Chebotarev A. Improvement of methods for enhancing the quality of low-potential complexes of power plants by ensuring energy-efficient management

Dissertacion was executed on length 2018-2023 yy. on pulpit of the automations, the metrologies and energy-saved technology Ukrainian engineering-pedagogical academy within the framework of department of the research work FN-19-1 "Development precizion systems of the automatic regulation of the turbine installation electric station and industrial enterprise", FN-21-05 "Development algorithm and structures energy-saved automated managerial system pump installation oil- and gazissue station". In the dissertation work, further development of the solution of an important scientific and technical problem was obtained, which consists in increasing the quality indicators of low-potential complexes of thermal and nuclear power plants by ensuring effective modes of operation of their elements in all normal modes of operation. Solving this problem makes it possible to significantly increase such indicators of the quality of control systems as economy and energy efficiency by reducing energy losses in the systems of low-potential complexes and increasing the level of energy and resource conservation at power plants. The main direction of research is the improvement of methods of increasing the quality indicators of systems of low-potential complexes of power plants through energy-saving control, namely the development of scientific methods and technical solutions that can form the basis of creating energy-efficient control algorithms aimed at significantly increasing the energy efficiency of elements of systems of low-potential complexes. The process of improving the quality indicators of low-potential complexes of thermal and nuclear power plants by ensuring the energy efficiency of their operation is the object of research in the work. The subject of research is scientific methods and technical means of ensuring minimal energy losses in elements of low-potential complex systems. The purpose of research is to improve the quality of automated control systems for low-potential complexes of thermal and nuclear power plants by improving scientific methods and technical solutions that ensure minimal energy losses in the entire range of normal operating modes. Research methods are based on theoretical and experimental research methods. Theoretical methods are based on fundamental provisions of system analysis, standardization, hydrogas dynamics, modern theory of automatic control, mathematical methods of optimization. Experimental research is based on the use of modern methods of experiment planning, information and measurement complexes (measurement of electrical, hydraulic and mechanical quantities), statistical processing of data and methods of constructing empirical dependencies. Scientific novelty. As a result of the conducted research, the following scientific results were obtained: 1. For the first time, a scientific method was developed for improving the quality of the low-potential complexes of power plants, based on the minimization of energy losses with the complex use of technical diagnostics and energy-saving control 2. Mathematical models of mechanical, hydro-gas-dynamic and heat-mass exchange processes and elements of low-potential complexes, which include the integral function of energy losses, were further developed in order to evaluate and analyze possible ranges of improvement of quality indicators of low-potential complexes; 3. For the first time, a structural-parametric synthesis of energy-saving automated power plant control systems was performed, which allows to evaluate and minimize complex energy losses and increase the efficiency of power units, which are new quality indicators. Keywords: quality indicators, economy, automated control systems, low-potential complex, energy saving, condenser, steam turbine, circulation pump.