Charge injection and storage in cross-linked polyethylene insulated cable

Author

Das-Gupta, D.K. ; Cooper, D.E.

fYear

1988

fDate

16-20 Oct 1988

Firstpage

160

Lastpage

166

Abstract

The authors present measurements of the trapped charge in short samples of commercial XLPE (cross-linked polyethylene) insulated power cable. Charge injection was investigated for both AC and DC electric stressing of the samples, for various conditions of temperature and gaseous environment. The injected space charge was examined using three techniques: thermally stimulated discharge current (TSDC), field-assisted TSDC, and the thermal transient current method. These results are compared and the viability of the latter, nondestructive technique to monitor the process of aging in commercial cables is discussed. The presence of a space-charge peak at 60°C in prestressed XLPE insulation is clearly seen using the TSDC method. Field-assisted TSDC illustrates strong ionic conduction at higher temperatures

Keywords

ageing; cable insulation; charge measurement; insulation testing; nondestructive testing; organic insulating materials; polymers; power cables; space charge; thermally stimulated currents; 60 degC; AC; DC; XLPE; aging; commercial cables; cross-linked polyethylene; cross-linked polyethylene insulated cable; electric stressing; injected space charge; insulated power cable; ionic conduction; nondestructive technique; organic insulating materials; polymers; space-charge peak; thermal transient current method; thermally stimulated discharge current; trapped charge; Aging; Cable insulation; Charge measurement; Current measurement; Polyethylene; Power cables; Power measurement; Space charge; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1988. Annual Report., Conference on

Conference_Location

Ottawa, Ont.

Type

conf

DOI

10.1109/CEIDP.1988.26326

Filename

26326