Browsing by Author "Sychenko, Viktor G."
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Item AC/DC Converter for DC Traction Power Supply System With High-Speed Train Operation(National Technical University of Ukraine "Igor Sikorsky Kiev Polytechnic Institute", Kiev, 2019) Sokol, Yevgen; Sychenko, Viktor G.; Voitovych, Yurii; Kosariev, Yevhen M.; Styslo, Bohdan; Hubskyi, Petro V.EN: Purpose of the work is improved approaches to ensure the required quality parameters of voltage in the traction network based on modern technologies and equipment. The pulsating mode of the power consumption in the railroad power supply network is the cause of the occurrence of voltage pulsations in the contact network. The use of active rectifiers in the electric power supply system of the railroad is proposed. The control system is developed by the converter, which allows to stabilize the output voltage in the DC link and also provides the unit power factor consumed by the converter and the THD consumption current at the level of 8%. A mathematical model of the converter was developed and a study of its main modes of operation was performed.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 Comparative Tests of Contact Elements at Current Collectors in Order to Comprehensively Assess their Operational Performance(PC "Technology Center", Ukrainian State University of Railway Transport, Kharkov, Ukraine, 2018) Babyak, Mykola O.; Horobets, Volodymyr L.; Sychenko, Viktor G.; Gorobets, YevhenEN: We have studied the interaction between contact elements in the pantographs of electric transport under operation at the sections of railroads powered by direct and alternating current. In contrast to known techniques for bench tests, we investigated the mechanism of current collection and wear resistance at the new testing installation over a minimally narrow region of the sliding contact, simulating the phenomenon of a pantograph “cut”. This installation can be used both industrially when manufacturing new contact elements and under laboratory setting when studying wear resistance. The experimental research confirmed that the wear intensity of contact elements at pantographs depends on current load over a contact area, the magnitude of contact pressure, the area of a contact surface, and motion speed. We have practically proven a possibility to maintain a reliable contact connection in the sliding contact under extreme operating conditions when using a reliable contact material for the current collector pads. It has been proposed to use the powder composition BrIG based on bronze, iron, and graphite, for making contact elements for pantographs that could provide for reliable contact when interacting with the contact wire. Application of new and high-quality contact materials affects the tribology and stability of interaction between plates and the contact wire. Owing to our study, a possibility has been established to manufacture a reliable contact element BrIG, which would prolong the time of interaction in the contact pair “pantograph at electric transport ‒ contact network”. The practical significance of this research relates to the proven efficiency of utilizing the new contact material BrIG for electric railroad transport network, in trolley buses and trams. Thus, one can argue about the possibility to prolong the time of operation for the contact pair “pad in a pantograph at electric transport ‒ contact network” by applying the new contact material BrIG.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 Development a Forecasting Method of Friction Pairs Wear of the Current Collection(Wydawnictwo Instytutu Kolejnictwa, Warszawa, 2017) Antonov, Andrii V.; Bolshakov, Yu. L.; Sychenko, Viktor G.EN: Development a forecasting method of friction pairs wear of the current collection on electric rail transport.Relevance. The most costly in the operation of the electrified railway transport are maintenance and repair of contact networks and pantographs. The costs magnitude depends of the catenary type, electric rolling stock, materials of the friction pair "contact wire – contact strip" and environment parameters. For today there is no consensus regarding the choice of the pantograph contact strips type for the specific operating conditions of the electric rolling stock. Therefore, the resource elements of the friction pair inefficiently used. A solution to this problem would be to a forecasting method of friction pairs wear of the current collection. Scientific novelty. Developed a method forecasting wear of contact wires and contact strips basis on the of the neural network model. To build a neural network was used the experimental dependences and was taken into account the change pressing force of the pantograph along span of the catenary, current value, current collecting elements type and modify the parameters environment. Practical importance. The proposed method allows to estimate the wear of the contact pair without the necessity for additional bench tests. This will significantly increase the effectiveness of the design new and modernization of already-exploited contact network sections.Item Development of a Mathematical Model of the Generalized Diagnostic Indicator on the Basis of Full Factorial Experiment(Versita, Poland, 2017) Sychenko, Viktor G.; Mironov, Dmytro V.EN: Purpose. The aim of this work is to develop a mathematical model of the generalized diagnostic indicator of the technical state of traction substations electrical equipment. Methodology. The main tenets of the experiment planning theory, methods of structural-functional and multi-factor analysis, methods of mathematical and numerical modeling have been used to solve the set tasks. Results. To obtain the mathematical model of the generalized diagnostic indicator, a full factorial experiment for DC circuit breaker have been conducted. The plan of the experiment and factors affecting the change of the unit technical condition have been selected. The regression equation in variables coded values and the polynomial mathematical model of the generalized diagnostic indicator of the circuit breaker technical condition have been obtained. On the basis of regression equation analysis the character of influence of circuit breaker diagnostic indicators values on generalized diagnostic indicator changes has been defined. As a result of repeated performances of the full factorial experiment the mathematical models for other types of traction substations power equipment have been obtained. Originality. An improved theoretical approach to the construction of generalized diagnostic indicators mathematical models for main types of traction substations electric equipment with using the methods of experiments planning theory has been suggested. Practical value. The obtained polynomial mathematical models of the generalized diagnostic indicator D can be used for constructing the automated system of monitoring and forecasting of the traction substations equipment technical condition, which allows improving the performance of processing the diagnostic information and ensuring the accuracy of the diagnosis. Analysing and forecasting the electrical equipment technical condition with the using of mathematical models of generalized diagnostic indicator changes process allows constructing the optimal strategy of maintenance and repair based on the actual technical condition of the electrical equipment. This will reduce material and financial costs of maintenance and repair work as well as the equipment downtime caused by planned inspections and repair improving reliability and uptime of electrical equipment.Item Development of an Approach to Ensure Stability of the Traction Direct Current System(PC "Technology Center", Ukrainian State University of Railway Transport, Kharkov, 2018) Sychenko, Viktor G.; Kuznetsov, Valeriy; Kosariev, Yevhen M.; Hubskyi, Petro V.; Belozyorov, Vasiliy Ye.; Zaytsev, Vadym G.; Pulin, Mykola M.EN: The result of applying the quantitative approach to the calculation of static stability of the traction power system helped us establish that when a train runs along an actual section there emerge zones with lack of stability in terms of voltage. Exact solution to the task of evaluating the stability is extremely difficult because of the need to compute the nonlinear dependences determining the modes of operation of the traction power system and electric rolling stock. In this work, we constructed a system of four autonomous nonlinear differential equations based on experimental data that simulate the behavior of current and voltage in the contact network. We also calculated stability regions for voltage regulators in the traction network, which stabilize voltage at pantographs of electric rolling stock. The obtained stability regions of voltage regulators made it possible to estimate resource of stability and to find the most robust regulators out of those constructed. The study revealed that the non-linear regulator has better robust properties than the linear one. In this case, stability of the linear regulator is very narrow ‒ Δk=0.000004, which is an order of magnitude lower than for the non-linear regulator. When applying the non-linear regulator, voltage in the contact network stabilizes 3 times faster regardless of the place of its location. Application of the devised approach would make it possible to calculate the stability regions for various schematics of the traction network in the implementation of high-speed motion and to narrow the range of voltage fluctuations. The developed dynamic model of power consumption processes, as well as the voltage regulator, could be used when constructing an intelligent, adaptive traction power system for high-speed motion.Item Energy Characteristics of the DC Distributed Power Supply Systems(University of Žilina, Slovakia, 2021) Sychenko, Viktor G.; Kuznetsov, Valeriy; Rojek, Artur; Hubskyi, Petro V.; Kosariev, Yevhen M.EN: Currently the circuit technology of the DC traction power supply system cannot provide the necessary requirements for introduction of high-speed traffic. Numbers of measures and tools have been developed to improve the traction lines that no longer meet current requirements. One of the most promising means for strengthening the traction DC lines is transition to the distributed power supply of the rolling stock. In this article, a comparative analysis was carried out of energy indicators of the classic centralized power system and distributed power systems with use of one aggregate traction substation and with use of the solar generators. That comparative analysis of these systems was performed on a simulation model with the same parameters of the traction line and rolling stock.Item Increased Controllability of the Distributed Traction System in Emergency Mode(IEEE, 2020) Sychenko, Viktor G.; Antonov, Andrii V.; Liashuk, Vitalij; Rudevich, Nataliia; Belukhin, Dmitry; Danylov, Oleksiy; Kosariev, Yevhen; Bozhko, VladimirEN: The puprose of the work is to improve approaches to the controllability of power consumption in distributed power systems of electric rolling stock using modern technologies and equipment. Unequal energy consumption on the shoulders of the power supply causes additional losses in the system and makes the voltage mode worse on the current collectors of electric locomotives. To increase the controllability of operation modes, is proposed to use feeder volt-additional converters with arcless commutation of short-circuit currents. Using such converters allow to stabilize the voltage on the current collectors of electric locomotives and reduce the switching-off time. Variant calculations using the proposed circuit engineering of traction substations on the simulation model prove that the power losses from the equalizing currents are significantly reducedItem The Method for Increasing the Efficiency of Equipment's Maintenance in Railway Traction Power Supply Systems(Warsaw University of Technology, Poland, 2018) Matusevych, Oleksandr O.; Kuznetsov, Valeriy; Sychenko, Viktor G.EN: Purpose. To develop the method for increasing the efficiency of the equipment’s maintenance and repair system, ensuring necessary level of operational reliability of the equipment, safety and reliability of the electric equipment with minimal expenses on operation. Relevance. Aging of the power equipment in railway power supply systems sharply raised a need for assessment of its states and degree of risk for operation outside rated service life. In critical conditions of technological processes and operational modes of the railways it is necessary to increase the equipment’s operational reliability. The scheduled maintenance and repair system whose main technical and economic criterion is the minimum of equipment’s downtimes on the basis of a rigid regulation of repair cycles, in the conditions of market regulations in the field of repair in many cases does not provide the optimal decisions due to insufficient financing. The solution of this problem is possible by improvement of the maintenance and repair system. Under these conditions the main direction for supporting the operational reliability of power electric equipment on TS is a development of the modern methods based on individual supervision over real changes of technical condition of power equipment. Scientific novelty. In this article the authors proposed an integrated approach, on the basis of which can be developed the effective maintenance and repair system for traction power supply systems. Proposed approach allowed to react quickly to changes of service conditions on traction substations, to control the technical condition of power electric equipment under the conditions of uncertainty, to establish interrelation between quality of service and operational reliability of the equipment, to choose a service strategy on traction substations. Practical importance. The validity of the developed method was confirmed by the results of calculations and practically by choosing the optimal maintenance's option for transformer TDTN-25000/150-70 U1 (ТДТН-25000/150-70 У1) on traction power supply substation.Item Modeling the Quality of Current Collection Under the Conditions of a Growing Speed of Rolling Stock(Kaunas University of Technology, 2020) Kaniewski, M.; Kuznetsov, Valeriy; Hubskyi, Peter V.; Sychenko, Viktor G.; Antonov, Andrii V.EN: The use of high-speed electric rolling stock necessitates increased requirements for the reliability of its operation. Particular attention should be paid to the interaction of the contact line with current collectors. An important area is the development of tools for modeling the interaction of catenary with current collectors. At present, in some sections of railways, there is a need to increase the speed of trains and adapt the requirements for the design of the contact lines, which allow to the owner of the infrastructure to achieve the correct parameters for dynamic interaction on the pantograph-contact line interface in the point of view of the requirements of Energy TSI. In this work the authors discussed the problem of the equivalenting the contact line during the simulationItem A New Mathematical Model of Dynamic Processes in Direct Current Traction Power Supply System(Дніпровський національний університет ім. О. Гончара, 2019) Belozyorov, Vasiliy Ye.; Kosariev, Yevhen M.; Pulin, Mykola M.; Sychenko, Viktor G.; Zaytsev, Vadym G.EN: Abstract. A new autonomous 4D nonlinear model with two nonlinearities describing the dynamics of change of voltage and current in the contact railway electric network is offered. This model is a connection of two 2D oscillatory circuits for current and voltage in the contact electric network. In the found system for the defined values of parameters an existence of limit cycles is proved. By introduction of new variables this system can be reduced to 5D system only with one quadratic nonlinearity. The constructed model may be used for the control by voltage stability in a direct current power supply system.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.Item Resource Evaluation of Friction Pair “Contact Wire – Contact Strip”(Polish Academy of Sciences, 2017) Antonov, Andrii V.; Sychenko, Viktor G.EN: Purpose. Investigate the impact of current collection system parameters and external factors on the resource of friction pair “contact wire – contact strip”. Relevance. The level of electrified railways reliability depends on the reliability and durability of the individual objects of power supply system and the locomotive facilities, in turn, the current collection quality depends on design of contact network and pantographs, contact wires materials, contact strips and external influencing factors. The resource system “contact wire – contact strip” is an important technical and economic characteristics, and its average actual resource is much less established. It means that the actual resource does not reach the optimum value from an economic point. Increasing velocity of the electric rolling stock exacerbates the problem of improving the current collection quality, becomes an actual task of increasing the resource friction pair “ contact wire – contact strip” for mainline railways. Scientific novelty. This work determined the influence structural parameters of the friction pair, the current collection system parameters and external factors on the wear rate of the friction pair “contact wire – contact strip”. Proposed to create a predictive mathematical model that uses the dependence of the influencing parameters obtained in this work to assess the wear and resource of contact wire and contact strips. Practical importance. Developed the device for wear researching of friction pairs in laboratory conditions allows assessing the wear rate of the system “contact wire – contact strip” and their residual resource at different combinations of the friction pair and external factors. The obtained results allow us to construct a predictive mathematical model to evaluate wear rate of the elements of the friction pair “contact wire – contact strip” and identify their residual resource.Item Structural–Functional Model of Maintenance and Repair of the Traction Substations Equipment(Науково-видавничний інститут ТТС, Радом (Польща), 2017) Sychenko, Viktor G.; Mironov, Dmytro V.; Białoń, AndrzejEN: To solve the problem of improving the quality control of substation equipment maintenance and repair process the structural and functional analysis for the distances of power supply has been performed. As a linguistic support for this task the International Standards Package Modeling IDEF (Icam Definition) has been used. It allows to analyze the process from three key perspectives at the same time – IDEFO (Integrated Definition for Function Modeling), IDEF3 and DFD (Data Flow Diagram). IDEF modeling is a way to reduce the amount of costly errors by structuring the process in the early stages of creating intelligent systems. It improves the communication between users and developers and smooth the transition from analysis to design. A complex task of equipment maintenance and repair process has been divided into a series of simple tasks on the basis of IDEF modeling. Structural – functional modeling with the selection of events has been done according to the IDEF0 methodology. Description of processes has been done according to the methodology IDEFЗ. DFD method has been used for building the data flow diagrams. Conducted structural-functional analysis has been shown that at some stages this process often requires the operational definition of different types of resources needed to perform repair work.Item Theoretical and Experimental Research of Contact Wire and Pantograph Contact Elements Wear(Publishing House ‘Academperiodika’ of the N.A.S. of Ukraine, 2021) Antonov, Andrii V.; Sychenko, Viktor G.EN: The goal of the work is substantiation of using the proposed method of sliding high-current contact wear prediction by comparing the forecasting results with the experimental ones. In conditions of ensuring high quality services transportation of passengers and cargo, the issue of ensuring reliable operation of the high-current contact ‘contact wire–pantograph contact element’ becomes especially relevant. The reliability of the traction system as a whole depends of the high-current contact reliability. The feasibility of using the proposed method for predicting wear of sliding high-current contact is substantiated. This method differs from the existing ones due to possibility of taking into account the set of factors, which influence on current collection process, by comparison the predicted wear values of the sliding high current contact with the data obtained experimentally. The results show a possibility of reducing the wear of the contact wire up to 11% in its interaction with graphite contact elements and increasing the efficiency of the use of contact elements up to 25%.Item Voltage Measurement and Control System for a Distributed Traction Power Supply System(National Technical University of Ukraine "Igor Sikorsky Kiev Polytechnic Institute", Kiev, 2019) Kosariev, Yevhen M.; Sychenko, Viktor G.; Hubskyi, Petro V.; Gromova, JuliaENG: One of the problems to introduce the high-speed traffic is the need to improve the efficiency of the DC traction power supply system. The most promising method of improving this system is the transition to a distributed power supply system for traction load. During its implementation, there is a problem in measuring the voltage levels in the traction network to ensure the effective operation of the system. The article discusses the use of the sensory method for determining the voltage sensors location and checks the range of the antennas to provide redundancy of information transmission in a distributed traction power supply system.Item Voltage Quality on Traction Load Buses of DC Substations(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2013) Sychenko, Viktor G.EN: Voltage is one of the parameters of the traction power grid mode, and affects the energy performance of its functioning. Characteristics of electricity transmission networks are pulling for a change of the consumers and change their operation modes, restrictions imposed by train each other depending on their relative position, as well as limitations due to ensuring the transportation process. Voltage level at the traction substation buses and hence on the current collectors locomotives, depends not only on changes in traction load, but also from changes in load and foreign consumers district energy system, while the nature of factors that affect the voltage is nonlinear and non-stationary. At the same voltage level as an indicator of the quality of the functioning of the traction power supply system must be regarded as a parameter, which optimizes the transmission and consumption of electricity for electric rolling stock. In this regard, the regulation voltage in traction network has always been one of the most important practical tasks. To answer how to manage stress regime in the traction power supply system can be divided into three groups: local, zonal control and centralized management. Their use is intended to achieve the overall optimum. The development of modern computing technology provides the possibility of recording the parameters modes networks with more accurate and high-speed devices, and also used for data processing and rapid means of modern microprocessor and computer technology. This allows spanning more productively use the results to adjust the parameters of their operation modes. When running on energy saving measures today questions of optimal control mode voltage are of particular relevance. For optimum operation control traction networks necessary to perform analysis of their functioning in real time. One component of this process is an assessment of the law of distribution bus voltage traction substation, as one of the main parameters of the regime.