Кафедра "Електрорухомий склад залізниць"
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ENG: The department of Electro of Railways
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Browsing Кафедра "Електрорухомий склад залізниць" by Author "Drubetskiy, Anton Ye."
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Item Energy Efficiency Determination of Loading-Back System of Electric Traction Machines(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2014) Afanasov, Andriy M.; Drubetskiy, Anton Ye.; Arpul, Serhii V.; Khvorostyankina, А. P.EN: Purpose. Acceptance post-repair tests of electric traction machines are conducted on loading-back stands that reduce the overall power costs for the tests. Currently a number of possible circuit designs of loading-back systems of electric machines are known, but there is no method of determining their energy efficiency. This in turn makes difficult the choice of rational options. The purpose of the article is the development of the corresponding methodology to make easier this process. Methodology. Expressions for determining the energy efficiency of a stand for testing of electric traction machines were obtained using the generalized scheme analysis of energy transformations in the loading-back systems of universal structure. Findings. The technique was offered and the analytical expressions for determining the energy efficiency of loading-back systems of electric traction machines were obtained. Energy efficiency coefficient of loading-back system is proposed to consider as the ratio of the total action energy of the mechanical and electromotive forces, providing anchors rotation and flow of currents in electric machines, which are being tested, to the total energy, consumed during the test from the external network. Originality. The concept was introduced and the analytical determination method of the energy efficiency of loading-back system in electric traction machines was offered. It differs by efficiency availability of power sources and converters, as well as energy efficiency factors of indirect methods of loss compensation. Practical value. The proposed technique of energy efficiency estimation of a loading-back system can be used in solving the problem of rational options choice of schematics stands decisions for electric traction machines acceptance tests of main line and industrial transport.Item Studying of the Power Modes in the Traction Line for Ensuring the High-Speed Traffic(SPC PC «Technology Center», Kharkiv, 2018) Hubskyi, Petro V.; Kuznetsov, Valeriy; Drubetskiy, Anton Ye.; Afanasov, Andriy M.; Pulin, Mykola M.EN: The object of research is the power regimes in traction power systems for both centralized and distributed power when introducing high-speed traffic. The introduction of high-speed traffic on electrified railways of Ukraine has begun a number of restrictions in the applied system of traction power supply of centralized power supply. These include not only the impossibility of providing the necessary voltage level of 2.9 kV, but also the low efficiency of the aggregate power of traction substations. In this case, the applied traction power system does not allow to provide the necessary level of specific power in the traction network. Applicable technical means and measures to strengthen the traction network do not allow, in most cases, to provide regulatory requirements for the organization of highspeed traffic. An analysis of modern research shows that overcoming these disadvantages is possible due to the application of a distributed power supply system to the traction network. To date, sufficient options have been developed for constructing such systems, but in this paper, as an alternative, a system was considered with the distribution of the aggregate power available in the system of centralized power in the inter-substation zone. At the same time it was reasonable to reduce the power of the traction substation to the level of 10 MW. During the study of power regimes in comparable traction power systems, the results of experimental studies and simulation modeling of the operating modes of the comparable systems were used. Calculations were taken into account not only the specifics of the traction load, but also its impact on the load capacity of the contact suspension. As a result of this approach, it has been shown that the distributed traction power system allows to fulfill the regulatory requirements for providing high-speed traffic. With its application, the consumption of electric energy for traction of trains is reduced by 40 %, the specific power of traction network increases by 90 %, and the load factor of traction substations – by 60 %. The proposed innovative approach to providing the necessary power mode in the traction line for the organization of high-speed traffic allows to preserve the existing infrastructure on existing electrified section of direct current. This approach allows the application of various types of electric rolling stock and provides the required capacity of the railways.