Partial discharge phenomena in paper oil insulation under conditions of copper corrision due to sulphur in oil

Author

Rajan, J. Sundara

Author_Institution

Centre for Collaborative & Adv. Res., Central Power Res. Inst., Bangalore, India

fYear

2009

fDate

19-23 July 2009

Firstpage

530

Lastpage

533

Abstract

The role of Mercaptans in causing copper corrosion is investigated and discussed in this paper. The performance of transformer oil samples has been investigated by conventional accelerated thermal-electrical ageing of paper oil insulation. Discharge measurements have been carried out using PD technique and variation of statistical parameters of discharges due to deposits of copper sulphide in between paper layers are reported and discussed. Study shows definite increase in number of PD events/second and a significant change in histogram patterns with increase in electric stress due to progressive migration of copper sulphide.

Keywords

corrosion; organic insulating materials; partial discharge measurement; Mercaptans; accelerated thermal- electrical ageing; copper corrosion; discharge measurements; electric stress; paper oil insulation; partial discharge; progressive migration; sulphur; Aging; Conductors; Copper; Corrosion; Dielectric measurements; Oil insulation; Partial discharges; Petroleum; Power transformer insulation; Power transformers; Mercaptan sulphur; PD; Sulphur corrosion; paper-oil insulation; pressboard; total sulphur;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 2009. ICPADM 2009. IEEE 9th International Conference on the

Conference_Location

Harbin

Print_ISBN

978-1-4244-4367-3

Electronic_ISBN

978-1-4244-4368-0

Type

conf

DOI

10.1109/ICPADM.2009.5252375

Filename

5252375