NDLI: A Thermodynamic Approach to Evaluation of the Severity of Transformer Faults

Content Provider	IEEE Xplore Digital Library
Author	Jakob, F. Noble, P. Dukarm, J.J.
Copyright Year	1986
Abstract	Dissolved gas analysis (DGA) has been used to classify the type and severity of faults in transformers. The method commonly used to identify severity is to measure the total fault gas concentration and its rate of change, without regard to the relative concentrations of individual gases. Thermodynamic analysis indicates that the energy required to form gases increases in the order CH₄ <; C₂H₆ ≤ CO ≤ C₂H₄ <; H₂ ≪ C₂H₂. Based on these results, an energy-weighted dissolved gas analysis (EWDGA) is proposed, where concentrations of individual gases are multiplied by a weighting factor that is proportional to the energy required to produce each gas. Statistical calculations are used to show that EWDGA is more sensitive to high-energy faults than simple DGA, hence minimizing the damage caused by those faults.
Sponsorship	IEEE Power Engineering Society
Starting Page	554
Ending Page	559
Page Count	6
File Size	451364
File Format	PDF
ISSN	08858977
Volume Number	27
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gases Oil insulation Sensitivity Power transformers Thermodynamics Carbon Compounds IEEE DGA guide Dissolved gas analysis (DGA) energy DGA gases DGA thermodynamics fault severity faults in oil
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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