scholarly journals Methodological aspects of evaluating the effectiveness of using local energy systems with renewable sources

2020 ◽  
Vol 154 ◽  
pp. 07013
Author(s):  
Sergij Dudnikov ◽  
Oleksandr Miroshnyk ◽  
Stepan Kovalyshyn ◽  
Vadym Ptashnyk ◽  
Krzysztof Mudryk
Keyword(s):  
Mathematical Model ◽  
Power Supply ◽  
Power Supply System ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Supply System ◽  
Local Energy ◽  
Local Power ◽  
Renewable Sources ◽  
Supply Systems

A method is presented for justifying the construction of a mathematical model of the process of supplying consumers from local sources, taking into account deterministic input information. The target function of the mathematical model is to minimize financial investments in the construction and operation of the local energy supply system using renewable energy sources. Presented activities are aimed at assessing the efficiency of use of fuel and energy resources by local power supply systems, determining the conditions for a positive economic effect, substantiating the composition and main technical parameters of power plants and devices of the local power supply system. At the same time, the conditions of competitiveness of the local power supply system relative to the centralized one should be observed. Sources of local power supply systems should be built on the basis of biogas plants that are capable of producing biogas with long-term storage in gas storages and at the same time are energy storage batteries for other renewable sources. The presented analysis of the energy balance of a biogas plant, taking into account the synergistic effects of interaction between centralized and local energy systems, will make it possible to make optimal decisions for creating a bioenergy complex.

scholarly journals The use of the SCADA system in the monitoring and control of the performance of an autonomous hybrid power supply system using renewable energy sources

2018 ◽  
Vol 44 ◽  
pp. 00180
Author(s):  
Grzegorz Trzmiel ◽  
Maciej Łopatka ◽  
Dariusz Kurz
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Renewable Energy Sources ◽  
Supply System ◽  
Monitoring And Control ◽  
Major Focus ◽  
Hybrid Power ◽  
Scada System ◽  
And Control ◽  
Supply Systems

The paper touches upon the current issues related to the use of visualisation, control and archiving systems (SCADA) in hybrid power supply systems, based on the example of an installation that uses the energy of the sun and wind. The article contains an exemplary design of an autonomous hybrid power supply system and the SCADA system implemented in the Vijeo Citect environment. The major focus is on the presentation of the essential and the most frequently used SCADA system functionalities in terms of the monitoring and control of this type of power supply systems.

scholarly journals IDENTIFICATION AND EVALUATION OF HARMONIC VOLTAGE SOURCES IN POWER SUPPLY SYSTEMS

2021 ◽  
Vol 1 (161) ◽  
pp. 157-162
Author(s):  
D. Kalyuzhniy
Keyword(s):  
Mathematical Model ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Measuring System ◽  
Economic Losses ◽  
Voltage Distortion ◽  
Harmonic Voltage ◽  
The Impact ◽  
Supply Systems

Non-sinusoidal voltage in power supply systems leads to economic losses that need to be distributed and compensated. This problem is solved on the basis of the problem of identification and evaluation of the influence of voltage distortion sources. To date, existing methods for identifying and assessing the impact of harmonic voltage sources have significant limitations of practical implementation. This is due to their basic mathematical model and local approach to measuring the parameters of the network. In the given research the new mathematical model of identification and an estimation of harmonic voltage sources that is focused on the distributed measuring system is presented. The criterion for identifying harmonic voltage sources is the distorting nodal current. To adequately determine it, it is necessary not only to measure the parameters of the network mode in the base nodes by the currents of the higher harmonic components, but also to control the structure and parameters of the replacement circuit of the entire power supply system. To achieve this goal, it is proposed to use a distributed measuring system, which is based on vector measurement systems and control systems. The estimation of the influence of harmonic voltage sources is directly proportional to the distorting nodal current, where the coefficient of proportionality is either mutual or intrinsic resistance of power supply systems, that connects the location of the distortion source and the place for which its influence is estimated. In order to control the influence of measurement errors and determine the parameters of circuits for replacing elements of the power supply system, the method and algorithm for identifying and assessing the impact of harmonic voltage sources should be developed based on the principle of excluding one of the voltage distortion sources.

A Hybrid Decentralized Power Supply System Based on Different Kinds of Renewable Energy Sources

2018 ◽  
pp. 8-13
Author(s):  
Boris M. ANTONOV ◽  
◽  
Nikolai N. BARANOV ◽  
Konstantin V. KRYUKOV ◽  
Yuri K. ROZANOV ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Power Supply ◽  
Power Supply System ◽  
Renewable Energy Sources ◽  
Supply System ◽  
Energy Sources ◽  
Decentralized Power Supply

Analysis of mathematical models of transmission lines.

2020 ◽  
Vol 23 (2) ◽  
pp. 16-19
Author(s):  
G. SHEINA ◽  
Keyword(s):  
Mathematical Model ◽  
Power Systems ◽  
Transmission Lines ◽  
Power Supply ◽  
Power Supply System ◽  
Power Transmission ◽  
Supply System ◽  
Power Lines ◽  
Power Transmission Lines ◽  
The Mathematical Model

This paper investigates a mathematical model of one elements of the power supply system - power transmission lines. The type of models depends on the initial simplifications, which in turn are determined by the complexity of the physics of processes. The task of improving the accuracy of modeling of emergency processes in the power system is due to the significant complexity of modern power systems and their equipment, high-speed relay protection, automation of emergency management and the introduction of higher-speed switching equipment. One of the reasons for a significant number of serious emergencies in the system is the lack of complete and reliable information for modeling modes in the design and operation of power systems. The development of a mathematical model of a three-phase power line, which provides adequate reflection of both normal and emergency processes, is relevant. The advanced mathematical model of power transmission lines allows to investigate various operational modes of electric networks. The improved mathematical model of the power transmission line reflects all the features of physical processes at state modes and transient process and provides sufficient accuracy of the results. The type of mathematical model of power transmission lines depends on the accepted simplifications, depending on the task of research. The purpose of this work is to analyze the mathematical model of the power transmission line to study the modes of operation of the power supply system, with the possibility of its application to take into account all the design features of overhead and cable power lines. The mathematical model of the power line for the study of the modes of operation of the power supply system is analyzed. It is used to take into account the design features of overhead and cable power lines, skin effect.

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