Practical implementation of ultrawideband partial discharge detectors

Author

Stone, G.C. ; Sedding, H.G. ; Fujimoto, N. ; Braun, J.M.

Author_Institution

Ontario Hydro, Toronto, Ont., Canada

Volume

27

Issue

1

fYear

1992

fDate

2/1/1992 12:00:00 AM

Firstpage

70

Lastpage

81

Abstract

It is shown that significant improvements in partial discharge (PD) measurement can be achieved through the use of ultrawideband (UWB) coupling techniques. These enhancements are principally in the areas of increased sensitivity, external noise rejection, and better understanding of the physics of the PD process. Examples of the improvements achievable by the use of UWB techniques are discussed for the cases of rotating machines and GIS. A new PD coupler which has a frequency response extending into the GHz range is demonstrated to enable reliable discrimination of PD signals from noise on operating turbine generators. Preliminary results from a fundamental study on PD in epoxy resins, show that there are two types of PD phenomena, `fast´ and `slow´

Keywords

charge measurement; fault location; insulation testing; machine insulation; partial discharges; switchgear testing; GIS; PD coupler; epoxy resins; external noise rejection; frequency response; partial discharge measurement; rotating machines; sensitivity; turbine generators; ultrawideband coupling; ultrawideband partial discharge detectors; Frequency response; Geographic Information Systems; Noise generators; Partial discharge measurement; Partial discharges; Physics; Rotating machines; Signal generators; Turbines; Ultra wideband technology;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.123442

Filename

123442