Condition monitoring of transformer oil

Author

Heydon, R.G. ; Gronowski, B. ; Rungis, J. ; Diesendorf, J. ; Mitchell, F.

Author_Institution

Telecommun. & Ind. Phys., CSIRO, Lindfield, NSW, Australia

Volume

1

fYear

1998

fDate

1-3 Dec. 1998

Firstpage

249

Abstract

A study of the factors affecting the ageing of mineral transformer oil has been undertaken at CSIRO Telecommunications and Industrial Physics in collaboration with TransGrid and Pacific Power. Oils from various manufacturers have been thermally and electrically aged in the laboratory and their ageing parameters have been compared with field samples taken from working transformers of the NSW electricity system. The standard ageing parameters such as acidity, interfacial tension, dielectric loss and moisture content have been measured together with the electrostatic charging tendency (ECT) which is being investigated as an additional diagnostic parameter. Instrumentation for measurement of ECT and tan δ of flowing oil, has been developed. Results for laboratory and field aged samples are presented. Some implications for online condition monitoring are discussed.

Keywords

ageing; condition monitoring; dielectric loss measurement; moisture measurement; pH measurement; surface tension measurement; transformer oil; CSIRO Telecommunications and Industrial Physics; NSW electricity system; Pacific Power; TransGrid; acidity; dielectric loss; electrical ageing; electrostatic charging tendency; interfacial tension; mineral transformer oil; moisture content; online condition monitoring; thermal ageing; Aging; Communication industry; Condition monitoring; Dielectric loss measurement; Dielectric measurements; Electrical capacitance tomography; Electrostatic measurements; Laboratories; Minerals; Oil insulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronic Drives and Energy Systems for Industrial Growth, 1998. Proceedings. 1998 International Conference on

Print_ISBN

0-7803-4879-6

Type

conf

DOI

10.1109/PEDES.1998.1330022

Filename

1330022