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Information × Registration Number 0216U000531, 0110U006685 , R & D reports Title Develop the theory of mathematical modelling of electromagnetic and electromechanical processes and fields and build on this basis new methods and tools for analysis and diagnostics of power electrical equipment popup.stage_title Head Myslovich Michail Vladimirovich, Registration Date 08-02-2016 Organization Institute of electrodinamics National academy of sciences of Ukraine popup.description2 Object of researches - electro-physical processes in the power electrical equipment. Proposed a parametric model of resistance of conductive granular media in the course of their plasma-erosive treatment that describes the phases of emergence, development and extinction of plasma channels, which, in turn, due to the dynamics of generation and recombination of free charge carriers in them. Demonstrated the principal possibility of finding the exact solution of the differential equation that describes the processes in the plasma-erosive load when describing its characteristics with parametric dependence. Proposed a non-linear parametric equivalent circuit of heterogeneous plasma-erosive load for a wide range of frequencies. Developed analytical model describing the transients in the RLC-circuit with such a load. Obtained solutions of the differential equation describing the transient processes in this circuit for cases s of non-linear dependence of the resistance layer of granules and water, which are described by hyperbolic functions of the first order, as well as for the parametric dependence of the resistance layer of granules, which is described by the sum of two exponential functions for a range of low, medium and high frequency discharge pulses. Obtained results of the distribution of sources of electromagnetic fields on the plane boundary between two media, in particular, in addition to the presence of surface current density, and also the surface charge density of the output circuit of an arbitrary spatial configuration in the presence of a strong skin effect in an electrically conductive body. Based on random linear and linear periodic random process, developed a mathematical model of vibrations of moving parts of rotary electric machines, which takes into account the periodicity of the vibration process and the influence on it of the individual sources of vibration, having different physical nature and spatial localization. On the basis of this model, developed laboratory prototype of system for vibration diagnostics, which uses as diagnostic parameters the quantitative estimates of the spectral parameters, skewness and kurtosis of vibrations. The developed system automates the process of determining of technical state of moving parts of electrical machinery, while providing a given accuracy and reliability of diagnostic results. Developed the basic principles and practical application of remote multifunctional systems for environmental monitoring in the area of thermal and nuclear power stations using unmanned aerial vehicles. A study has been carried out of the main factors influencing the electromagnetic and thermal processes in power transformers tanks lids. It is shown the reliability of the developed analytical methods and numerical simulation procedures of the magnetic field, eddy current losses and heating of transformers tanks, arising under the influence of the currents of the windings, bushings and elbows. Designed the algorithms and methods of calculating the parameters of the electromagnetic field and the losses in the details of construction of computational models of transformer units made from non-magnetic and ferromagnetic steel. The developed techniques and procedures verified on test experimental and calculated data of well-known test problems TEAM21. Practical calculations of transformers and reactors show that the developed procedures provide the necessary accuracy of the calculations of local and total losses in structural elements, their heating, and also can be used to calculate the total additional losses in the structure. Product Description popup.authors Бабак Сергій Віталійович Васецький Юрій Макарович Гижко Юрій Іванович Деменчук Джон Никифорович Дзюба Константин Константинович Зварич Валерій Миколайович Кокошин Станіслав Семенович Мазуренко Ірина Леонідівна Мислович Михайло Володимирович Остапчук Людвіга Борисівна Сисак Роман Михайлович Твердяков Вадим Володимирович Хімюк Іван Васильович Черкаський Олександр Павлович Шидловська Наталія Анатоліївна popup.nrat_date 2020-04-02 Close