose surfaces; charge behavior; creep breakdown; dielectric integrity; interrogating impulse voltage; liquid-solid interface; oil-cellulose insulation; power frequency distribution; spatial distribution; surface charge; transformer structures; Breakdown voltage; Creep; Electric breakdown; Electrodes; Oil insulation; Petroleum; Power transformer insulation; Power transformers; Stress; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1990. Annual Report., Conference on

Conference_Location

Pocono Manor, PA

Type

conf

DOI

10.1109/CEIDP.1990.201417

Filename

201417