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Morphological and Compositional Evolution of Oxidative Coke Deposits Layers Generated by Aviation Kerosene. [PDF]
MoleculesPei X, Zou S, Zhang K, Zhou Z, Hou L.
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Comparison of dissolved gas-in-oil analysis methods using a dissolved gas-in-oil standard
IEEE Electrical Insulation Magazine, 2011Dissolved gas analysis (DGA) is routinely used to determine the concentrations of gases dissolved in the insulating oil of transformers. These concentrations are used to investigate and diagnose electrical or thermal faults [1]. Such faults cause the transformer oil, pressboard, and other insulating materials to de compose and generate gases, some of ...
Daniel Martin
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A review of dissolved gas analysis measurement and interpretation techniques
IEEE Electrical Insulation Magazine, 2014Dissolved gas analysis (DGA) is used to assess the condition of power transformers. It uses the concentrations of various gases dissolved in the transformer oil due to decomposition of the oil and paper insulation. DGA has gained worldwide acceptance as a method for the detection of incipient faults in transformers.
Ahmed Abu-Siada, Norazhar Abu Bakar
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Analysis of Gas-Cap or Dissolved-Gas Drive Reservoirs
Society of Petroleum Engineers Journal, 1961Abstract A numerical method of solving the partial differential equations which describe the one-dimensional displacement of oil by gas has been presented. Possible extension of the method to treat multidimensional flow is discussed, and the limitations of this extension are indicated.
H.L. Stone, A.O. Garder
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2019
The collection and analysis of gases in an oil-insulated transformer were discussed as early as 1928 [1]. One of the signs of fault diagnosis in a transformer is the rapid growth of gases during a failure of an oil-filled transformer. It should be noted that these gases are dissolved in the oil. As a result, some faults could be identified by analyzing
Behrooz Vahidi, Ashkan Teymouri
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The collection and analysis of gases in an oil-insulated transformer were discussed as early as 1928 [1]. One of the signs of fault diagnosis in a transformer is the rapid growth of gases during a failure of an oil-filled transformer. It should be noted that these gases are dissolved in the oil. As a result, some faults could be identified by analyzing
Behrooz Vahidi, Ashkan Teymouri
openaire +1 more source
Rapid dissolved gas analysis by means of electrochemical gas sensors
Proceedings of 2002 IEEE 14th International Conference on Dielectric Liquids. ICDL 2002 (Cat. No.02CH37319), 2003Rapid, introductory analysis of gases dissolved in insulating oil (DGA) carried out in the field can help in effective screening of faulty transformers as well as minimising number of classical laboratory chromatographic DGA tests. It is also crucial for shortening a time gap between oil sampling and its analysis.
P. Zylka, B. Mazurek
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Dissolved-Gas Analysis for Nitrogen-Blanketed Transformers
2020 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D LA), 2020Nitrogen-blanketed transformers gradually flush out oxygen and fault gas in the course of temperature-driven headspace pressure regulation. Consequently it is possible in many such transformers for intermittent or moderate fault gas production to go unrecognized if fixed limits are used to detect abnormal gassing.
James J. Dukarm, Zachary H. Draper
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Dissolved gas analysis using evidential reasoning
IEE Proceedings - Science, Measurement and Technology, 2005A novel approach to the analysis and handling of dissolved gas analysis (DGA) data from several traditional methods, namely Roger's Ratio Method, Dornenburg's Ratio Method and the Key Gas Method, is presented. Ideas taken from fuzzy set theory are applied to 'soften' the fault decision boundaries employed by each of the three methods.
K. Spurgeon +4 more
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Dealing with Uncertainty for Dissolved Gas Analysis
2011This chapter presents three approaches to tackling uncertainties occurring in transformer condition assessment, including the ER approach, the hybrid FL and ER approach and the BN approach. Firstly, the methodology of transferring a transformer condition assessment problem into an MADM solution under an ER framework is presented.
W. H. Tang, Q. H. Wu
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