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Документ Basic bases of calculations and optimization of NPP power unit equipment parameters methods of mathematical modelling(Національний технічний університет "Харківський політехнічний інститут", 2021) Yefimov, Olexander Vyacheslavovych; Ilchenko, Boris Samuilovich; Tiutiunyk, Larysa Ivanivna; Harkusha, Tetyana Anatoliivna; Yesipenko, Tetyana Oleksiivna; Motovilnik, Anastasiia VadimovnaThe materials of the article consider the optimization of certain parameters and characteristics of the equipment of NPP power units, which are closely related to the processes of their design and construction. Modern NPP power units are complex technical systems. They include a set of interconnected equipment for different technological purposes, which ensures the performance of power units of a complex function of electricity production and heat of the specified quality and according to a given load schedule. Complete mathematical models of the functional state of steam turbine power units are characterized by a large number of nonlinear connections and contain implicit functions. This complicates their widespread use to solve problems of systematic analysis of the quality of operation of power units. The aim of the work is to analyze the basic theoretical foundations, methods and approaches to the calculation and optimization of the parameters of the equipment of NPP power units by methods of mathematical modeling. The solution of the problem of optimization of NPP power unit parameters includes the following stages: selection of optimality criteria (objective functions); development of a system of interconnected mathematical models in accordance with the required hierarchical level of optimization research; selection of computational methods and optimization algorithms. Taking into account the above methodological provisions and approaches increases the efficiency of mathematical modeling to solve problems of calculations and optimization of NPP power unit parameters.Документ Methods and approaches to simulation, diagnostics, forecasting equipment state and optimization of robot modes of NPP power units(Національний технічний університет "Харківський політехнічний інститут", 2021) Yefimov, Olexander Vyacheslavovych; Kavertsev, Valery Leonidovich; Potanina, Tetiana Volodymyrivna; Harkusha, Tetyana Anatoliivna; Tiutiunyk, Larysa Ivanivna; Motovilnik, Anastasiia VadimovnaNuclear power plants are the basis of energy in many countries of the world, which determines the pace of their economic development. At the same time, they as complex technological systems are objects of the increased technogenic danger. Therefore, ways to increase the reliability, safety and efficiency of NPP power equipment have already been developed and continue to be developed, which are largely based on diagnostic procedures. During the operation of power equipment, especially during its long period, its technical characteristics, and, consequently, the parameters of technological processes, change under the influence of external factors and as a result of wear, or even destruction, of individual structural elements. Changing the characteristics of the equipment usually leads to a decrease in the level of adequacy and to the loss of conformity of mathematical expressions in the models of the content of the processes described by them.The materials of the article consider the identification of mathematical models of NPP power unit equipment in the process of parametric diagnostics. Ways to increase the reliability, safety and efficiency of NPP power equipment have been developed and continue to be developed, which are largely based on diagnostic procedures. The use of the iterative process to find the values of the identified parameters can be used to identify mathematical models of technological processes in NPP power equipment, which increases the adequacy of models and the reliability of diagnostic conclusions in solving parametric diagnostic problems.