Title :
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
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;
Conference_Titel :
Universities Power Engineering Conference (AUPEC), 2011 21st Australasian
Conference_Location :
Brisbane, QLD
Print_ISBN :
978-1-4577-1793-2
