Diagnosing the insulation condition of dry type transformers using a multiple sensor partial discharge localization technique

verfasst von

Peter Werle, Hossein Borsi, Ernst Gockenbach

Abstract

In this contribution an electrical partial discharge (PD) measurement technique for dry type transformer is presented. The method has been tested in the laboratory as well as on a transformer in the test bay using an automated partial discharge evaluation based on the comparison of quasi simultaneously detected PD patterns at different decoupling points. Therefore a multiple sensor system is placed on the surface of the transformer coil, thus PD signals can be measured at various sites along the winding before they are processed and compared. The described technique enables beside a localization of the PD source a determination of the apparent charge, which can be more accurate than conventional narrowband PD measurements via a quadripole in parallel. A discussion of the results leads therefore to a proposal about improvements concerning the calibration for actual PD routine tests on dry type transformers.

Organisationseinheit(en)

Fachgebiet Hochspannungstechnik und Asset Management (Schering-Institut)

Typ

Konferenzaufsatz in Fachzeitschrift

Journal

Conference Record of IEEE International Symposium on Electrical Insulation

Seiten

166-169

Anzahl der Seiten

4

ISSN

0164-2006

Publikationsdatum

2002

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektrotechnik und Elektronik, Bauwesen