Results 21 to 30 of about 6,484 (263)
IET Science, Measurement & Technology, 2022 The main insulation structure of the valve‐side winding of converter transformer bears the effect of AC and DC superimposed voltage during operation.
Lijun Yang +3 more
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Dielectric Response of the Oil-Paper Insulation System in Nanofluid-Based Transformers [PDF]
IEEE Access, 2021 The interest in developing and testing dielectric nanofluids for electrotechnical purposes has increased significantly in the last ten years. A number of works have been published reporting dielectric and thermal properties for these liquids that enhance those of conventional insulating fluids.
Daniel Pérez-Rosa +2 more
openaire +2 more sources
High Voltage, 2021 The low‐frequency polarisation information of oil‐paper insulation could be easily obscured by the conductance effect, and the contained polarisation information thus can not be readily extracted from the frequency domain spectroscopy (FDS).
Jiefeng Liu +4 more
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Inversion of Oil-Immersed Paper Resistivity in Transformer Based on Dielectric Loss Factor
IEEE Access, 2019 The aging of the transformer oil-paper insulation distributes spatially, which results in changes in paper resistivity in different regions. This paper establishes an iterative inversion algorithm using the finite element method to calculate the oil ...
Jiangjun Ruan +5 more
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Progress of Space Charge Research on Oil-Paper Insulation Using Pulsed Electroacoustic Techniques
Energies, 2016 This paper focuses on the space charge behavior in oil-paper insulation systems used in power transformers. It begins with the importance of understanding the space charge behavior in oil-paper insulation systems, followed by the introduction of the ...
Chao Tang +5 more
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Space Charge Transport Characteristic Considering the Non-Uniform Electric Effect of Ion Mobility
IEEE Access, 2020 Oil-paper insulation is the main insulating medium of converter transformers. Space charge can result in the distortion of electric field in oil-paper insulation, hence it's necessary to analyze the space charge transport characteristic and its influence
Zhaoxiang Zhang +5 more
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Influence of Ester Liquids on Dielectric Strength of Cellulose Kraft Paper
Energies, 2022 Generally, impregnation of solid insulation is performed to increase the dielectric strength and reduce the dielectric losses of solid insulants. This increase in dielectric strength depends on the oil’s diffusion and dielectric properties.
Gottapu Tirupati Naidu +2 more
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EnergiesOil–paper insulation is the critical insulation element in the modern power system. Under a harsh operating environment, oil–paper insulation will deteriorate gradually, resulting in electrical accidents. Thus, it is important to evaluate and monitor the
Zaijun Jiang +6 more
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Energies, 2016 The aging of oil-paper insulation in power transformers may cause serious power failures. Thus, effective monitoring of the condition of the transformer insulation is the key to prevent major accidents.
Jingxin Zou +4 more
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Life cycle of transformer oil [PDF]
Hemijska Industrija, 2008 The consumption of electric power is constantly increasing due to industrialization and population growth. This results in much more severe operating conditions of transformers, the most important electrical devices that make integral parts of power ...
Đurđević Ksenija R. +2 more
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