Propagation of creepage discharge on solid insulator in insulating oil

Author

Nakao, Y. ; Mouri, A. ; Itooka, T. ; Tagashira, H. ; Nakagami, Y. ; Miyamoto, M. ; Sakai, Y.

Author_Institution

Dept. of Electr. & Electron. Eng., Muroran Inst. of Technol., Japan

fYear

1999

fDate

1999

Firstpage

257

Lastpage

260

Abstract

In relation to the optimum design of internal insulation for HV oil-filled power apparatus, studies of the creepage discharge on the surface of a solid insulator in insulating oil are of practical importance, so much research on this subject has been carried out. In the present paper, the propagation aspects of a creepage discharge on a hard glass (thickness: 3 mm) in insulating oil such as transformer oil are observed in detail under an impulse voltage condition in a point-plane electrode geometry, by using a high-speed schlieren method. In addition, turning our attention to a surface state of a pressboard, the creepage discharge on it is investigated by using a video camera and an image-fiber observation system

Keywords

composite insulating materials; impulse testing; insulation testing; schlieren systems; surface discharges; transformer oil; HV oil-filled power apparatus; creepage discharge; high-speed schlieren method; image-fiber observation; impulse voltage; insulating oil; internal insulation; point-plane electrode geometry; solid insulator; transformer oil; video camera; Cameras; Electrodes; Geometry; Glass; Oil insulation; Petroleum; Power transformer insulation; Solids; Surface discharges; Turning;

fLanguage

English

Publisher

ieee

Conference_Titel

Dielectric Liquids, 1999. (ICDL '99) Proceedings of the 1999 IEEE 13th International Conference on

Conference_Location

Nara

Print_ISBN

0-7803-4759-5

Type

conf

DOI

10.1109/ICDL.1999.798920

Filename

798920