SYNTHESIS OF THE STRUCTURE OF AUTONOMOUS POWER SUPPLY SYSTEMS BASED ON RENEWABLE ENERGY SOURCES

Author(s):  
S.A. Keshuov ◽  
G.S. Baisenova ◽  
N.I. Moldybaeva
Author(s):  
Mykhailo Syvenko ◽  
Oleksandr Miroshnyk

A detailed substantiation of the use of electric energy storage devices in the presence of generators on renewable energy sources in the power supply system is given. The dependence of the storage parameters on the composition and priority of generation in the system is investigated. The solution of the problem of determining the parameters of electricity storage devices by means of purposeful simulation of generation parameters is considered. The results of the choice of power and capacity of the energy storage using technical and economic indicators are shown. Optimal parameters of electric energy storage devices as one of the most important means of ensuring the activity of isolated power supply systems together with selection of generating devices are determined. The results of calculations of capacity of renewable energy sources in isolated power supply systems in combination with classical energy sources are given. The necessity of using the principle of activity of the distribution electric network and the possibility of its realization is demonstrated. The optimal storage capacity as a function of the share of renewable generation, the non-integrated energy produced by renewable sources and the total storage capacity are plotted for several isolated systems. The main points of the used model of the power supply system of isolated networks are given. In the studied isolated power supply systems, wind power plants and solar power plants, which have significant unpredictability of generation, are used as generation based on renewable energy sources. The problem of undersupply of electricity to the grid by stepwise increase of generation is analysed. The results of the multi-step selection of power and energy consumption of electricity storage are determined by technical criteria.


2019 ◽  
pp. 36-41
Author(s):  
Kachan Yu ◽  
Kuznetsov V

Purpose. Identify the features of operation of wind farms as an auxiliary supplier of electricity for non-traction consumers of railway networks and analyze the main factors that directly affect the use of wind farms due to the random nature of wind flow and additional factors due to the above conditions in different climates. The research methodology is based on modern methods of computational mathematics, statistics and information analysis using modern computer technology. Findings. The need to use renewable energy sources in the power supply systems of non-traction consumers of railway transport is obvious. Given the constant growth of prices and tariffs for electricity in Ukraine, more and more attention is paid to its savings and the search for the cheapest and most affordable alternative sources. The authors consider issues related to the possibility of using additional generation of electricity in the power supply systems of railway transport through the use of wind turbines, including for non-traction consumers. The analysis of wind flow features in some regions of Ukraine was carried out, and the measurement of wind speed in Zaporizhia and Dnipropetrovsk regions was obtained with the help of a compact wind speed sensor manufactured by Micro-Step-MIS LLC (Russia). The obtained values of wind speed were recorded and stored digitally. The received information of the above device was processed. The authors conclude that in the case of using wind turbines as an additional power source in the networks of non-traction consumers of railway power supply systems it is economically advantageous to connect them directly to these networks and fully use all electricity produced by them, reducing its consumption from this power supply system. The originality is that the use of renewable energy sources in the power supply systems of non-traction consumers of railway transport, in particular wind turbines, is proposed. Practical implications. Introduction of wind power plants as an auxiliary supplier of electricity for non-traction consumers of railway power grids in order to minimize electricity costs. Keywords: renewable energy sources, quality of electric energy, wind power plant, power supply networks of railway transport, non-traction consumers of railway electric networks, electricity production, wind speed.


2019 ◽  
pp. 54-60
Author(s):  
Kachan Yuriy ◽  
Kuznetsov Vitaliy

Purpose. Describe the tools used by the authors for experimental research on the possibilities of using renewable energy sources in the power supply systems of non-traction consumers of railway transport. The methodology of research is based on modern methods of computational mathematics, statistics and information analysis using modern computer technology. Findings. To date, there is no comprehensive approach and specific reasonable measures for the introduction of re-newable energy sources in the energy supply of non-traction consumers. The article presents examples of the introduction of renewable energy sources in the power supply systems of railways abroad. It is noted that when using different renewable energy sources in the power supply systems of non-traction consumers, it is necessary to have a volume of statistical information to determine their technical and economic indicators. The classification of wind power plants with a horizontal axis is given. The schematic diagram and general view of the developed experimental wind power plant are given. The schematic diagram and general view of the developed experimental photovoltaic plant are given. The equipment used for research of wind flow and intensity of solar radiation in places of possible location of wind power or photovoltaic installations is considered. The presented experimental wind power and photovoltaic plants, which serve for a comprehensive study of the possibilities of using wind and solar sources in the power supply systems of non-traction consumers, are generalized and allow to clarify the necessary data for decision making. The originality is the introduction of renewable energy sources in the power supply system of non-traction consumers of railway transport. Practical implications. The use of additional renewable energy sources to supply non-traction consumers minimizes electricity consumption. Keywords: renewable energy sources, quality of electric energy, wind power plant, photovoltaic plant, power supply networks of railway transport, traction and non-traction consumers, electricity production


Author(s):  
Boris V. Lukutin ◽  
Violetta R. Kiushkina

The article offers evaluation of the potential of renewable energy in improving the energy security of decentralized power supply systems and solving the problems of their development. The authors proposed a complex of indicative indicators with introduction of renewable energy sources as part of separate indicators, which allows us to research the energy security problems of regional decentralized energy systems of power supply. In the rationale for each indicator the place of renewable energy sources in aspects of resource security, the level of reliability of autonomous power supply systems, environmental and other positions of energy security have been shown. The proposed module of indicators with introduction of renewable energy includes a science-based list of criteria, methods and tools for their evaluation with the focus of measures to ensure energy security by means of integrating into autonomous power supply systems of renewable energy plants. The article traces the matching of the proposed approaches with the place of renewable energy in strategic planning documents in the national security of the Russian Federation


Author(s):  
М.С. Харитонов ◽  
А.Ю. Никишин ◽  
И.Е. Кажекин

В последние десятилетия наблюдается интенсивный рост морской торговли и увеличение объёмов морских грузоперевозок, которые привели к развитию соответствующей береговой инфраструктуры. Развивающиеся морские порты в ряде случаев становятся центрами экономического роста прибрежных территорий. Из-за локализации негативных экологических факторов в портовом регионе особое значение приобретают проблемы обеспечения экологической безопасности и устойчивого развития. Одним из эффективных методов снижения техногенного воздействия на экологию является замещение ископаемых видов топлива возобновляемыми источниками энергии, обеспечивающими электроэнергию для портовых операций и берегового питания морских судов. Однако для устьевых портов, как правило, характерны ограниченность территорий и пониженный потенциал возобновляемых ресурсов, в частности ветроэнергетики, в виду удаленности от прибрежных морских территорий. В статье на примере Калининградского морского торгового порта рассмотрены вопросы использования возобновляемых источников энергии для целей электроснабжения. Дана оценка потенциала солнечной и ветроэнергетики. Выполнен анализ системы электроснабжения порта и даны рекомендации по внедрению систем распределенной генерации на основе возобновляемых источников энергии. Recent decades have shown rapid growth of maritime trade and an increase in sea freight volumes, which led to the development of coastal infrastructure. Developing seaports in some cases become centers of economic growth in coastal areas. Due to the localization of negative environmental factors in the port region, problems of ensuring environmental safety and sustainable development are of particular importance. One of the effective methods to reduce the technogenic impact on the environment is the replacement of fossil fuels with renewable energy sources that provide electricity for port operations and onshore power supply of ships. However, estuarine ports have limited territories and a reduced potential of renewable resources, in particular wind energy, due to the remoteness from coastal marine territories. The article examines the use of renewable energy sources for power supply using the example of the Kaliningrad Sea Trade Port. An assessment of the potential of solar and wind energy is given. The analysis of the power supply system of the port was carried out and recommendations were given for the implementation of distributed generation systems based on renewable energy sources.


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