Moisture and Aging Effect on the Creepage Discharge Characteristics at the Oil/Transformer-board Interface under Divergent Field

Author

Dai, J. ; Wang, Z.D. ; Jarman, P.

Author_Institution

Sch. of Electr. & Electron. Eng., Univ. of Manchester, Manchester

fYear

2008

fDate

26-29 Oct. 2008

Firstpage

662

Lastpage

665

Abstract

The creepage discharge on pressboard barriers is regarded as one of the failure modes for power transformers. In literature, extensive research has been carried out previously to investigate the nature of creepage discharges, while little work was done to study the creepage discharge on the aged transformer board. A literature survey will be given first to summarise the understanding of creepage discharges on cellulose/oil interfaces. The effects of the aging products like moisture and absorbed sediments on the characteristics of creepage discharges will be investigated.

Keywords

ageing; discharges (electric); failure analysis; moisture; power transformer insulation; transformer oil; aging effect; cellulose/oil interfaces; creepage discharge characteristics; moisture effect; oil/transformer-board interface; power transformer faults; pressboard barriers; transformer insulation; Aging; Creep; Dielectrics and electrical insulation; Fault location; Moisture; Oil insulation; Petroleum; Power transformer insulation; Power transformers; Surface discharges;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2008. CEIDP 2008. Annual Report Conference on

Conference_Location

Quebec, QC

Print_ISBN

978-1-4244-2548-8

Electronic_ISBN

978-1-4244-2549-5

Type

conf

DOI

10.1109/CEIDP.2008.4772837

Filename

4772837