Domanskyi I. Theoretical bases of energy efficiency and resource conservation of traction and external power supply systems of railways

he dissertation is devoted to solving the scientific applied problems of the devel-opment of theoretical bases of energy efficiency and resource saving of systems traction and external power supply railways. Scientific principles of power strategy and method of determination of potential of energy-savings of railways are developed. The rational ratios of use of electric and diesel traction are proposed. Determined specific costs of energy re-sources for the perspective up to 2020. In the work the general methodological approach of the directed choice of technology of increasing energy efficiency of traction networks and feeding lines of power systems by increasing the voltage of energy transmission to the consumer and minimizing the "medium energy path" is developed. The method of analy-sis, calculation and modeling of basic electrical parameters and indicators of powertrain networks and power lines of power systems is developed. The scientific principles of increasing the efficiency of modes in electric systems with traction loads, which are based on the multilevel voltage and reactive power regulation method and the principles of choice of type of adjustable compensation devices, are developed. It was first established that the absence of a load of the left or right shoulder of the power supply of the traction substation of the alternating current leads to the flow of active-capacitive current in one of the phases of the supply line. The system of rating assessments of the state of energy security of the process of transportation of railways has been developed. The scientifically grounded principles of the development of the technology of operation of electric systems with traction loads on the state and mechanical costs in the course of their life cycle, which solves the resource conservation problem in general, are developed. In general, the results of the work make a significant contribution to the development of modern electrical equipment for traction supply systems.