Assessment of insulation in aged power transformers and the correlation between the electrical and chemical properties

Author

Darveniza, M. ; Saha, T.K. ; Hill, D.J.T. ; Le, T.T.

Author_Institution

Queensland Univ., St. Lucia, Qld., Australia

fYear

1992

Firstpage

671

Lastpage

678

Abstract

Interfacial polarization and dissipation factor measurements have been made on paper-insulated conductor samples collected from an old retired transformer and on samples which had been subjected to accelerated aging. The molecular weights of the samples were also studied by GPC (gel permeation chromatography) analysis. Good correlation has been obtained between the methods for detecting changes in the properties of the insulation papers. Preliminary results are presented which also show very good correlation between the electrical and chemical test methods

Keywords

ageing; chromatography; dielectric polarisation; insulation testing; life testing; molecular weight; paper; power transformers; transformer insulation; accelerated aging; aged power transformers; chemical properties; dissipation factor; electrical properties; gel permeation chromatography; insulation assessment; interfacial polarization; molecular weights; paper-insulated conductor samples; Accelerated aging; Breakdown voltage; Conductors; Dielectrics and electrical insulation; Gas insulation; Oil insulation; Polarization; Power transformer insulation; Power transformers; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on

Conference_Location

Victoria, BC

Print_ISBN

0-7803-0565-5

Type

conf

DOI

10.1109/CEIDP.1992.283141

Filename

283141