Experimental simulation of effects of copper sulphide on insulation system of transformers

Author

Khan, Faheem Ahmed ; Rajan, J. Sundara

Author_Institution

Dept. of Electr. & Electron. Eng., Ghousia Coll. of Eng., Ramanagaram, India

Volume

22

Issue

1

fYear

2015

fDate

Feb. 2015

Firstpage

571

Lastpage

580

Abstract

The presence of Corrosive sulphur in mineral transformer oil affects the performance of insulation system of transformers. In this paper results of experimental investigations carried out on voltage current characteristics and insulation resistance of paper oil insulation in presence of copper sulphide are presented and discussed. A model for copper sulphide migration is proposed to explain the increase in leakage current and reduction in insulation resistance. Existence of two regions in voltagecurrent characteristics, one dependent on the insulation properties of paper oil insulation and other due to semi-conducting copper sulphide is discussed and explained.

Keywords

copper compounds; leakage currents; paper; sulphur; transformer oil; copper sulphide effect; copper sulphide migration; corrosive sulphur; insulation resistance; insulation resistance reduction; leakage current; mineral transformer oil; paper oil insulation; transformer insulation system; voltage current characteristic; Conductors; Copper; Discharges (electric); Electrodes; Oil insulation; Power transformer insulation; Breakdown voltage; copper corrosion; insulation resistance; paper insulation; power transformers;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2014.004408

Filename

7033431