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X-ray induced PD in oil/paper insulation system
1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319), 2003In this paper, the research is focused on the X-ray induced PD phenomena in power transformers and the effect of X-ray irradiation on PD in the oil, and oil/paper insulation system. In the transformer oil gaps, X-ray induced PD was found to be much more active compared to conventional PD under the same electric stress.
null Xingquan Huang +4 more
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Failure anticipation in oil-paper insulation
1984 IEEE International Conference on Eletrical Insulation, 1984Characteristics of partial discharges (pd) in oil-paper insulation models were studied. Such information is required as part of a larger project to develop apparatus to warn of an impending failure of oil-paper insulated high voltage transformers in normal service. Progressive growth of partial discharges from inception to failure of the insulation was
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Study on Moisture in Oil-Paper Insulation by Frequency Domain Spectroscopy
2011 Asia-Pacific Power and Energy Engineering Conference, 2011For estimating moisture of oil-paper insulation, the frequency domain spectroscopy measurements were used to model oil-paper insulation system. Then the dielectric spectroscopy of oil-paper insulation system was tested. And give the formula of the moisture. The influence of oil gap on the test results of oil-paper insulation response was discussed. The
Wei, Guo, Saha, Tapan Kumar
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Effects Of Moisture On Power Factor Of Oil/Paper Insulation
2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena, 2006Power factor and capacitance measurements are routinely used in the condition assessment of oil/paper insulated high voltage equipment. It is a generally accepted belief that moisture in the oil/paper insulation increases the power factor and capacitance.
K. Abdolall, A. Vandermaar
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Modeling of transient moisture equilibrium in oil-paper insulation
IEEE Transactions on Dielectrics and Electrical Insulation, 2008This paper introduces a new model for transient moisture equilibrium in oil-paper insulation, easily applicable even in a continuous way, based on Fick's second law. According to the model, the moisture concentration in paper follows step response function, but the equilibration time constant changes with time since it depends on temperature, paper ...
L.J. Zhou, G.N. Wu, J. Liu
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Effect of Measurement Temperature of Insulation Poles Used for Assessment of Oil-paper Insulation
2018 IEEE Applied Signal Processing Conference (ASPCON), 2018Analysis of Polarization-depolarization current (PDC) data is a popular technique used for assessing condition of oil-paper insulation. Oil-paper insulation deteriorates with aging during the operational life of the power equipment. In order to get information regarding the insulation condition; different performance parameters are used which can be ...
R. Verma +3 more
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Probing and Modulation of the Electric Double Layer at the Insulating Oil–Paper Interface
Langmuir, 2023Charge accumulation in the insulating oil-paper system determines the operating safety of the converter transformers in high-voltage direct current (HVDC) transmissions. However, it has been a long-standing challenge to reveal the charge distribution of the electric double layer (EDL) at the insulating oil-paper interface and relate it to charge ...
Lu Gao +4 more
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Concentration of total sugar produced by insulating paper in oil-paper insulation system
IEEE Transactions on Dielectrics and Electrical Insulation, 2019As sugar is an important intermediate in the early stage in the degradation of cellulose, this paper proposes to use the concentration of total sugar as an indicator of the degree of aging of insulating paper in an oil-paper insulation system. The oil-paper insulation system was simulated at 90, 100 and 110°C, and total sugar concentration in ...
Chen Chen +3 more
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Influence of oil type on the oil-paper insulation properties
2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, 2007The behavior of the oil-paper insulating systems of transformers is primary determined by paper and oil basic properties. Recent studies are concerned to study of using synthetic oils instead of traditionally used petroleum based oils. This study monitors the influence of oil type on the final insulating system properties.
P. Prosr +3 more
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Influence of moisture and oxygen on aging of oil-paper insulation
2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2013To research the influence mechanism of moisture and oxygen on the aging process of oil-paper insulation, accelerated thermal aging experiment which the mineral oil-paper samples with different moisture and oxygen contents were thermally aged under different temperature has been designed.
Yantao Li +4 more
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