Results 11 to 20 of about 1,020 (264)
The Need for Experimental and Numerical Analyses of Thermal Ageing in Power Transformers
Energies, 2022 Most power transformers are oil-immersed transformers for which its insulation system consists of oil and cellulosic solid. The insulation liquid impregnates the solid-covering air spaces, which improves the efficiency of the insulation system.
Inmaculada Fernández
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Visual Localization of an Internal Inspection Robot for the Oil-Immersed Transformer
Journal of Robotics, 2023 Aiming at the problem that the robot is difficult to locate in the oil-immersed transformer, a visual positioning of the robot is proposed for internal inspection. First, in order to solve the problem of blur, distortion, and low contrast of the image obtained by the camera in the deteriorated and discolored transformer oil, an image enhancement ...
Yingbin Feng, Yahui Kou, Yanju Liu
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Analysis of Influence of Moisture Content Ondielectric Properties of Transformer Oil after Aging
Journal of Harbin University of Science and Technology, 2020 Transformer oil is an important liquid insulating medium in oil-immersed power transformers，which has the functions of arc extinguishing，insulation and cooling.
JIA Hai-feng +4 more
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IEEE Access, 2020 In recent decades, moisture evaluation of transformer oil-immersed cellulose insulation has been widely studied by using the frequency domain spectroscopy (FDS) technique.
Jiefeng Liu +4 more
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Sensors, 2023 Power transformers are essential apparatuses used to transfer electrical energy from one voltage-level circuit to another. For reliable systems, preventive maintenance of the transformers is required to ensure good services of all mechanical, electrical,
Anantawat Kunakorn +4 more
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Diagnosis of Oil Immersed Transformers by Colorimetry of Insulating Papers
IEEJ Transactions on Power and Energy, 1992 AbstractPower transformers have been expected to work with safety and reliability over a period of more than 30 years. The life expectancy of transformers depends upon the degree of deterioration of insulating materials, particularly conductor insulating paper.
Tsuruo Yorozuya +5 more
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Methods of Humidityanalysis in Transformer Oil
Communications, 2010 To prevent failure states of transformer, we performed different types of measurements. We made measurements of a frequency dependence of capacity of test transformer immersed in tank with transformer oil.
Miroslav Gutten, Jozef Kudelcik
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Carbon footprint of oil-immersed transformers
Transformers Magazine, 2023 Končar Distribution and Special Transformers, a company in Croatia, has recognized the importance of fighting climate change and reducing CO2 emissions. To quantify the environmental impact of their products, they have conducted carbon footprint studies based on the ISO 14067:2018 standard and used the life cycle assessment (LCA) method. The LCA covers
Kolarić, Ines, Šerkinić, Vlatka
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Increase of Static Electrification in an Aged Oil-Immersed Transformer
IEEJ Transactions on Power and Energy, 2007 AbstractIncrease of static electrification activity and discharge generation was experienced during the service operation of an aged power transformer. The transformer oil had high sulfide and sulfoxide contents and was liable to show high ECT value after aging.
Kobayashi, Takayuki +4 more
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Recovery Voltage Measurements of Oil-immersed Transformer
Transactions on Electrical and Electronic Materials, 2006 One of the methods currently being investigated as a possible non-intrusive diagnostic tool for condition monitoring of power transformer and cable is the recovery voltage measurement, which will be improving the ability to detect the content of water concentration and the ageing process in the insulation system and may thus be an indicator of ...
Ming-Hua Li +3 more
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