Assessing the risk of failure due to particle contamination of GIS using the UHF technique

Author

Sellars, A.G. ; Farish, O. ; Hampton, B.F.

Author_Institution

Rolls Royce Ind. Power Group, Hebburn, UK

Volume

1

Issue

2

fYear

1994

fDate

4/1/1994 12:00:00 AM

Firstpage

323

Lastpage

331

Abstract

The ultra high frequency (UHF) technique has been used to study the partial discharges produced by free conducting particles in gas insulated substations (GIS) with a view to predicting the probability of particle-triggered breakdown. Statistical techniques have been developed to describe the motion of a single particle. It is possible to identify whether the particle is capable of crossing to the busbar, which is a necessary condition for particle-triggered breakdown. In addition, the technique can be used to assess the size of the particle, which is useful for making a qualitative assessment of the breakdown risk. The implications for the continuous discharge monitoring of GIS are discussed

Keywords

electric breakdown of gases; failure analysis; gaseous insulation; partial discharges; switchgear testing; GIS; UHF technique; breakdown risk; continuous discharge monitoring; free conducting particles; partial discharges; particle contamination; particle-triggered breakdown; Contamination; Electric breakdown; Electrodes; Fault location; Geographic Information Systems; Monitoring; Partial discharges; Signal detection; Substations; Testing;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.300265

Filename

300265