Non-invasive optical fibre acoustic monitoring of partial discharges within GIS

Author

Cosgrave, J.A. ; Murphy, M.M. ; Jones, G.R. ; Spencer, J.W. ; Wilson, A.

Author_Institution

Liverpool Univ., UK

fYear

1992

fDate

7-10 Sep 1992

Firstpage

274

Lastpage

277

Abstract

Although GIS were once thought to be maintenance free, there has been a number of reports of system failures throughout the world. These failures are reported to be caused by partial discharge activity within the GIS enclosure, Spaeren (1985). The authors report on a noninvasive fibre-optic technique which is shown to be sensitive enough to detect displacements of 10^-12 m and has a good response at 10 kHz but can respond to signals up to 40 kHz. This optical system is a portable interferometric fibre-dyne system and can be a cost-effective, retro-fittable solution for monitoring partial discharges in GIS. Comparison with a commercially available piezo-electric acoustic emission sensor is also made

Keywords

acoustic emission; fibre optic sensors; gaseous insulation; light interferometry; partial discharges; substations; 10 kHz to 40 kHz; acoustic monitoring; fibre dyne interferometer; gas insulated subsystems; monitoring partial discharges; noninvasive measurement; partial discharge activity; partial discharge detection; portable interferometric fibre-dyne system; system failures;

fLanguage

English

Publisher

iet

Conference_Titel

Dielectric Materials, Measurements and Applications, 1992., Sixth International Conference on

Conference_Location

Manchester

Print_ISBN

0-85296-551-6

Type

conf

Filename

186935