Shcheka V. Increasing functional safety track circuits under operating conditions of rolling stock with induction traction drive

The object of study: the electromagnetic processes in the system "track circuit - contact network - electric rolling stock" and their impact on the safety operation of track circuits. The aim of the thesis is to increase the functional safety of the track circuits in operation of rolling stock with induction traction drive through their electromagnetic compatibility with the system of the traction power supply and new types of rolling stock. The stated scientific problem was solved with the correct application of the modern mathematical apparatus. The novelty: first proposed mathematical model of power circuits ERS with ATP considering processes in a power transformer, 4q-S, inverters and windings ATP using real parameters of power switches, analytical solution of the model equations and its implementation in the package OrCAD PSpice; first developed a scientific substantiation of the proposed method of selective compensation of interference in track circuits, the essence of which is the reduction in track circuits only those noise frequencies that are in the bands work receivers track circuits; an improved mathematical model of the traction network with an active shield conductor influence on track circuits; an improved method for measuring the electromagnetic interference from the ERS during their tests. The results were used in carrying out research work in the educational process DNURT and transferred to the Fifth signaling and communication department of Odessa railway. The results of the thesis are intended for use on the railways.