Jasim A. Providing the matched load operation mode for photovoltaic power plants of nanosatellite

Object - processes of transformation, transportation and distribution of energy in asolar photovoltaic power plant of nanosatellite; goal - providing the matched load mode of solar power plant of nanosatellite with non-oriented multi-directional panels of photovoltaic cells under different illumination of panels by improving the method of tracking the maximum power point of photovoltaic panel with reliable identification of the global maximum of power; methods - methods of physical and mathematical modeling of electrical power characteristics and parameters of photovoltaic cells, converting DC current with PWM regulation, statistical methods for evaluating the quality of mathematical models, methods of experimental research and methods for determining the error of experimental research; results - the experimentally based mathematical model of solar photovoltaic power plant with PWM extreme power regulation, which allows to work out engineering solutions of promising power systems of nanosatellites, a complex of experimental means for modeling of the solar power plant with DC-DC converter that allows to work out engineering solutions of perspective solar photovoltaic power system of nanosatellite, is experimentally substantiated; novelty - the indirect method for maximum power point tracking of a photovoltaic panels which is operating in conditions of different illumination of panels is improved by using the power coefficient, which is the product of the open circuit voltage coefficient and the short circuit current coefficient, which provides reliable identification of the global maximum of the power of the photovoltaic panels in conditions of the presence of several local maxima and the mode of matched load of solar power system of a nanosatellite, there are have further development methods for maximum power point tracking of the solar PV system on the basis of a hybrid of direct and improved indirect methods of maximum power point tracking in the conditions of the existence of several maxima on the volt-watt characteristic of photovoltaic panels of a nanosatellite, which allows to determine definitely the position of the global maximum of power and avoid power losses that can arise when choosing one of the local maxima in comparison with the using of existing methods; the degree of implementation – the results are implemented into the educational process of the National aerospace university named after N. Ye. Zhukovsky «КАІ», implemented as part of KhAI works under the program "OsvitaKA"; field of application – aerospace.