Partial discharge patterns and degradation diagnosis in polyethylene and polyimide

Author

Ichikawa, H. ; Ito, K. ; Suzuoki, Y. ; Mizutani, T. ; Uchida, K.

Author_Institution

Dept. of Electr. Eng., Nagoya Univ., Japan

Volume

2

fYear

1994

fDate

3-8 Jul 1994

Firstpage

630

Abstract

The temporal change of partial discharge (PD) pattern (φ-q-n pattern) was measured up to breakdown for both polyimide (PI) and low-density polyethylene (PE) films with CIGRE Method-II electrode system by using a prototype computer-aided PD measurement and expert system. As a result, the amount of adsorbed water, the humidity and the gas constituent in the gap proved to heavily affect the temporal change of PD patterns. It was suggested that these results were interpreted in terms of the electron attachment-detachment process of both oxygen and moisture, which led to an increase of the discharge time lag. The frequency acceleration by a factor of 3 proved that the temporal change of PD patterns was invariable under certain conditions

Keywords

automatic test equipment; automatic testing; electric breakdown; expert systems; insulation testing; partial discharges; polyethylene insulation; polymer films; power engineering computing; LDPE; adsorbed water; computer-aided PD measurement; degradation diagnosis; discharge time lag; electrical insulation; electron attachment-detachment process; expert system; frequency acceleration; gas constituent; humidity; partial discharge patterns; polyethylene; polyimide; temporal change; Degradation; Diagnostic expert systems; Electric breakdown; Electrodes; Partial discharge measurement; Partial discharges; Plastic films; Polyethylene; Polyimides; Prototypes;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 1994., Proceedings of the 4th International Conference on

Conference_Location

Brisbane, Qld.

Print_ISBN

0-7803-1307-0

Type

conf

DOI

10.1109/ICPADM.1994.414089

Filename

414089