Title :
Changes in levels of dissolved gas in normally operating generator transformers, the effect of a nitrogen breathing system and the effects on interpretation of dissolved gas analysis
Author :
Woolley, T. ; Fetherston, F. ; Frost, D.
Author_Institution :
Bayswater Power Station, Pacific Power, Muswellbrook, NSW, Australia
Abstract :
DGA (dissolved gas analysis) results in a normally operating transformer are shown to be related to the operating condition of the transformer. It is concluded that the dissolved gas generation rates and gas loss from the free breathing conservator is significant. The generation rate of dissolved gases can be reduced dramatically by removing the oxygen from the oil. A method of using a continuous nitrogen purge to deoxygenate and dry the oil is described
Keywords :
chemical analysis; chemical variables measurement; drying; insulation testing; nitrogen; power transformer insulation; power transformer testing; transformer oil; continuous nitrogen purge; dissolved gas analysis; dissolved gas generation rates; free breathing conservator; gas loss; nitrogen breathing system; normally operating generator transformers; oil deoxygenation; oil drying; operating condition; transformer oil; Australia; Dissolved gas analysis; Gases; History; Monitoring; Nitrogen; Petroleum; Power generation; Refrigerants; Transformers;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1994., Proceedings of the 4th International Conference on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
0-7803-1307-0
DOI :
10.1109/ICPADM.1994.414158
