Факультет "Управління процесами перевезень"
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Browsing Факультет "Управління процесами перевезень" by Author "Bekh, Petro V."
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Item Asymmetric Power Supply Circuit Design for Electric Rolling Stock on the Electrified DC Rail(IEEE, 2020) Sychenko, Viktor G.; Danylov, Oleksiy; Bekh, Petro V.; Kosariev, Yevhen; Liashuk, Vitalij; Drubetskaya, TanyaENG: Modern requirements for the traction power supply system of direct current in providing the high-speed movement are reduced to the need of ensuring a normalized voltage level of 2900 V on current collectors of electric locomotives. At the same time, the power supply system has to be stable on changes in power consumption and have the necessary specific energy intensity. The purpose of the work is to explain the transition to a new circuit design of the traction network using additional generators of electric energy. The proposed asymmetrical power supply system of the electric rolling stock allows to provide the required voltage level on the electric locomotive current collectors, to reduce the range of its changes and to reduce the power losses by 14.3% compared to the symmetrical centralized power supply circuit design with passive boosting of the traction network.Item Building Models to Optimize Vehicle Downtime in Multimodal Transportation(PC TECHNOLOGY CENTER, 2023) Razghonov, Serhii; Lesnikova, Iryna; Kuznetsov, Vitalii M.; Kuzmenko, Albina; Khalipova, Nataliіa; Chernikov, Danylo; Zvonarova, Olha V.; Prokhorchenko, Halyna; Horulia, Mykola; Bekh, Petro V.ENG: Sustainable development has become the main focus of transport policy and planning around the world. One of the practical goals when performing multimodal transportation is the optimization of logistics costs. That is, the object of research is the process of multimodal transportation. Empirical research shows that the problem of optimization of transportation costs can be solved by different methods. But the result will be similar. In the given approach, only one component of the transportation process is subject to optimization, which is the overload time. The solutions are based on the method of mass service theory and the method based on fuzzy logic. With the help of these methods, based on practical data, time parameters were calculated that characterize overloading from railway transport to road transport. The application of the method of a weakly formalized process in relation to transport logistics was considered, taking into account not only quantitative estimates but also qualitative, vaguely defined criteria that do not lend themselves to formalization, and the relationships between them. The model was developed for further research of this process, prediction of its behavior, optimization of functioning. It is based on the technology of fuzzy sets. The results obtained using the agent model based on the mass service network and the model based on fuzzy logic differ within the permissible specified limits of no more than 5–7 %. The application of fuzzy logic in the logistics of multimodal transportation is relevant and gives the best results compared to traditional methods of the theory of mass service systems. The article includes comparisons that reflect the advantages of the proposed approach. The obtained results are of a practical nature and can be used to make a decision on choosing a route and/or when transferring from one mode of transport to another.Item The Concept of a Hybrid Traction Power Supply System(Les Ulis: EDP Sciences-Web of Conferences, France, 2019) Sychenko, Viktor G.; Kuznetsov, Valeriy; Kosariev, Yevhen; Bekh, Petro V.; Sayenko, Yuriy; Styslo, Bohdan O.; Pavlichenko, Mihail; Vasilev, Ihor; Pulin, Mykola M.ENG: Abstract. The growing shortage of energy resources to provide heavy traffic and high-speed traffic necessitates the development of a new power supply scheme for a traction network using sources of distributed generation of electric energy. Application of asymmetric distributed traction power system with the use of distributed generation allows to increase electric energy efficiency of the feed system of rolling stock, reduce its material capacity and increase the reliability of the functioning of the railway system as a whole. The proposed structure of the hybrid electric traction system involves the creation of a new paradigm aimed at ensuring high demands on the voltage and specific power in the traction network, which will allow to improve the quality and safety of the transportation process when increasing the energy performance indicators. This paradigm will allow to form a new philosophy of building traction power systems. The key elements of this philosophy are decentralization of generation and consumption of electric energy, the use of intelligent electric equipment, distributed power supply management in a single information space of the energy process during transportation. The peculiarity of the proposed work is the optimal combination of technological processes of transmission, consumption of electric energy and transportation, taking into account the specific conditions of functioning of the electrified section: points of connection of power sources and their type, profile of the track, schedule of trains, types of rolling stock and equipment. Conceptually, the hybrid traction power system is an electric hub, in which the inputs are generating points, and the output is the power supply system of the rolling stock. The internal structure of the electric power objects of the hub is determined by the type of transformation and accumulation of electric energy and ways of managing these objects in real time.Item Improvement of Supervisory Control of Train Movement by Means of Introduction of Operational Zones(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2018) Nesterenko, Halyna I.; Bekh, Petro V.; Muzykin, Mykhailo I.; Avramenko, Svetlana I.ENG: Purpose. The work is aimed to investigate the feasibility of transferring automatic control to low-density stations of the sections (according to the principle of supervisory control of train line) to the operators at principal stations. Methodology. The article analyzes the work of heavy traffic sections of the Ukrainian Railways JSC. It was found out that the information workload of dispatchers who control the train movement at the sections of the main course, constantly exceeds the permissible level. The possibility of using the technology of supervisory control of train movement by the introduction of operational zones has been investigated. Findings. The authors found out that the capacity of receiving and departure tracks at the stations of the sections is extremely limited. The occupancy of passing loop by the out-of-work trains hinders any regulatory measures at the sections. Trains pass one after another without giving priority, that is, they pass through the section in the order in which they entered it. Due to the limited number of tracks at the front-line intermediate station, freight trains are set for passing by the passenger ones at the distant approaches. This leads to a loss of service speed and reduces the level of utilization of the sections` working capacity. The introduction of operational zones will significantly reduce information flows and facilitate the work of the train dispatchers at the, create the necessary conditions for creative decision-making on the internal section regulation, and will contribute to increase in the service speed of trains. Originality. The article developed a new technology to improve the management of train sections by dividing them into operational zones. In each zone, consisting of two or three passes, the train movement can be controlled by the duty officer of the principal station, performing in this case the functions of the train dispatcher. Practical value. It has been proposed to put trains from technical stations that idle due to uneven movement, especially the trains from the terminal stations (division points) of the locomotive circulation sections, to reserve routes of the front-line intermediate stations. Laying the reserve tracks and their content, taking into account the frequency of use and reduced allowable speed, can be allowed according to less tight standards for the construction of the roadbed, ballast section, sleeper density, taking into account the use of switches and decommissioned tracks.Item Optimization of Traction Power Supply System with Variation of Train Flow Sizes(Kaunas University of Technology, Kaunas, Lithuania, 2020) Kuznetsov, Valeriy; Hubskyi, Petro V.; Sychenko, Viktor G.; Kosariev, Yevhen M.; Papakhov, Oleksandr Yu.; Bekh, Petro V.ENG: Modern requirements for the operation of electrified railways are the efficient use of available technical means to ensure energy efficiency while increasing train traffic. The aim of the work is to substantiate the optimization of the structure of the DC traction power supply system with variation of train flows and traction loads. Such optimization should be performed after the reformatting of the train schedule and the subsequent impossibility of increasing the energy performance. The methodological basis for the optimization of the existing power supply system of the traction line is the use of a hybrid traction power supply system with an asymmetric arrangement of active generators.