Electrical aging of XLPE power distribution cables in humid environment

Author

Scarpa, P.C. ; Svatik, A. ; Das-Gupta, D.K.

Author_Institution

Sch. of Electron. Eng. & Comput. Syst., Univ. Coll. of North Wales, Bangor, UK

fYear

1994

fDate

5-8 Jun 1994

Firstpage

380

Lastpage

382

Abstract

The dielectric spectroscopy of the unaged and AC aged (6 kV/mm, 50 Hz, 6000 hours) XLPE cables (15 kV rating) show three relaxation processes in the frequency range of 10^-5 Hz to 10⁵ Hz. The behaviour of relaxation at the low frequency 10^-5 Hz to 10^-4 Hz changes significantly with the progressive aging of the cable and the nature of the thermally stimulated discharge current (TSDC) data are in qualitative agreement with that of the low frequency dispersion. The three relaxation processes are represented by a parallel combination of three R-C circuits

Keywords

XLPE insulation; ageing; dielectric relaxation; distribution networks; humidity; power cable insulation; power cable testing; thermally stimulated currents; 15 kV; 1E-5 to 1E5 Hz; 50 Hz; 6000 h; AC aging; R-C circuits; XLPE power distribution cables; dielectric spectroscopy; electrical aging; humid environment; low frequency dispersion; parallel combination; relaxation processes; thermally stimulated discharge current; Aging; Cables; Dielectric losses; Dielectric measurements; Frequency; Polyethylene; Polymers; Power distribution; Space charge; Stress;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium on

Conference_Location

Pittsburgh, PA

ISSN

1089-084X

Print_ISBN

0-7803-1942-7

Type

conf

DOI

10.1109/ELINSL.1994.401490

Filename

401490