2019
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Browsing 2019 by Subject "communication lines"
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Item Analysis of Operation of Railway Communication Systems(Дніпровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2019) Botnarevscaia, R.; Serdiuk, Tetiana M.ENG: Actuality. Technological progress, which has rapidly burst into our lives, dictates its own rules. There is a need to modernize the railway infrastructure, which, in its current equipment, built in 70-80 years of the last century, is morally and technically obsolete. Considering the huge volumes of work to be done, we come to the understanding that it is not possible to carry out such modernization in a short time, both from a financial point of view and from a technical point of view. For a long time, you will have to measure with the simultaneous operation of both new and old equipment and ensure their uninterrupted functioning. New electronic equipment introduced in various fields requires careful testing for electromagnetic compatibility. Ensuring safety in the transport of passengers and goods depends on this. So, the scientific work deals with the analysis of operation of railway communication systems are actuality. The object of research is railway communication lines. The main purpose is to evaluate the quality of different kinds of railway communication and the reasons of noise and interference in these systems. It was carried out the follows in the paper: the reasons of appearance noises in the telecommunication channels (radio and wire communications) were analyzed; the main faults in the overhead communication lines and their influence on the quality of communication were evaluated; the electromagnetic interferences in the communication lines and their frequency diapasons were researched; the further ways of investigation and simulation of influence traction and non-traction systems on the communication channels were described. The scientific novelty is in the proposition of use CST simulation to investigate electromagnetic influence of traction and non-traction power system on the communication channels with the 8-poles mathematic modelling. Research will be carried out by the method of direct measurements on existing equipment and collection of statistical data. At the end of the research, conclusions will be drawn about the electromagnetic compatibility of the of old and new equipment of communication systems, and we can say that the issue does not lose its relevance due to the introduction of new types of rolling stock, the modernization of traction substations.