IMPROVEMENT OF THE ELECTRICAL PROPERTIES OF SYNTHETIC LIQUID DIELECTRIC FOR PULSE CAPACITORS
Abstract
An increase in electricity generation is possible not only through the construction of power plants, but also through the creation of fundamentally new energy sources. One of the problems of modern electrical engineering is to ensure the reliability of the operation of capacitors at electric field strengths exceeding I50-200MV. In the domestic and foreign capacitor industry, for heavy pulse modes, castor oil (CO) is used as a liquid impregnation. The development of a method for producing a substitute for natural castor oil, which is a universal impregnating liquid in capacitors, is an urgent problem in the electrical industry. Thus, we have developed a method for the production of acetoxymethyl-w.hexyl-o-xylene, the electrophysical properties of which make it possible to use it as an environmentally friendly and promising substitute for natural castor oil. However, there was a problem of stabilization, since compounds of the ester type have (as impregnating liquids in capacitors) a disadvantage, which consists in their sensitivity to light hydrolysis and atmospheric effects. Ester exhibits high stability with respect to air up to 200 °С, therefore, inhibition by the addition of antioxidants is required is not new.
In this work developed the basic electrophysical properties of the ester-acetoxymethyl-secondary hexyl-o-xyleole; methods for its purification and stabilization. There were chosen the adsorption method of thermo-oxidative stabilization to clean dielectric fluid from conductive impurities.
As a result of the electrophysical characteristics of the acetoxymethyl-secondary hexyl-o-xyleole ester, as well as the method of its purification using alumina, and hydrogenation on a catalyst representing 0.2 % palladium on alumina and stabilization using additives NG-2246. As a result of the research, it was possible to obtain an ester with improved electrophysical parameters
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References
Perrier, C., Beroual, A. (2009). Experimental investigations on insulating liquids for power transformers: Mineral, ester, and silicone oils. IEEE Electrical Insulation Magazine, 25 (6), 6–13. doi: https://doi.org/10.1109/mei.2009.5313705
Ruder, A. M., Hein, M. J., Hopf, N. B., Waters, M. A. (2014). Mortality among 24,865 workers exposed to polychlorinated biphenyls (PCBs) in three electrical capacitor manufacturing plants: A ten-year update. International Journal of Hygiene and Environmental Health, 217 (2-3), 176–187. doi: https://doi.org/10.1016/j.ijheh.2013.04.006
Kodavanti, P. R. S. (2017). Polychlorinated Biphenyls (PCBs). Reference Module in Neuroscience and Biobehavioral Psychology. doi: https://doi.org/10.1016/b978-0-12-809324-5.03955-9
Moore, S. P. (2006). Some Considerations for New and Retrofil Applications of Natural Ester Dielectric Fluids in Medium and Large Power Transformers. 2005/2006 PES TD. doi: https://doi.org/10.1109/tdc.2006.1668447
Azis, N. (2012). Ageing Assessment of Insulation Paper with Consideration of In-Service Ageing and Natural Ester Application. Manchester, UK: The University of Manchester, 213.
Sarel, S., Tsai, L., Newman, M. S. (1956). Rates of Alkaline Hydrolysis of a Series of Primary and Secondary Alkyl Acetates. Journal of the American Chemical Society, 78 (20), 5420–5423. doi: https://doi.org/10.1021/ja01601a069
Abdullayeva, M. Y., Gasanov, A. A. (2018) About technically useful properties of esters on the base of alkylaromatic hydrocarbons. Bulletin of Science and Practice, 4 (11), 12–22. Available at: https://cyberleninka.ru/article/n/about-technically-useful-properties-of-esters-on-the-base-of-alkylaromatic-hydrocarbons
Wang, Z., Darwin, A., Martin, R. (2007). New insulation fluids: use of environmentally friendly fluids in power transformers. Proc. of CIGRE colloquium, Brugge.
Anikeeva, M. A., Korobeynikov, S. M. (2016). Study of stability against oxidation of rapeseed oil. Journal of Engineering Thermophysics, 25 (2), 236–238. doi: https://doi.org/10.1134/s1810232816020089
Peralta-Robledo, R. E., Santolalla-Vargas, C. E., Sanchez-Minero, F., Santes, V., Flores-Valle, S. O., Elizalde Solis, O. (2020). Effect of the formulation of Pd/γ-Al2O3+Pd/H-ZSM-5 catalysts prepared by mechanical mixing for the thermal and catalytic hydrotreating of castor oil. Catalysis Today, 346, 81–86. doi: https://doi.org/10.1016/j.cattod.2019.02.063
Lisitsyn, A. S., Parmon, V. N., Duplyakin, V. K., Likholobov, V. A. (2006). Modern Problems and Prospects for the Development of Investigations in the Field of Preparation of Deposited Palladium Catalysts. Ross. Khim. Zh., 50 (4), 140–153.
Edenbaum, J., Reinhold, V. N. (Eds.) (1992). Plastics additives and modifiers handbook. New York, 1113.
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