Transformer diagnostics using dissolved gas analysis and polarisation and depolarisation current measurements — A case study

Author

Jadav, Raj B. ; Saha, Tapan K. ; Ekanayake, Chandima

Author_Institution

Sch. of ITEE, Univ. of Queensland, Brisbane, QLD, Australia

fYear

2011

fDate

25-28 Sept. 2011

Firstpage

1

Lastpage

6

Abstract

This paper presents analysis of the measurements carried out on three distribution substation transformers. Dissolved Gas Analysis (DGA) and Polarisation/Depolarization Current (PDC) measurements were carried out on three transformers. DGA analysis is carried out using Ratio methods and Duval´s triangle. In addition, furan and moisture analysis are done from the oil samples. Then, PDC results of the same transformers are used to calculate paper/oil conductivity. Furthermore a discussion on the results of DGA and PDC measurements is presented.

Keywords

electric current measurement; power transformers; substations; DGA analysis; Duval´s triangle; depolarisation current measurements; dissolved gas analysis; distribution substation transformers; moisture analysis; paper-oil conductivity; polarisation current measurements; polarisation-depolarization current measurements; transformer diagnostics; Current measurement; Discharges; Gases; Oil insulation; Partial discharges; Power transformer insulation; DGA; Furan; Gas-in-Oil; Moisture; PDC; Paper conductivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Universities Power Engineering Conference (AUPEC), 2011 21st Australasian

Conference_Location

Brisbane, QLD

Print_ISBN

978-1-4577-1793-2

Type

conf

Filename

6102517