Khvorost M. The development of scientific bases of systems of undergrounds electric traction.

Object of research: electromagnetic and electric processes in the electric traction system of underground. The purpose of the study: Development of scientific bases of electric traction to enhance the effectiveness of subways through the development and implementation of methods and measures for energy conservation on the basis of optimizing the parameters of the subsystems of power supply and traction electric cars. Methods of investigation: theory of electric traction, the theory of transformational technology for analytical determination of the parameters of electrical elements, the theory of active and passive filters, the theory of automated electric for the study phase and two-phase traction motors of cars with soft-switching semiconductor keys autonomous voltage inverters, the theory of traction power supply, mathematical analysis and simulation for analysis and synthesis parameters of the elements of "converter - induction motor" as well as numerical methods. Theoretical and practical results: development of methods for calculating the parameters and specifications for the basic elements of the electric traction system of subway with a longitudinal high-voltage direct current line. The practical value confirmed by acts of implementing the results of the thesis in public corporation "Harkovmetroproekt" (Kharkov) in the utility enterprise "Kharkov underground" (Kharkov) in the public corporation "Kryukov Car Building Works" (Kremenchug), in the Kharkov national academy of municipal economy (Kharkov). Novelty: scientific and technical problem - energy saving in the operation of subway by improving the electric traction system of subway which takes into account the need to move to split the traction power supply with a longitudinal line of high-voltage DC power supply and train a mixed structure are formed from the cars with traction induction motors and motorized cars that can significantly improve energy efficiency and reliability of the electric traction system underground are solved. Degree of implementation: results of the thesis introduced in the public corporation "Harkovmetroproekt" for research to develop new projects of underground food items, the utility enterprise "Kharkov underground", in the public corporation "Kryukov Car Building Works" by developing new models of cars, in the Kharkov national academy of municipal economy and in the educational process. Area of use: electrical transport.