Title :
Studies on chemical and dielectric phenomena in paper - oil insulation due to sulphur compounds in mineral oil
Author :
Akshatha, A. ; Kumar, A. Ravi ; Rajan, J. ; Ramachandra, Haricharan
Author_Institution :
R&D Manage. Div., Central Power Res. Inst., Bangalore, India
Abstract :
This paper presents the results of thermal ageing of paper oil insulation at 140° C when DBDS and mercaptan sulphur are present in oil. It discusses the effects of simultaneous presence of DBDS and mercaptan sulphur at higher temperatures. It is observed that DBDS and Mercaptan sulphur increase copper corrosion. Dielectric response using Frequency Domain Spectroscopy and Polarization/depolarization current in presence of DBDS and Mercaptan sulphur in oil during thermal ageing was studied and the results are discussed.
Keywords :
ageing; copper; dielectric properties; frequency-domain analysis; insulating oils; paper; sulphur compounds; DBDS; chemical phenomena; copper corrosion; depolarization current; dielectric phenomena; dielectric response; frequency domain spectroscopy; mercaptan sulphur; mineral oil; paper-oil insulation; sulphur compounds; temperature 140 C; thermal ageing; Aging; Compounds; Copper; Moisture; Oil insulation; Power transformer insulation; Dibenzyl disulphide; Frequency Domain Spectroscopy; Mercaptan Sulphur; Total Sulphur;
Conference_Titel :
Electrical Insulation Conference (EIC), 2014
Conference_Location :
Philadelphia, PA
Print_ISBN :
978-1-4799-2787-6
DOI :
10.1109/EIC.2014.6869392
