Copper Corrosion phenomenon in transformers due to DBDS in mineral transformer oil

Author

Akshatha, A. ; Kumar, Ravindra ; Sundara, Rajan J. ; Ramachandra, Haricharan

Author_Institution

R & D Manage. Div., Central Power Res. Inst., Bangalore, India

fYear

2013

fDate

20-23 Oct. 2013

Firstpage

826

Lastpage

829

Abstract

The presence of Dibenzyl disulphide (DBDS) in transformer oil is one of the causes for copper corrosion and consequent copper sulphide formation. This Study has been carried out on paper oil insulation after thermal ageing in transformer oil containing different concentrations of DBDS. The studies have been repeated on laboratory model transformer after thermal ageing. Effect of copper corrosion is studied in terms of subtle changes in Frequency Domain Spectroscopy (FDS), Polarization Depolarization Current (PDC) and variations in real and imaginary permittivity with frequency.

Keywords

ageing; copper; frequency-domain analysis; minerals; paper; permittivity; power transformer insulation; transformer oil; DBDS; FDS; PDC; copper corrosion phenomenon; copper sulphide formation; dibenzyl disulphide; frequency domain spectroscopy; imaginary permittivity; mineral transformer oil; paper oil insulation; polarization depolarization current; real permittivity; thermal ageing; Aging; Copper; Oil insulation; Permittivity; Power transformer insulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena (CEIDP), 2013 IEEE Conference on

Conference_Location

Shenzhen

Type

conf

DOI

10.1109/CEIDP.2013.6747432

Filename

6747432