NDLI: On-line diagnostics of oil-filled transformers

Content Provider	IEEE Xplore Digital Library
Author	Varl, A.
Copyright Year	2002
Description	Author affiliation: Milan Vidmar Electr. Power Res. Inst., Ljubljana, Slovenia (Varl, A.)
Abstract	This paper deals with gas chromatographic diagnostics of power transformers which has been recognised in the world for some time-and in Slovenia for the past 15 years-as the most efficient physical-chemical on-line diagnostic method for determination of potential thermal or electrical faults in transformers. Today the method is increasingly complemented by sensor on-line monitoring of transformers. We have studied the correlations between signals of hydrogen sensor known as Hydran and the results of periodic DGA in the case of a power transformer with a built-in Hydran sensor in order to determine the applied value of sensor on-line monitoring. On the basis of the results of the investigation and the experience of Slovene and foreign researchers, we estimate that technologically and economically it is necessary to perform an annual DGA for optimal monitoring of power transformers. However, in the case of very important or problematic transformers, such an approach should be complemented by a Hydran sensor.
Sponsorship	IEEE - Dielectrics & Electr. Insulation Soc
Starting Page	253
Ending Page	257
File Size	450356
Page Count	5
File Format	PDF
ISBN	0780373502
DOI	10.1109/ICDL.2002.1022741
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-07-12
Publisher Place	Austria
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gases Power transformers Dissolved gas analysis Monitoring Performance analysis Petroleum Oil insulation IEC standards Fault detection Hydrogen
Content Type	Text
Resource Type	Article

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