Title :
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
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;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena (CEIDP), 2013 IEEE Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/CEIDP.2013.6747432
