Abstract
Mathematical modeling and analysis of the distribution of the electric field near closely located water microinclusions in a liquid dielectric under the transitional process of changing their shape and mutual arrangement are performed. With continuous deformation, convergence and fusion of microinclusions, a dynamic problem was solved to determine their shape and relative position at each instant of time under the action of electrical and mechanical forces. The dependence of the rates of deformation, approach and merging of inclusions (which determine the duration of the transient process upon reaching the equilibrium form of the resulting inclusion) is investigated from the initial distance of the inclusions and on the strength of the external electric field. References 16, figures 5.
References
Landau L.D., Lifshyts Е.М. Hydrodynamics, Theor. Physics, vol. VI. Moskva: Fizmatlit, 2016. 736 p. (Rus)
Landau L.D., Lifshyts Е.М. Electrodynamics of continuums, Theor. Physics, vol. VIII. Moskva: Fizmatlit, 2003. 632 p. (Rus)
Podoltsev A.D., Kucheriava I.M. Multiphysics modeling in electrical engineering. Kiev: Institut Elektrodinamiki Natsionalnoi Akademii Nauk Ukrainy, 2015. 305 p. (Rus)
Shydlovskii А.K., Shcherba A.A., Podoltsev A.D., Kucheriava I.M. Cables with polymeric insulation on ul-trahigh voltage. Кyev: Institut Elektrodinamiky Natsionalnoi Akademii Nauk Ukrainy, 2013. 352 p. (Rus)
Shcherba М.А., Podoltsev A.D. Electric field and current density distribution near water inclusions of polymer insulation of high-voltage cables in view of its nonlinear properties. Tekhnichna Elektrodynamika. 2016. No 1. Pp. 11–19. (Rus) DOI: https://doi.org/10.15407/techned2016.01.011
Burkes K.W., Makram E.B., Hadidi R. Water Tree Detection in Underground Cables Using Time Domain Reflectometry. IEEE Power and Energy Technology Systems Journal. 2015. Vol. 2(2). Pp. 53–62.
Comsol Multiphysics, https: //www.comsol.com/., Comsol Inc., Burlington, MA, USA, 2017.
Kurihara T., Okamoto T., Kim M.H. Measurement of residual charge using pulse voltages for water tree degraded XLPE cables diagnosis. IEEE Trans. on DEI. 2014. No 21(1). Pp. 321–330.
Olsson E., Kreiss G. A Conservative Level Set Method for Two Phase Flow. J. Comput. Phys. 2005. Vol. 210. Pp. 225–246.
Saniyyati C.N., Arief Y.Z., Ahmad M.H., Piah M.A.M. Investigation on propensity difference of water tree occurrences in polymeric insulating materials. IEEE Intern. Conf. on Power Engineering and Optimization, Langkawi Island (Malaysia). March, 2014. Pp. 413–417.
Shcherba M.A. Multiphysical processes during electric field disturbance in solid dielectric near water micro-inclusions connected by conductive channels. IEEE Intern. Conf. on Intelligent Energy and Power Systems, Kyiv (Ukraine). June, 2016. – Pp. 1–5.
Shcherba M.A., Zolotarev V.M., Belyanin R.V. The comparison of electric field perturbations by water in-clusions in linear and nonlinear XLPE insulation. IEEE Intern. Conf. on Computational Problems of Electrical Engi-neering, Lviv (Ukraine). September, 2015. Pp. 188–191.

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright (c) 2022 Array