Mironov D. Increase of efficiency of operation of equipment of traction substations of electrified railways of direct current.

The dissertation is devoted to the problem of increasing the efficiency of technical maintenance and repair of equipment of traction substations of electrified DC railways. The work analyzes the technical state of electrical power devices of electrified railways. The basic reasons of electric equipment failures are revealed. The analysis of the current state of the system of maintenance and repair of traction substation equipment is carried out. The analysis shows that the existing system became inadequate to the economic conditions of the functioning of the traction power supply system and the operation of the power equipment of the electrified railways and contradicted the market mechanisms of the production and economic activity of the objects of the power supply Ukrzaliznytsia. At the present stage of the development of the railways of Ukraine, the improvement of the system of maintenance and repair of electric equipment TR becomes one of the main tasks of increasing the reliability of traction power supply and solving the problem of reducing the costs of maintenance and repair. The structural and functional analysis of the process of electrical equipment diagnostics has been carried out, and a structural-functional model of the process has been developed. To unify the information obtained as a result of repair and maintenance work, a generalized indicator of the technical condition of the electrical equipment was developed. It is proved that the use of mathematical methods in the theory of experimental planning makes it possible to construct a mathematical model for changing the generalized indicator of a technical state with a sufficiently high accuracy of obtaining the initial result (for different types of power equipment of traction substations, the value varies from 0.002254 to 0.002978). The approach to priority planning of repair and preventive works is proposed on the basis of an estimation of the actual residual life of electrical equipment using generalized indicators of technical condition, it allows to establish the sequence of repair and preventive works for a park of the same type of equipment. On the basis of the methodology for estimating the actual residual life of electrical equipment, an automated system for continuous monitoring and calculation of the actual residual resource has been developed that allows to react quickly to changes in the technical condition of the monitored equipment and to allocate the most critical units of technical equipment. A software package for monitoring the technical condition of the electrical equipment of traction substations has been developed, which makes it possible to quickly evaluate the results of the Measurement and flexibly schedule the repair schedule, while reducing the time for analyzing the diagnostic results and diagnosing at 700 h per year within a single power supply distance.