A new method for investigating impulse discharge mechanism in the vicinity of minimal breakdown voltage

Author

Torshin, Yu.

Author_Institution

State Sci. Centre of Russia, Moscow, Russia

Volume

1

fYear

1996

fDate

20-23 Oct 1996

Firstpage

319

Abstract

The author has shown previously that a monochannel develops in transformer oil at the positive voltage pulse tail with an amplitude corresponding to the low gap breakdown probability (about 1-10%). A new method for investigating the impulse discharge mechanism, based on this phenomenon, is proposed. Three stages of discharge development are identified: discharge initiation and discharge zone formation; a stage of separation, movement and flashover of the gap by a monochannel; and monochannel transformation and complete breakdown. The characteristics of discharge development at these different stages are discussed

Keywords

discharges (electric); electric breakdown; impulse testing; insulation testing; power transformer insulation; power transformer testing; transformer oil; discharge initiation; discharge zone formation; flashover; impulse discharge mechanism; low gap breakdown probability; minimal breakdown voltage; monochannel development; monochannel transformation; positive voltage pulse tail; transformer oil; Breakdown voltage; Dielectric liquids; Electric breakdown; High speed optical techniques; Hydrocarbons; Oil insulation; Petroleum; Pulse transformers; Tail; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1996., IEEE 1996 Annual Report of the Conference on

Conference_Location

Millbrae, CA

Print_ISBN

0-7803-3580-5

Type

conf

DOI

10.1109/CEIDP.1996.564691

Filename

564691