DocumentCode :
2943364
Title :
Investigation of aging rate in polymer films subjected to surface discharges under distorted voltage
Author :
Bozzo, R. ; Gemme, C. ; Guastavino, F. ; Montanari, G.C.
Author_Institution :
Dept. of Electr. Eng., Genoa Univ., Italy
Volume :
2
fYear :
1997
fDate :
19-22, Oct 1997
Firstpage :
435
Abstract :
This paper presents the first results of a research carried out with the purpose of investigating life performance and degradation mechanisms of electrical insulating materials subjected to distorted ac voltage. Accelerated life tests were performed until breakdown, measuring partial discharge evolution with time, by a test arrangement suitable to induce surface discharges on insulating material specimens. Harmonic voltages having different frequencies and phase, in the range of those usually recorded in electrical plants, were superimposed to the fundamental component. The tested material is polyethylene terephthalate. Either reduction or increase of life, with respect to sinusoidal conditions, were detected, dependently on the way as harmonic voltages are summed up. In particular, significant life shortening was obtained in the cases when voltage maximum is increased due to the contribution of harmonics. These result can be directly correlated with the partial-discharge pattern structure
Keywords :
ageing; electric breakdown; harmonic distortion; insulation testing; life testing; organic insulating materials; partial discharges; polymer films; surface discharges; accelerated life test; aging rate; breakdown; degradation; distorted AC voltage; electrical insulating material; harmonic voltage; partial discharge; polyethylene terephthalate; polymer film; surface discharge; Aging; Degradation; Dielectrics and electrical insulation; Life estimation; Life testing; Materials testing; Performance evaluation; Polymer films; Surface discharges; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference on
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-7803-3851-0
Type :
conf
DOI :
10.1109/CEIDP.1997.641105
Filename :
641105
Link To Document :
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