Yarymbash D. Electric power supply systems and modes of powerful technological complexes with resistance furnaces of the direct heating

The thesis is devoted to solving actual scientific and applied problems of the development of scientific and technical bases of the optimization and effective control of electric power supply of powerful technological complexes with resistance furnaces of the direct heating with alternating current. For this purpose the synthesis of complex macrostructure, based on corteges of unitary structures and generalizing energy efficiency criterion. 3-D mathematical model of electromagnetic and electro-thermal energy conversion in the electrical complex of graphitization is developed. The method of frequency adaptation for high-efficiency computer modeling with high accuracy and authenticity of the results is proposed. The identification is carried out and functional expressions for the correlation between electrical parameters and modes of operating and final complex elements as a limitation system for the definition of permissible field of optimization parameters are obtained. New approaches of multistage optimization for structural characterization, electric graphitization regimes and reactive power compensation substantially are provided. New methods of dynamic data processing are theoretically and experimentally proved, a new sensor design for control system of electrical parameters of the short network and the graphitization furnace are suggested. The reliability, adequacy and energy efficiency of optimal technical decisions for short networks of the complex and electrical regimes of its work are experimentally proved in laboratory and industrial conditions.