Transient States Modeling in Power Supply Systems with Lower Electrical Energy Quality and with Distributed Generation Plants

2020 ◽  
Author(s):  
Yuri N. Bulatov ◽  
Andrey V. Kryukov ◽  
Nguyen Van Huan
Keyword(s):  
Distributed Generation ◽  
Power Supply ◽  
Electrical Energy ◽  
Transient States ◽  
Supply Systems

scholarly journals Features of Estimation of Structural Reliability of Power Supply Systems

2019 ◽  
Vol 139 ◽  
pp. 01032
Author(s):  
Boris Papkov ◽  
Vladimir Osokin
Keyword(s):  
Distributed Generation ◽  
Power Supply ◽  
Structural Reliability ◽  
Renewable Energy Sources ◽  
Integral Characteristic ◽  
Electric Power System ◽  
Mathematical Apparatus ◽  
Reliability Indicators ◽  
Demand Changes ◽  
Supply Systems

Development and operation of modern power supply systems of consumers which are the part of distributed generation (DG) systems with their communication with electric power system (EPS) and renewable energy sources (RES) demand changes in estimation of their reliability indicators on the basis of corresponding mathematical apparatus. It is shown that DG systems refer to structures with several overlapping zones of action, which determines their peculiarities, which are represented by some integral characteristic - efficiency of operation, which characterizes the degree of expediency of use of the DG system in different modes. The approach based on evaluation of effectiveness of such systems is offered. Examples of calculation of relatively simple structures of DG systems performing several tasks simultaneously are given.

scholarly journals Technology for reducing the consumption and losses of electrical energy in the power supply systems of railway consumers

2018 ◽  
Vol 239 ◽  
pp. 01033
Author(s):  
Vasily Cheremisin ◽  
Yury Demin ◽  
Alexander Komyakov ◽  
Vladimir Ivanchenko
Keyword(s):  
Influencing Factors ◽  
Power Supply ◽  
Electrical Energy ◽  
Design Solution ◽  
Specific Power ◽  
Railway Transport ◽  
Power Losses ◽  
System Parameters ◽  
Supply Systems ◽  
Efficiency Indicators

The paper is devoted to the development of technology for reducing the consumption and losses of electrical energy of railway transport enterprises on the basis of the concept of “smart enterprise”. A design solution to the monitoring and management system for energy efficiency indicators was proposed; monitored parameters and influencing factors were determined. The application of the simulation model in the MATLAB/Simulink program for determining the set values of the monitored system parameters, namely, power losses and power factor depending on the influencing factors, is considered. The approximating equation is obtained. Specific power losses were calculated for various control options.

scholarly journals SMART GRID TECHNOLOGY, TRANSMISSION OF ELECTRICAL ENERGY IN POWER SUPPLY AND LIGHTING SYSTEMS OF CITIES

2020 ◽  
pp. 10-14
Author(s):  
P. P. Hovorov ◽  
K. V. Hovorova ◽  
А. К. Kindinova ◽  
O. Abdelrahim
Keyword(s):  
Smart Grid ◽  
Power Supply ◽  
Reactive Power ◽  
Mutual Influence ◽  
Electrical Energy ◽  
Operating Efficiency ◽  
Centralized Control ◽  
Power Losses ◽  
Lighting Systems ◽  
Supply Systems

Modern power supply and lighting systems of cities are complex electrical systems of an automated type, in which the processes in individual power supply systems and city lighting systems are interconnected and interdependent. Therefore, the search for efficient technologies for the transmission of electrical energy in them is an extremely difficult task. The real state of the power supply and lighting systems in cities today is characterized by low operating efficiency, largely due to the low quality of electrical energy and insufficient compensation of reactive power in them. The mutual influence of power supply and lighting systems in cities, as well as the presence of significant voltage deviations and the overflow of additional reactive power in the networks, causes an increase in voltage and power losses in them, as well as a decrease in the efficiency of networks and connected consumers, in general. Unfortunately, the existing methods and technical means based on them cannot fully solve this problem. The research carried out made it possible to clarify the nature of the processes in the power supply systems and the sanitation of cities and to determine the methods and technical means based on the Smart Grid concept. They are based on the use of phase-shifting booster transformers with an electronic control system. Their use made it possible to provide the possibility of complex control of the voltage modes of active and reactive power with the possibility of installation at any point in the network and centralized control from a single centre. The calculations show that the use of the developed methods and technical means provides an opportunity to reduce power losses in networks by 10–15% and energy costs for consumers by 50–75%.

scholarly journals To the issue of assessing the efficiency of distributed generation in low-voltage electric networks

2020 ◽  
Vol 178 ◽  
pp. 01077
Author(s):  
A.N. Alyunov ◽  
A.Yu Belyanin ◽  
A.E. Nemirovsky ◽  
D.A. Zaripova
Keyword(s):  
Power System ◽  
Distributed Generation ◽  
Power Supply ◽  
Low Voltage ◽  
Electric Networks ◽  
Cost Of Electricity ◽  
Industrial Enterprises ◽  
Urgent Task ◽  
The Cost ◽  
Supply Systems

This article considers an urgent task of using autonomous sources for power supply systems of industrial enterprises of small and medium-sized production. The efficiency of choosing the time of their switching-on in peak hours of power system in order to reduce the cost of electricity is shown on the example of diesel generators.

scholarly journals Timely determination of static stability margins in power supply systems equipped with distributed generation installations

2021 ◽  
Vol 25 (1) ◽  
pp. 31-43
Author(s):  
Yu. N. Bulatov ◽  
A. V. Kryukov ◽  
К. V. Suslov ◽  
A. V. Cherepanov
Keyword(s):  
Distributed Generation ◽  
Power Supply ◽  
Computer Modelling ◽  
Dynamic Modelling ◽  
Electrical Network ◽  
Electrical Networks ◽  
Stability Margins ◽  
Emergency Control ◽  
Supply Systems

The article aims to develop a methodology to ensure timely determination of the margins of static aperiodic stability in power supply systems, at the nodal points of which distributed generation units are installed. The authors used mathematical methods and algorithms based on the application of limiting regime equations. Transitional processes were analysed for various points in the space of controlled mode parameters according to the simulation modelling in Matlab using the Simulink and SimPowerSystems packages. On the basis of the obtained results, an effective technique for analysing stability margins in electrical networks with distributed generation units was implemented. This method is applicable in design problems, as well as in operational and emergency control. The conducted theoretical analysis and computer modelling showed the effectiveness of the proposed methodology for calculating stability margins; the nondegeneracy of the Jacobi matrix of limiting regime equations at the solution point ensures the guaranteed reliability of the results. It was shown that an alternative approach to solving the problem of timely determination of aperiodic stability margins can be implemented on the basis of limiting regime equation with increased nonlinearity. Dynamic modelling of an electrical network with distributed generation units confirmed the correctness of determining the stability margins calculated using limiting regime equations. The developed technique can be recommended for practical use in the design of power supply systems or in operational control of synchronous generators. In particular, the presented methodology can be used to implement a multi-agent emergency control system for distributed generation installations located in generalpurpose distribution electrical networks. 

scholarly journals Analysis of the concepts of building microgrids containing distributed generation objects

2021 ◽  
Vol 288 ◽  
pp. 01108
Author(s):  
Alexander V. Vinogradov ◽  
Anatoly Y. Seyfullin ◽  
Alina V. Vinogradova ◽  
Vadim E. Bolshev ◽  
Alexey V. Bukreev ◽  
...  
Keyword(s):  
Electric Power ◽  
Distributed Generation ◽  
Power Supply ◽  
Switching Systems ◽  
Modes Of Operation ◽  
Nominal Voltage ◽  
Similarities And Differences ◽  
Supply Systems

In this article, the authors consider the materials of research on the construction and operation of intelligent power supply systems with a nominal voltage of up to 1000 V, containing distributed generation facilities. The author’s approach to the construction of microgrids based on multi-contact switching systems is proposed. The similarities and differences of the presented concepts are determined. The main problematic issues that arise in the process of implementing projects for the construction of microgrids and the management of electric power modes of operation are formulated. The ways of solving the problems related to the management of the modes of operation of microgrids are proposed.

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