Partial discharge measurements in the three-layer dielectrics with a barrier

authored by

S. M. Lebedev, O. S. Gefle, Y. P. Pokholkov, E. Gockenbach, H. Borsi, V. Wasserberg, N. Abedi, J. Szczechowski

Abstract

It is a well-known fact that the breakdown voltage of dielectrics in a divergent field may be increased by using an additional insulating layer (A barrier) placed at the optimal position between the electrodes. In our previous works we reported that this effect is observed not only in the divergent electric field but also in moderately non-uniform and quasi-uniform electric fields. This paper is devoted to the investigation of the barrier effect in solid dielectrics in a quasi-uniform electric field, i.e. the study of relationship between partial discharge activity and the barrier position in the insulating gap. It is established that PD-parameters depend on the barrier position in the gap. In particular, the ignition voltage of PD with magnitude of 10 pC is increased by 20-50% at the optimal barrier position compared to that for other barrier positions.

Organisation(s)

High Voltage Engineering and Asset Management Section (Schering Institute)

External Organisation(s)

Tomsk Polytechnic University

Type

Conference article

Journal

Conference Record of IEEE International Symposium on Electrical Insulation

Pages

123-126

No. of pages

4

ISSN

0164-2006

Publication date

2004

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Building and Construction, Electrical and Electronic Engineering