Факультет "Управління енергетичними процесами" (раніше "Електрифікація залізниць")

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ENG: Faculty "Railway Electrification" (Faculty "Electrification of the railways")

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2-х режимний тягово-левітаційний модуль перспективної магнітно-левітаційної транспортної системи
(Кременчуцький національний університет імені Михайла Остроградського, 2022) Плаксін, Сергій В.; Муха, Андрій Миколайович; Устименко, Дмитро Володимирович; Шкіль, Юрій В.; Голота, Олександр Олександрович; Чуприна, Єгор М.
UKR: Сучасний електрорухомий склад має можливість розвивати швидкості руху понад 500 км/год, що створює умови для конкурентної боротьби з іншими видами транспорту на малих та середніх відстанях. Такі високошвидкісні системи на базі ефекту магнітної левітації можуть використовувати електромагнітну або електродинамічну підвіску. Перша вимагає високої точності побудови шляхової структури та складної системи управління, а друга менш критична до точності побудови шляхової структури та рівня складності системи управління, але ефектний підвіс магнітоплану створюється лише на відносно високій швидкості руху. На початкових, розгінних ділянках поїзди з електродинамічним підвісом підтримуються в робочому положенні за допомогою спеціальних колісних систем, що є суттєвим недоліком. Метою досліджень є визначення можливих схемних рішень шляхового модуля, який може забезпечувати комбінований режим роботи – режим тяги та режим левітації, не тільки у сталому режимі руху, але й на ділянках розгону чи гальмування без використання опорних колісних систем. В статті представлені деякі результати розробки тягового-левітаційного модуля на базі дворежимної шляхової структури, яка може працювати зі зміною полярності (напрямку) магнітного потоку, який взаємодіє з магнітним потоком надпровідних магнітів встановлених на магнітоплані. За результатами досліджень представлені схемні та конструктивні рішення науково-обґрунтованого тягово-левітаційного модуля для магнітнолевітаційної транспортної системи типу Маглев, з можливістю отримувати левітацію магнітоплану на розгінний ділянці.
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.
Analysis and Ways for Advancing of Mathematical Model of Pulverized Coal Ignition and Combustion
(Інститут геотехнічної механіки ім. М.С. Полякова НАН України, 2022) Zhevzhyk, Oleksandr V.; Potapchuk, Iryna Yu.; Pertsevyi, Vitalii O.; Sekar, Manigandan
ENG: An analysis of mathematical models of ignition and burning of a single particle and a coal cloud is given. Models which take into account the presence of ash in particles, the influence of the ratio of the amount of coal and primary air (excess coefficient) and the size of coal particles on the ignition process are presented and analyzed. It is shown that simplifications in mathematical models in most cases lead to a loss of accuracy and therefore the results cannot be used for practical purposes. Simulation of complex air supply processes by approximation of uniformity also leads to questionable results. A significant influence on the ignition and combustion of coal particles affects the content and intensity of the release of volatile substances and the chemical reactions that occur in this case. The rate of volatiles yield is proposed to be calculated according to the Arrhenius law, and the activation energy and frequency factor are considered to be those that do not depend on the type of coal, but are determined only by the temperature of the particle. Taking into account heat transfer by radiation and a decrease in the particle diameter during combustion has a positive effect on the results obtained. According to the results, the reactivity and losses with underburning significantly depend on the initial diameter of coal particles. Most models do not take into account the change in temperature inside the particles during heating, ignition and combustion in the apparatus, but there are works that are specifically devoted to the study of temperature fields inside the particles and the influence of the particle shape on the combustion rate. Modeling showed that motion relative to the gas leads to an intensification of heat transfer between the particles and the environment, while the volatile matter yield time decreases at a high ambient gas temperature. A decrease in the rate of combustion chemical reactions is noted with an increase in the concentration of water vapor in the gaseous medium around the particle, i.e. oxygen diffusion is the limiting factor in particle combustion. The most complete and physically correct gas dynamics during combustion is calculated in models where known turbulence models are used, such as the standard k-ε model, RNG k-ε model, BSL model and SST model. At the end of the article, the concepts for improving the model of ignition and combustion of coal particles are outlined.
Analysis of Operational Characteristics of SRM in Emergency Modes of the Converter Unit
(IEEE, 2022) Vlasenko, Vladimir; Tytiuk, Valerii; Kuznetsov, Vitalii V.; Kuntush, Yelena; Chornyi, Oleksii; Busher, Victor
ENG: The paper analyzes the issues of maintaining the operability of a switched reluctance motor (SRM) in various emergency situations. The researches were carried out using simulation modeling in the Matlab environment, the developed model was used for both normal and emergency operation modes. A series of dynamic tests of the motor torque has been carried out, and the values of the electromagnetic torque pulsation coefficient have been calculated. The possibility of maintaining the operability of SRM in the event of various emergency situations in the phases of the motor has been proved. The static mechanical characteristics of the motor are built and the calculation of the droop of the mechanical characteristics for possible emergency modes is performed. © 2022 IEEE.
Analysis of the Electric Energy Consumption Components for Mine Train Traction
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Arpul, Serhii V.; Artemchuk, Viktor V.; Babyak, Mykola O.; Vasilyev, Viacheslav E.; Hetman, Hennadii K.; Marikutsa, Serhii L.
EN: Abstract. The paper considers the issues of reducing the energy intensity of transportation at opencast mining enterprises, the relevance of which has now increased due to the rise in the cost of fuel and energy resources. It presents the study results concerning the cost structure of the electricity consumed by electric mine transport, which form the basis for the development of technical and operational measures to reduce the energy intensity of the transportation process. It is shown that the work to reduce the electricity consumption for mined rock transportation should be aimed at: - Reduction of losses in the power circuits of the traction rolling stock due to the use of more advanced electric rolling stock and regulation of the degree of utilization of the installed traction power; - Introduction of new contact materials for electrical circuits with the lowest possible resistivity, including for current collector plates; - Introduction of measures to reduce energy consumption for power supply of auxiliary circuits; - Development and implementation of rational train control techniques. The introduction of energy-saving measures should include the development and application of effective methods for calculating individual norms of energy consumption and incentives for energy saving of the employees involved in the organization of the transportation process.
Anthropological Aspects of High-Tech Facilities Operation Support
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2017) Matusevych, Oleksandr O.; Matusevych, Oleksii O.
ENG: Purpose. The article, based on the analysis of actual materials, highlights the importance of taking into account the influence of the human factor in occurrence of emergency situations in terms of transport infrastructure. Methodology. The research is based on the interdisciplinary system analysis. It was comprehended how the service technicians of high-tech systems can create latent unsafe conditions that combined with other hazardous activities can cause an emergency and injury. The authors attempt to dramatize the issue in order to find a solution – on the one hand, man is the most crucial part of a complex technological system, on the other hand – he is the most unreliable part of the system, especially in terms of the extreme power of modern vehicles and their speeds. The above situation demonstrates the need for a new level of anthropic comprehension of the high-tech systems in the schematic set "human-system-environment". Originality. The paper analysed the problems and conditions of human factors that allow detecting the causes of technicians’ errors. The authors highlighted proposals for psychocorrective work among the personnel of the facilities. The problem of further development of continuous improvement of the equipment maintenance systems, based on integrated approach taking into account the human factor, is also not overlooked. Conclusion. In the course of understanding the human factor and its influence on the processes, the most urgent tasks are as follows: implementation of new system software, automation of vehicles and development of high production culture based on moral qualities of experts.
The Application of Fuel Burning Pulsating Resonance During Drying and Heating Processes of Steel-Teeming Ladles
(National Metallurgical Academy of Ukraine, Dnipro, 2016) Gichev, Yuriy A.; Hichov, Yurii O.; Stupak, Mykhailo Yu.; Pertsevoi, Vitaly A.; Matsukevich, Maksym Yu.
EN: The results of the experimental-industrial tests of the fuel burning pulsating resonance system at the posts of drying and heating of steel-teeming ladles are given in the paper. The high performance and efficiency of the system were established. Reduction of the natural gas saving was 2.7 ÷ 26.1% when ladles drying, and 19.5 ÷ 37.8% when heating.
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, Tanya
ENG: 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.
Automatied Workstation for Calculating Rational Mode of Traction Power Supply Systems
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2013) Kuznetsov, Valeriy
EN: Improving the competitiveness and efficiency of railway transport of Ukraine is impossible without solving a number of priority issues, including: providing a rational railway technology taking into account energetic, economic and environmental criteria, infrastructure development for high-speed motion, improving consumption energy planning, the implementation of effective management at all levels of the production cycle. This list very important problem is energy saving in power supply traction systems. This problem is complex, multi-level and multi-factor in nature. The definition of rational modes of traction power supply DC systems has previously been performed without taking into account the realities of our time, when there is a market economy, there are different options for electricity payment (by flat-rate tariffs, differentiated tariffs or wholesale prices for electricity). Now, the energy component in the transportation tariff has reached 20%, and taking into account global trends will continue to rise. When making decisions in firstly we need to take into account not only technical indicators, but also economic (cost of electricity consumed). The paper presents the principles of rational modes of the power supply systems. This make a basis for creation a monitoring system for ensuring the rational modes, which could for each time point evaluate the power supply system mode and propose the measures to ensure the most profitable mode. It's done the description of the specialized software that allows you to define rational modes of traction power supply system. The discussed program uses a genetic algorithm to determine the rational modes. This article contains screenshots of developed software.
Badania Rezerw Zasilania Poprzez Racjonalne Rozmieszczenie Pociagow na Odcinku
(Польша, 2013) Maksimczuk, W. F.; Kuzniecov, Walery G.; Kalasznikov, K. A.; Kiriluk, T. l.
PL: Przeprowadzono badanie czynnikow okreslajctcych wielkosc strat mocy w sieci trakcyjnej. Nastepnie okreslono zaleinosci pomiedzy wielkoscict strat mocy w sieci trakcyjnej a liczbct pocictgow i ich dyslokacjct na odcinkach miedzypodstacyjnych.
Badanie Skali Zmienności Obciążeń Wybranej Tramwajowej Podstacji Trakcyjnej na Podstawie Rzeczywistych Wyników Pomiarowych dla Spójnego Okresu Czasowego Obejmującego Szesnaście Tygodni
(Politechniki Krakowskiej im. Tadeusza Kościuszki, Kraków, Polska, 2015) Drapik, Slavomir; Kuznetsov, Valeriy; Markowski, Paweł; Prusak, Janusz; Woszczyna, Bartosz
PL: Zmienność obciążeń trakcyjnych powoduje, że projektanci muszą dobierać moc zespołów prostownikowych dla podstacji trakcyjnych DC ze znacznym przewymiarowaniem. W artykule, na podstawie wyników pomiarowych eksploatowanej tramwajowej podstacji trakcyjnej, przedstawiono skalę przewymiarowania mocy zespołów prostownikowych tej podstacji. Stwierdzono występowanie znacznych odcinków czasowych, w których moce zespołów prostownikowych nie są wykorzystywane. Obliczono współczynniki przeciążeń chwilowych dla różnych odcinków czasowych, następnie przeprowadzono ich analizę statystyczną. Zwrócono uwagę na rozwiązanie techniczne mogące w przyszłości ograniczyć straty energii w podstacjach trakcyjnych DC.
Calculation of the Traction Power Supply Systems Using the Functions of Resistance
(Instytut Kolejnictwa, Warszawa, 2015) Bosiy, Dmytro O.; Kosariev, Yevhen M.
EN: The article is devoted to the development of a new method of calculating the instantaneous traction power supply circuits of the system. On the basic of the design scheme of generalized traction substations zone provided analytical functions of the resistance. Using the known functions of the current distribution of functions putted into the concept of resistance feeders traction substations. The functions of resistance and current distribution used in a more straightforward method of calculating the instant schemes that allow to formalize electrical calculations of electrical traction power supply systems.
Calculation of the Traction Power Supply Systems Using the Functions of Resistance (preprint)
(Instytut Kolejnictwa, Warszawa, 2015) Bosiy, Dmytro O.; Kosariev, Yevhen M.
EN: The article is devoted to the development of a new method of calculating the instantaneous traction power supply circuits of the system. On the basic of the design scheme of generalized traction substations zone provided analytical functions of the resistance. Using the known functions of the current distribution of functions putted into the concept of resistance feeders traction substations. The functions of resistance and current distribution used in a more straightforward method of calculating the instant schemes that allow to formalize electrical calculations of electrical traction power supply systems.
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, Yevhen
EN: 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.
Computer Modeling of Air Pollution in Case of Dust Cloud Movement in Open Pit Mine
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Biliaieva, Viktoriia V.; Kirichenko, Pavlo S.; Berlov, Oleksandr V.; Gabrіnets, Volodymyr O.; Horiachkin, Vadym M.
ENG: Purpose. Explosions in open pits lead to the formation of dust clouds. These clouds lead to intense air pollution. An important task is the development of methods for predicting the dynamics of atmospheric air pollution during ex-plosions in open pits. The purpose of this work is development of a numerical model to predict atmosphere pollution after explosion in open mine pit. The task is to develop a numerical model that would allow for the calculation to take into account the geometrical shape of the open pit mine, the parameters of the meteorological situation (wind speed, atmosphere), the shape of the dust cloud that is formed in the open pit mine at the site of the explosion. Methodology. Mathematical modeling of dust cloud dispersion during an explosion in an open pit mine is based on the use of fundamental equations of aerodynamics and mass transfer. The airflow velocity field in the open pit mine is modeled using the Laplace equation for the velocity potential. The formation of the concentration field of dust is mod-eled on the basis of the equation of convective-diffusion dispersion of an impurity. For numerical integration of model-ing equations, difference schemes are used. The Laplace equation for the velocity potential is numerically integrated using the Richardson method. For the numerical integration of the convective-diffusion dispersion equation for an im-purity, an implicit difference splitting scheme is used. Findings. A CFD model has been developed that allows you to calculate the formation of pollution zones during the movement of a dust cloud in the open pit mine. A feature of the developed model is the speed of calculation. For practical use of the developed model, standard input information is required. Originality. In contrast to the existing models in Ukraine, the developed numerical model allows taking into account the geometrical shape of the open pit mine and the geometrical shape of the dust cloud when making predictive calculations to assess the level of air pollution caused by explosions in open pits. Practical value. The developed nu-merical model can be implemented on computers of low and medium power. For practical use of the numerical model, standard information on meteorological conditions in open pit mine is required. The numerical model can be used for environmental assessment of the effect of explosions in open pit mine on environmental pollution and work areas.
Computing and Optimization for DC Power Systems of Electric Transport
(World Scientific Publishing Europe Ltd., London, 2020) Bosyi, Dmytro O.; Sablin, Oleh I.; Kosariev, Yevhen
ENG: In the modern world, further development of society is impossible without environmentally friendly modes of transport and their effective interaction within the framework of Smart Energy and ECO-driving concepts. Written at a time of rapid development of information technologies in various fields, this book serves as a kind of bridge for the introduction of artificial intelligence into the electric transport power supply systems. The calculation models and methods proposed make it possible to choose the most efficient modern equipment for electric power supply of electric vehicles, which, as a result, saves investment costs and reduces time to make decisions for designing complex objects. Insight is also given into building and adjusting Smart Energy class equipment to achieve optimal and economical modes.
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.
Continuous Improvement of Technical Servicing and Repair System of Railway Substation on the Basis of FMEA Methodology
(Instytut Naukowo-Wydawniczy "TTS" Sp. z o.o, Radom, Poland, 2016) Matusevych, Oleksandr O.; Sychenko, Viktor H.; Białoń, Andrzej
EN: The article shows the ways of solving the problem of upgrading and efficiency of the technical servicing and repair of railway substation of electrified railways in operation. Proposed to use of FMEA methodology to continuous improvement the technical servicing and repair process of electrical equipment throughout the life cycle. By the given method, the calculation of critical violations operations of subprocess maintenance work of the supply transformer and subprocesses criticality of maintenance of power electric equipment of railway substations is carried out.
Control System Fidelity of Electric Energy
(Дніпропетровський національний університет залізничного транспорту ім. акад. В. Лазаряна, Дніпро, 2017) Chichil, A. A.; Fedorenko, A. A.; Skrypnyk, A. A.; Drubetskaya, Tanya
EN: It is difficult to install consumers with faulty accounting systems, to discover areas of distribution networks with increased technological losses, and the place of theft of electric energy. To develop a methodology that allows, with existing accounting systems, to increase the informativeness of the component of the difference of distributed and consumed energy with virtually no additional expenses and, in the presence of an automated accounting system, to refuse periodic verification of the measured measuring devices and current and voltage transformers. The system for monitoring the reliability of electrical energy accounting at transformer substations has been further developed, which breaks the task at a level and solves them in stages. The developed system allows abandoning the periodic calibration of measured accounting devices and current and voltage transformers.
Correlation Theory of Casual Processes in Electrical Power Problems for Systems of Electric Transport (preprint)
(IEEE, Lviv, 2015) Kostin, Nickolai A.; Mishchenko, Tatyana M.; Shumikhina, Lyudmila
ENG: A new method is proposed for determining the energy indices in electric transport systems, based on the correlation theory of random processes. According to this method, the components of apparent power and power factor are expressed through correlation functions and mathematical expectations of investigated traction voltages and currents. Numerical calculations of active, reactive and apparent power as well as the ratio of reactive power for a traction substation feeder show that the method possesses high accuracy: the error is less than 2%.