Study on influence of oxidation on static electrification in transformer oil

Author

Shima, Keisuke ; Tsuchie, M. ; Kozako, Masahiro ; Hikita, Masayuki ; Gosho, Yoshihiro

Author_Institution

Fac. of Eng., Kyushu Inst. of Technol., Fukuoka, Japan

fYear

2014

fDate

June 29 2014-July 3 2014

Firstpage

1

Lastpage

4

Abstract

In oil-immersed transformers, static electrification phenomenon is caused by insulating oil flowing on solid insulator such as pressboard (PB). In Japan, as a countermeasure, 1, 2, 3-benzotriazol (BTA) is used to suppress static electrification. But, recent years, it has been reported that static electrification phenomenon increases with aging owing to oxidation of insulating oil, operation history of transformers with overhaul, and so on [1]. This paper deals with the verification of BTA effect on the increase of electrostatic charging tendency (ECT) due to aging, and evaluation for the influence of air exposure on static electrification during overhaul using the aging oil from 500 kV transformer by performing overhaul process according to actual operation and accelerated aging test.

Keywords

ageing; oxidation; power transformers; static electrification; transformer oil; BTA; ECT; Japan; benzotriazol; electrostatic charging tendency; insulating oil; oil-immersed transformers; oxidation influence; pressboard; solid insulator; static electrification; transformer oil; voltage 500 kV; Accelerated aging; Heating; Power transformer insulation; Time measurement; BTA; electrostatic charging tendency; insulating oil; static electrification; transformer; volume resistivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Dielectric Liquids (ICDL), 2014 IEEE 18th International Conference on

Conference_Location

Bled

Type

conf

DOI

10.1109/ICDL.2014.6893109

Filename

6893109