Title :
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
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;
Conference_Titel :
Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium on
Conference_Location :
Pittsburgh, PA
Print_ISBN :
0-7803-1942-7
DOI :
10.1109/ELINSL.1994.401490
