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Highly sensitive Raman system for dissolved gas analysis in water
Applied Optics, 2016The detection of dissolved gases in seawater plays an important role in ocean observation and exploration. As a potential technique for oceanic applications, Raman spectroscopy has already proved its advantages in the simultaneous detection of multiple species during previous deep-sea explorations.
Dewang, Yang +5 more
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Dissolved gas analysis of alternative fluids for power transformers
IEEE Electrical Insulation Magazine, 2007In order to detect incipient faults in mineral oil-filled transformers, dissolved gas analysis (DGA) is used. Meanwhile, there are alternative fluids that can be used such as ester-based transformer fluids that demand more precise dissolved gas measurements and modified or new ration criteria to allow fault detection and diagnosis. In order to find out
Khan, Imad Ullah +3 more
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Dissolved gas analysis investigations on ester liquids after breakdown
2011 IEEE International Conference on Dielectric Liquids, 2011To offer more personal safety and a better environmental behavior of electrical power supply, the usage of alternative insulation fluids is demanded in large power transformers. The minimizing of fire loads is another significant reason for these new liquids.
R. Eberhardt +6 more
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New techniques for dissolved gas-in-oil analysis
IEEE Electrical Insulation Magazine, 2003Dissolved gas analysis (DGA) is one of the major maintenance tools for monitoring faults in high-voltage electrical equipment in service. An increasing number of oil samples are analyzed for DGA in laboratories. This paper, a report of CIGRE Task Force 15-01-07, evaluates several newly developed techniques to extract gas from oils.
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Dissolved gas analysis: It can save your transformer
IEEE Electrical Insulation Magazine, 1989The use of dissolved gas analysis (DGA) to monitor the in-service behavior of transformers is discussed. Sampling techniques are briefly considered, and two commercial hydrogen-in-oil detectors are described. The first allows the hydrogen concentration to be measured at intervals of a few hours by a portable gas collector that can be connected to ...
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Dissolved gas analysis of transformers using fuzzy logic approach
European Transactions on Electrical Power, 2009AbstractThe power transformer is a major apparatus in a power system, and its correct functioning is vital to system operations. Failure of one power transformer may cause long interruptions in supply, costly repairs and loss revenue. The analysis of oil‐immersed gases as a useful and effective method can prevent main faults through diagnosing internal
J. Aghaei +3 more
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Understanding Dissolved Gas Analysis (DGA) techniques and interpretations
2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D), 2016The use of Dissolved Gas Analysis (DGA) as a method for determining the types of pending or occurring faults within power transformers has been in practice for many years. It has been proven that the generation of certain gases within a transformer is an excellent indicator that a failure is pending. DGA techniques have become so sensitive and accurate
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Fault Classification for Dissolved Gas Analysis Using Genetic Programming
2011This chapter presents an intelligent fault classification approach to transformer DGA for dealing with highly versatile or noise-corrupted data. Two methods, i.e. bootstrap and GP, are employed to preprocess gas data and extract fault features for DGA, respectively.
W. H. Tang, Q. H. Wu
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Algorithm for single interpretation of dissolved gas analysis
2022 IEEE 4th International Conference on Dielectrics (ICD), 2022Matias Meira +3 more
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Classification of the Power Transformers using Dissolved Gas Analysis
2010Least squares support vector machines (LS-SVM), artificial neural networks (ANN) and the traditional methods based in the dissolved gas analysis were employed for the detection of incipient faults in power transformers. The diagnosis criteria’s commonly used for dissolved gas analysis (DGA) in transformer insulating oil are Doernenburg Ratio Method ...
T. C. B. N. Assunção +2 more
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