Title :
Estimation of water content in power transformers in service by polarization and depolarization current measurements
Author :
Gradnik, Tim ; Babuder, Maks ; Koncan-Gradnik, Maja
Author_Institution :
Elektroinstitut Milan Vidmar, Ljubljana
fDate :
June 30 2008-July 3 2008
Abstract :
This paper focuses on the comparative analysis of two different methods for water content estimation in power transformers. The first method under study is the Karl-Fisher coulometric method that measures the water content in oil and correlates it to the water content in paper. Use of four well known correlation curves is compared and discussed in the paper.
Keywords :
insulating materials; power transformers; Karl-Fisher coulometric method; PDC humidity; current measurements; depolarization current; oil temperature; polarization current; power transformers; water content estimation; Aging; Current measurement; IEC standards; Oil insulation; Petroleum; Polarization; Power transformer insulation; Power transformers; Temperature; Testing;
Conference_Titel :
Dielectric Liquids, 2008. ICDL 2008. IEEE International Conference on
Conference_Location :
Futuroscope-Chasseneuil
Print_ISBN :
978-1-4244-1585-4
Electronic_ISBN :
978-1-4244-1586-1
DOI :
10.1109/ICDL.2008.4622449
