Influence of insulating barrier on the creepage discharge in transformer oil

Author

Nakao, Y. ; Naruse, M. ; Suzuki, Y. ; Itoh, H. ; Sakai, Y. ; Tagashira, H.

Author_Institution

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

Volume

4

Issue

6

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

775

Lastpage

779

Abstract

The propagation aspects of a creepage discharge in transformer oil are observed simultaneously and in detail under a positive impulse voltage condition, by means of a high-speed Schlieren optical system, an LED current measurement system and a charge measurement system using a capacitor. In the present paper, the influence of the material type and the thickness of insulating barriers on the propagation of the impulse creepage discharge are discussed for a point to plane electrode geometry. In addition, the influence of a barrier surface to the electric field direction on the propagation of the impulse creepage discharge is discussed for a parallel plane electrode gap with a protruding point

Keywords

charge measurement; electric current measurement; high-speed optical techniques; impulse testing; insulation testing; power transformer insulation; power transformer testing; schlieren systems; surface discharges; transformer oil; LED current measurement system; barrier surface; charge measurement system; creepage discharge propagation; high-speed Schlieren optical system; insulating barrier effect; parallel plane electrode gap; point to plane electrode geometry; positive impulse voltage condition; protruding point; streamer-like density changes; transformer oil; Capacitors; Charge measurement; Current measurement; Electrodes; High speed optical techniques; Light emitting diodes; Oil insulation; Optical materials; Optical propagation; Power transformer insulation;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.654703

Filename

654703