Кафедра "Інтелектуальні системи електропостачання" (раніше кафедра "Енергопостачання залізниць")

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http://crust.ust.edu.ua/handle/123456789/655

ENG: Department of Power supply of railways (Department of Power of Railways, renamed the 31.10.2016)

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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.
Efficiency of Energy Storage Control in the Electric Transport Systems
(Politechnika Warszawska; Instytut Transportu, Poland, 2022) Sablin, Oleg I.; Bosyi, Dmytro O.; Kuznetsov, Valeriy; Lewczuk, K.; Kebal, Ivan; Myamlin, Sergiy S.
ENG: The problems of storage and supplying the energy, together with reducing energy intensity for transport, are now crucial for developing sustainable and reliable transport systems. The energy network must be gradually adapted to new loads and power consumption patterns, especially in railways. The article aims to develop the simulation model to investigate the energy storage systems in its use in the electric transport infrastructure. The authors review selected technical solutions for electric energy storage in transport. The theoretical aspects of energy exchange in the energy storage systems were presented as a base for a continuous simulation model of electric transport power supply. In the non-periodic random voltage input applied to the storage unit, it is proposed to use the calculation method based on the Duamel integral to analyze its charge-discharge processes. The resistance functions were applied to analyze the traction power supply mode with variable in time and space by active loads. The simulation showed that the direct connection of the unit to the traction network significantly reduces the traction energy consumption.
Energy Efficient Modes of Distribution Power Supply Systems with Different Vector Group of Transformer
(National Technical University of Ukraine "Igor Sikorsky Kiev Polytechnic Institute", 2019) Zemskyi, Denys R.; Bosyi, Dmytro O.
EN: The article is devoted to the experiment, what was performed on the local distribution networks with poort power quality. As a rule, these networks are subsystem of AC traction power supply system, and their design causes voltage unbalance and other power quality problems in consumers.Often, the network is powered by transformers with different vector groups, therefore their parallel operation is impossible. The purpose of the experiment is to assess the effect on energyquality of a regime with sources on both sides. The quality of electrical energy was estimated, considerable attention is devoted to unbalance voltage. Using the statistics methods measurement data are studied. During the experiment, the energy quality improved when the parallel mode was used. The tconcept of smart grid has been proposed to reduce energy losses for dynamic power management.
Increasing Power Supply Efficiency for “Two Wire-Rail” Line Consumers
(Instytut Kolejnictwa, Warszawa, 2020) Bosyi, Dmytro O.; Zemskyi, Denys R.
EN: The article is devoted to the problem of non-traction consumers power supply of AC railways. Th e low efficiency of energy transfer is caused by the design of a non-traction power supply line. Th e absence of bilateral power is typical for non-traction network 27,5 kV which consist of “two wire-rail” lines. This line is outdated technology, which does not correspond to modern requirements on the power quality, but used on AC railways with three-phase traction transformers. The purpose of the article is to investigate the methods of power supply improvements for non-traction consumers in terms of voltage unbalance, harmonic distortions and energy losses. Connection of the phasing device to delta winding traction transformer for bilateral supplying non-traction customers from network 27,5 kV is suggested in the article. The implementation of a method to increase the efficiency of electricity transmission in the non-traction network power supply allows to reduce power losses from 720 MWh / year to 441 MWh / year, the voltage unbalance from 1,9% to 1,3% and the total harmonic distortion from 8 % to 6 % respectively. Additionally, investment attractiveness of the decision was evaluated.
Intelligent Technologies for Efficient Power Supply in Transport Systems
(Silesian University of Technology, 2017) Bosyi, Dmytro O.; Sablin, Oleh I.; Khomenko, Iryna Yu.; Kosariev, Yevhen M.; Kebal, Ivan Yu.; Myamlin, Sergii S.
EN: The main directions of development of the energy-saving technologies in electrified transport systems are considered in the article with taking into account the flexible regulating features of modern power equipment. The proposed theory and principles of functioning allow understanding the optimal control laws for converters, accumulators, and renewable energy sources in their integration into traction power supply systems. Research opens the possibility of the installed power of the required equipment in minimizing and reducing the capital costs for energy-saving technologies. Also, combination of all developed approaches will provide the system effect.
Mathematical Modeling of Rocks Plasma Disintegration Process at Borehole Reaming
(IOP Publishing Ltd, 2023) Potapchuk, Iryna Yu.; Zhevzhyk, Oleksandr V.; Kholiavchenko, Leonid; Pertsevyi, Vitalii; Bosyi, Dmytro O.; Drubetskaya, Tanya; Potapchuk, Anna
ENG: The mathematical model of thermal disintegration of rocks during the reaming of boreholes, which takes into account the compatibility of the thermogas dynamic problem for a high-temperature heat transfer agent and the thermal problem for the rock heated by this heat transfer agent, has been developed. The mathematical model is based on the laws of conservation of mass, quantity of motion and energy and takes into account the dependences for determining the thermal stresses and the temperature of brittle fracture of rocks. As a result of solving the equations of the mathematical model, the temperature distribution in the rock mass (magnetite quartzite) during heating in the process of borehole plasma reaming and productivity of the borehole plasma reaming process are obtained. Calculated and experimentally determined productivity of the process of plasma reaming of the borehole were compared.
Modeling of the Controlled Traction Power Supply System in the Space-Time Coordinates
(Silesian University of Technology, 2017) Bosyi, Dmytro O.; Kosariev, Yevhen M.
EN: The problems of the traction power supply system calculation are considered in the article. The authors proposed the space-time model, which is based on the analytical functions of the current- and voltage-drop distributions in the contact network. The usage of the proposed model is shown for the control law calculation both to stabilize the voltage at the pantographs of the electric rolling stocks and to reduce the power losses.
Numerical Modeling of the Thermal Characteristics of a Fan Spray Cooling Tower
(IOP Publishing, 2024) Zhevzhyk, Oleksandr V.; Potapchuk, Iryna Yu.; Pertsevyi, Vitalii; Bosyi, Dmytro O.; Biriukov, Dmytro; Shevchenko, Serhii
ENG: The work constructs a mathematical model of the heat and mass transfer process in a spray cooling tower. The mathematical model consists of the equations of motion and heat and mass transfer of water droplets and the equations of thermal and material balance of moist air, considers the polydispersity of the droplet flow and allows to calculate the cooling capacity of the cooling tower depending on the parameters of the droplet flow. The mathematical model is confirmed by the results of industrial tests of irrigation-free cooling towers. The simulation results show that the cooling capacity of a spray fan cooling tower significantly depends on the atomization dispersion and the height of the water cutting nozzles. Reducing the average diameter of the droplet flow to less than 2 mm and increasing the height of the nozzles H > 4...5 m make it possible to achieve the cooling performance of known cooling towers with nozzle. The mathematical model allows to calculate the cooling capacity of the cooling tower and determine the necessary individual parameters of the droplet flow for each type of equipment and consumers for which the specific energy costs for cooling is minimal.
Renewable Electricity Sources Selection Based on the Economy Applied Approach
(IEEE, 2022) Antonov, Andrii V.; Bosyi, Dmytro O.
ENG: The aim of the work is to develop an economically justified approach to the selection of renewable sources of electricity. This aim is achieved by construction an automated algorithm that takes into account a set of restrictions for creating the optimal structure of a photovoltaic station. The work confirms the influence of such factors on project implementation as: electricity consumption schedule, built-up area, photovoltaic station mounting system type, allocated amount of money for project implementation, fixed and variable costs for maintenance of photovoltaic station, cost of electricity. The results of an economically justified approach to the selection of renewable sources of electricity at a real photovoltaic station are given. Indicators such as pay-back period and cash flow were calculated, which show the feasibility of the proposed approach.

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