Location of partial discharges in shielded cables in the presence of high noise

Author

Mashikian, Matthew S. ; Palmieri, Francesco ; Bansal, Rajeev ; Northrop, Robert B.

Author_Institution

Electr. Insulation Res. Center, Connecticut Univ., Storrs, CT, USA

Volume

27

Issue

1

fYear

1992

fDate

2/1/1992 12:00:00 AM

Firstpage

37

Lastpage

43

Abstract

Updated information on a partial discharge location system intended to pinpoint the location of defects and/or faults on a shielded buried underground cable is presented. The system is based on the principle of reflectometry. Its salient characteristics include the following two features: (a) an ability to pinpoint the location of a partial discharge source not only along the cable length, but also along the surface of the trench where it is buried; and (b) the ability to operate in a high noise environment. Recent field and laboratory data obtained on noise and techniques for its mitigation are discussed in some detail. These techniques include analog/digital notch filters for the elimination of AM broadcast noise and an adaptive digital filtering scheme which incorporates the transfer function of the cable for added accuracy

Keywords

adaptive filters; cable testing; charge measurement; digital filters; fault location; interference suppression; notch filters; partial discharges; power cables; time-domain reflectometry; underground cables; AM broadcast noise elimination; adaptive digital filtering scheme; buried underground cable; defect location; fault location; high noise; notch filters; partial discharge location; reflectometry; shielded cables; transfer function; Adaptive filters; Cable shielding; Digital filters; Filtering; Laboratories; Partial discharges; Reflectometry; Surface discharges; Transfer functions; Working environment noise;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.123439

Filename

123439