Investigations into effective methods for assessing the condition of insulation in aged power transformers

Author

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

Author_Institution

Dept. of Electr. & Comput. Eng., Queensland Univ., Qld., Australia

Volume

13

Issue

4

fYear

1998

fDate

10/1/1998 12:00:00 AM

Firstpage

1214

Lastpage

1223

Abstract

This paper investigates the effective diagnostic technique(s) for assessing the condition of insulation in aged power transformers. A number of electrical, mechanical and chemical techniques were investigated. Many of these techniques are already used by utility engineers and two comparatively new techniques are proposed in this paper. Results showing the effectiveness of these diagnostics are presented and correlation between the techniques are also presented. Finally, merits and suitability of different techniques are discussed in this paper

Keywords

ageing; electric breakdown; insulation testing; power transformer insulation; power transformer testing; aged power transformers; chemical techniques; diagnostics; electrical techniques; insulation condition assessment; mechanical techniques; Aging; Chemical analysis; Dielectric loss measurement; Dielectrics and electrical insulation; Insulation testing; Oil insulation; Partial discharges; Petroleum; Power transformer insulation; Power transformers;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.714487

Filename

714487