Characteristics of PD pulses in electrical trees and interfaces in extruded cables

Author

Densley, J. ; Kalicki, T. ; Nodolny, Z.

Author_Institution

Ontario Power Technol., Canada

Volume

8

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

48

Lastpage

57

Abstract

The characteristics of partial discharge (PD) occurring within electrical trees in extruded cable insulation, and also at model interfaces between a cable and its accessories, have been investigated. A wideband PD detection system was used that enabled the true shape of the PD pulses to be measured. The rise- and fall-times, pulse width, amplitude and frequency of the pulses were recorded as electrical trees grew through the insulation, and also as the tracking progressed along a model cable/accessory interface. The PD pulse characteristics in electrical trees varied with time of voltage application and also with the electrical stress in the insulation. Differences in the PD characteristics of electrical trees in the bulk of a polymer and at interfaces between polymers were observed

Keywords

XLPE insulation; ethylene-propylene rubber; partial discharges; power cable insulation; trees (electrical); EPR insulation; PD pulses; XLPE insulation; cable/accessory interface; electrical stress; electrical trees; extruded cable insulation; fall-times; model interfaces; polymer interfaces; pulse amplitude; pulse frequency; pulse width; rise-times; time of voltage application; wideband PD detection system; Cable insulation; Dielectrics and electrical insulation; Partial discharges; Polymers; Pulse measurements; Pulse shaping methods; Shape measurement; Space vector pulse width modulation; Trees - insulation; Wideband;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.910425

Filename

910425