Факультет "Управління енергетичними процесами" (раніше "Електрифікація залізниць")
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ENG: Faculty "Railway Electrification" (Faculty "Electrification of the railways")
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Browsing Факультет "Управління енергетичними процесами" (раніше "Електрифікація залізниць") by Author "Arpul, Serhii V."
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Item 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.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 Energy Efficiency of Heat Tests for Traction Electric Machines(IOP Publishing, 2020) Afanasov, Andriy M.; Shapovalov, Oleksandr S.; Holik, Serhii M.; Arpul, Serhii V.; Bilukhin, Dmytro S.EN: The article discusses one of the options to reduce the electricity consumption for the carry out acceptance of post-repair tests of traction electric machines. Heating tests of traction electric machines at the mutual load stand are the most energy-intensive part of the entire test program. Energy consumption for this type of test can be reduced, for this, an analysis of thermal processes in the windings of traction electric machines during their heating test was given. The energy efficiency coefficient of the mutual load system is formulated. The energy efficiency coefficient for the traction electric machine NB-406 is calculated. The calculation results showed that with an increase in the test current by 30%, the total losses in the motor windings decrease by about one and a half times, while the test time decreases by almost three times. An increase in test current and a decrease in test time do not reduce the quality of the test, and the results obtained. A methodology for assessing the energy efficiency of heating tests is proposed. It can be applied at test sites of depots, as well as repair plants. This will reduce the material costs of testing, without compromising the quality of the tests themselves.Item Energy-Efficient and Cost-Effective Methods of Driving Trains under the Conditions of Development of the Electricity Market(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Pshynko, Alexander N.; Afanasov, Andriy M.; Kuznetsov, Valeriy; Skalozub, Vladyslav V.; Arpul, Serhii V.; Ivanov, Alexander P.ENG: Abstract. The article for the first time considers the possibilities for the organization of cost-effective rail transportation on electrified section in terms of the functioning of the Ukrainian balancing electricity market. It is formulated the complex task of choosing effective mechanisms of purchase and sale on the electricity market on the basis of contracts for the implementation of markets "for the day ahead", as well as for the appointment of parameters and tariffs of the intraday market. The authors presented the models and results of calculations of optimum modes of trains’ driving, which are calculated for various criteria of efficiency taking into account the cost of the consumed active and reactive electric energy. The technique of tariff formation for purchase of electricity on the balancing market was proposed.Item Improving the System of Electricity Consumption Rationing(MATEC Web of Conferences, 2024) Arpul, Serhii V.; Afanasov, Andrii M.; Babyak, Mykola O.; Vasilyev, Viacheslav E.ENG: The main tool for reducing energy consumption in train traction is the construction of such a system of electricity consumption rationing, which will allow to reliably analyse and forecast energy consumption. This requires the development of a scientifically based system for rationing electricity consumption in train traction and its widespread implementation in locomotive depots. The purpose of the study is to improve the system of technical rationing of electricity consumption by freight trains. To this end, an attempt was made to solve the following tasks: to determine tools for assessing the impact of operational factors on electricity consumption using information from samples of drivers' route sheets by the method of statistical analysis; based on the conducted research, to propose an improved system of technical rationing of energy consumption in freight train traction. The proposed method of technical rationing allows for more accurate calculation of electricity consumption per trip and, as a result, provides a greater incentive effect for saving electricity by locomotive crews.