Study on diagnostic method of deterioration for power capacitors

Author

Yorozuya, T. ; Takasu, N. ; Suganuma, K. ; Takahashi, K. ; Kamba, K. ; Ichiwara, T.

Author_Institution

Tokyo Electric Power Co., Japan

fYear

1991

fDate

8-12 Jul 1991

Firstpage

745

Abstract

For oil-impregnated type capacitors, thermal and electrical accelerating deterioration tests were conducted to study their various characteristics until their dielectric breakdown occurred. A diagnosis method for the deterioration analysis of gases dissolved in oil was also studied. CO+CO₂ gas is shown to be an effective index for the thermal deterioration. Since C₂H₂ is generated only by the partial discharge, it is possible to estimate the occurrence of partial discharge. While capacitors are deteriorated by thermal stress, it is considered that the dielectric strength of the insulating oil decreases due to gases dissolved in oil

Keywords

ageing; electric breakdown of liquids; insulating oils; partial discharges; power capacitors; deterioration; diagnostic method; dielectric breakdown; dielectric strength; oil-impregnated type; partial discharge; power capacitors; thermal deterioration; Dielectric breakdown; Dissolved gas analysis; Gases; Life estimation; Partial discharges; Petroleum; Power capacitors; Testing; Thermal conductivity; Thermal stresses;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on

Conference_Location

Tokyo

Print_ISBN

0-87942-568-7

Type

conf

DOI

10.1109/ICPADM.1991.172173

Filename

172173