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Use of vegetable oils as transformer oils – a review
Renewable and Sustainable Energy Reviews, 2015Abstract The mineral or synthetic oil is mostly being used in conjunction with paper as the dielectric medium in most of the high voltage equipment. However, impact on environment, lack of petroleum oil reserves and disposal problems with used oils, have prompted researchers to direct their focus onto biodegradable and renewable insulating materials.
M. Rafiq +6 more
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Conference Record of the 2000 IEEE International Symposium on Electrical Insulation (Cat. No.00CH37075), 2002
Transformer oil is expected to function as an insulating medium and heat transfer agent. The behavior of oil can be related to its molecular composition and physical properties. The electrical properties and thermal behavior are the fundamental requirements of transformer oil. Oxidation is the primary cause of the degradation of the oil. The insulating
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Transformer oil is expected to function as an insulating medium and heat transfer agent. The behavior of oil can be related to its molecular composition and physical properties. The electrical properties and thermal behavior are the fundamental requirements of transformer oil. Oxidation is the primary cause of the degradation of the oil. The insulating
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Transformation of oil droplets into giant vesicles
Chemical Communications, 2016We propose a protocell model in which compartments are constructed via a new process involving the formation of robust vesicles using an autocatalytic, self-reproducing oil droplet system as a ‘scaffold’.
Li, Sheng, Kensuke, Kurihara
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Biocorrosion in transformer oils
Tribology International, 1989Abstract The acid value, surface tension, pH value of aqueous extract and oil colour were measured in non-inhibited transformer oils aged by microbiol and thermooxidation effects. It is found that considerable microbial degradation of transformer oil occurs when free water is present in the oil.
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2012 IEEE International Symposium on Electrical Insulation, 2012
The electric performance of the one kind of hydrogenated transformer oil and three kinds of naphthenic transformer oil had been tested by using the experimental methods specified in the GB/T7595-2008. A series of experiments, including dielectric dissipation factor, volume resistivity, dielectric constant, breakdown voltage and electrostatic charging ...
Yihua Qian +4 more
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The electric performance of the one kind of hydrogenated transformer oil and three kinds of naphthenic transformer oil had been tested by using the experimental methods specified in the GB/T7595-2008. A series of experiments, including dielectric dissipation factor, volume resistivity, dielectric constant, breakdown voltage and electrostatic charging ...
Yihua Qian +4 more
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Dielectric response of transformer insulation oils
2012 10th International Power & Energy Conference (IPEC), 2012Dielectric diagnosis with polarization and depolarization currents (PDC) which employs the dielectric response of system in time domain is applied to investigate differences between PDC patterns produced by two types of transformer insulating fluids, mineral and bio-degradable oil.
M. Shareghi +3 more
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Emergency Overloads for Oil-Insulated Transformers
Transactions of the American Institute of Electrical Engineers, 1942IN periods of high industrial activity transformer loads are generally high, and it is essential that operators know what overloads they can carry safely in emergencies. In order to do this effectively, it is necessary to know what temperatures will be reached after various overloads for different durations of time and the effects of temperature and ...
F. J. Vogel, T. K. Sloat
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Testing, evaluation and standardisation of transformer oils
IEEE International Conference on Dielectric Liquids, 2005. ICDL 2005., 2005A number of activities within the IEC on the standardization on transformer insulating oils are discussed. Among these, it is of great importance the present recent (2003) of the standard IEC 60296 that introduces only one class of mineral oil to be employed in transformers with a reduced viscosity.
POMPILI, Massimo +2 more
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Corona measurements on oil-insulated transformers
Electrical Engineering, 1957A description is given of a technique recently devised which permits the accurate determination of corona. With proper discrimination between external corona in air and internal corona in voids and corners under oil, quantitative measurements may be made on oil-insulated transformers.
E. J. Adolphson, F. J. Vogel
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Electrostatic Charging Tendency of Transformer Oils
IEEE Power Engineering Review, 1984Three different comnercially avaiTable transformer oils were evaluated for their electrostatic charging behavior. One of these oils was found to have a higher charging tendency than the others. The charging behavior of this oil was moisture dependent; drying of the oil raised the charging level while addition of moisture lowered it. All the oils showed
T. Oommen, E. Petrie
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