Dissolved Gas Analysis
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Lelekakis, N.; Martin, D.; Wenyu Guo; Wijaya, J. Electrical Insulation Magazine, IEEE, 2011
Dissolved 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 . Such faults cause the transformer oil, pressboard, and other insulating materials to de compose and generate gases, some of which dissolve in the oil. The results of ...
Zhu Qi; Yin Yi; Wang Qiaohua; Wang Zhihao; Li Zhe Condition Monitoring and Diagnosis (CMD), 2012 International Conference on, 2012
According to the principle of Photoacoustic Spectroscopy, HPAS-1000 Online Dissolved Gas Analysis Monitor is developed to monitor the dissolved gas in the power transformers online, which can directly extract the oil sample from the running transformer and measure the content of Hydrogen, Acetylene, Ethylene, Methane, Ethane, Carbon monoxide and Carbon dioxide dissolved in the oil sample in real time. Field ...
Fu Wan; Weigen Chen; Xiaojuan Peng; Jing Shi High Voltage Engineering and Application (ICHVE), 2012 International Conference on, 2012
Photoacoustic spectroscopy (PAS) is a highly sensitive gas analyzing method without the shortcoming of gas consumption, which can be well applied in online monitoring of dissolved gas-in-oil. The effect of gas pressure on the photoacoustic spectroscopy detection is significant. Functional relations between gas pressure and gas absorption coefficient as well as PAV signal were derived theoretically. The experimental results of ...
Suwanasri, T.; Chaidee, E.; Adsoongnoen, C. Condition Monitoring and Diagnosis, 2008. CMD 2008. International Conference on, 2008
Due to the degradation of power transformer under its normal and abnormal operating conditions, maintenance activities are vital to restore the condition. However, the preventive maintenance costs are now of primary concern. The scattering failure data are systematically recorded and analyzed to determine the critical component of power transformer. Two transformer models of rated voltage 115/22 kV and 230/115/22 kV ...
Feilhauer, W.; Handschin, E. Probabilistic Methods Applied to Power Systems, 2006. PMAPS 2006. International Conference on, 2006
Dissolved gas analysis is a well-known technique to detect incipient faults of oil-immersed electrical equipment. Interpretation is usually difficult because there is no unique relationship between the identified gases and the type of fault. On the basis of IEC standards for the interpretation of dissolved gas analyses and Dempster-Shafer's theory of evidence a method to automatically determine the correct diagnosis ...
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This guide is intended to apply to silicone-immersed transformers in which the silicone fluid was the fluid supplied when the transformer was originally manufactured. This guide also addresses the following: a) The theory of combustible gas generation in a silicone-immersed transformer; b) Recommended procedures for sampling and analysis; c) The interpretation of Gas Analysis; d) Recommended actions based on the ...
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