scholarly journals Detecting development scenarios of dynamic events in electric power network smart-grids. Part two “Selective Protection”

2021 ◽  
Vol 4 (4) ◽  
pp. 311-328
Author(s):  
Vitaliy F. Sivokobylenko ◽  
Andrey P. Nikiforov ◽  
Ivan V. Zhuravlov
Keyword(s):  
Decision Making ◽  
Electric Power ◽  
Smart Grids ◽  
Structural Information ◽  
Electric Power Industry ◽  
Distribution Networks ◽  
Information Model ◽  
Theoretical Description ◽  
Level Control ◽  
Hierarchical Levels

When implementing development concepts in the electric power industry (such as “Smart Grid”, “Digital substation” and “Outsourcing of services”), the task of ensuring stable relay protection operations and automation devices is urgent. The problem is solved according to the developed structural-information (SI) method. A method for selective search of the optimal amount of structured information for automatic decision-making is proposed. The article discusses an algorithm for recognising scenarios for the development of semantic events, which is included in the SP-method. The algorithm is applied uniformly for all hierarchical levels of recognition, based on the goals of decision making at the senior level. Control of the sequence of information events is performed in the dynamics of the passage of events along one path from all relationships according to the structural-information model. Part 1 shows a collaborative structural-information model consisting of a shaping tree in a dynamic object and a recognition tree in devices. A theoretical description of the algorithm is given using the amplitude and time (Ξ,Η) selectivity windows in the general structural scheme of S-detection. The application of the method for different hierarchical levels of recognition is shown. The decision-making results are presented in two forms, by means of a single semantic signal to indicate a group of results and filling in the table of the sequence of occurrence of the recognised elementary information components. Part 2 shows the application of the SPmethod at different hierarchical levels of recognition for the synthesis of a selective relay, which implements an algorithm for finding a damaged network section with single-phase ground faults in 6-35 kV distribution networks with a Petersen’s coil. The reasons for the unstable operation of algorithms of known selective relays are indicated, based on the concepts of scenario recognition. The improvement of the structure of a selective relay operating on the basis of the criterion for monitoring the coincidence of the first half-waves of the mid-frequency components in the signals of transient processes is considered. Examples of the synthesis of elementary detectors of absolute, relative and cumulative actions in relation to a selective relay are given, which make it possible to fill the amount of information for general S-detection. The simulation of the operation of the synthesised S-detector on the signals of real emergency files of the natural development of damage to the isolation of the network phase and simulation of artificial scenarios of events in the mathematical SI-model are carried out.

Analysis of Regulatory Documents on the Creation and Operation of Intelligent Power Supply Systems for Rural Consumers

2021 ◽  
Vol 1 (42) ◽  
pp. 8-15
Author(s):  
Aleksandr Vinogradov ◽  
◽  
Anatoliy Seyfullin
Keyword(s):  
Power System ◽  
Electric Power ◽  
Electricity Markets ◽  
Power Supply ◽  
Electric Power Industry ◽  
Distribution Networks ◽  
Power Industry ◽  
Regulatory Documents ◽  
Rural Consumers ◽  
Supply Systems

The construction of intelligent power supply systems for rural consumers (microgrids) is a promising concept for the development of the energy infrastructure of agricultural facilities. In the process of designing and operating micro-networks, a large number of technical, organizational and legal issues arise, the correct answer to which affects on the reliability, quality and efficiency of electricity supply to agricultural facilities. The analysis of the documentation regulating these processes is of particular relevance. (Research purpose) The research purpose is in analyzing the documentation regulating the construction and operation of intelligent power supply microgrid systems for rural consumers. (Materials and methods) The article reviews regulatory documents in the field of regulation of the electric power industry, distributed generation facilities, renewable energy sources, and the functioning of retail electricity markets. Authors used the method of system analysis, methods of comparisons and analogies, and expert assessments. (Results and discussion) The article presents the issues of functioning of micro-networks of rural consumers as part of the power system, in retail electricity markets; implementation of technological connection and integration of micro- networks into distribution networks. Authors evaluated the regulatory and technical documents regulating the general technical requirements for the design and operation of micro-networks. Domestic and foreign standards for the connection and parallel operation of micro-networks with distribution networks as part of the power system and special documents on micro-networks has been studied. (Conclusions) The article proposes measures for the development of GOST R based on the European IEC TS 62898-1 «Microgrids», harmonized with the requirements of Russian standards, taking into account the features of the Russian electric power industry and agriculture. The article notes the need to make changes to the Russian network codes to ensure the integration of rural micro-networks. The measures of state support aimed at stimulating the spread of intelligent power supply systems for rural consumers were cited.

CROSS-SUBSIDIZATION IN TARIFF DESIGN FOR ELECTRICITY

2020 ◽  
Vol 3 (7) ◽  
pp. 30-39
Author(s):  
S. Ya. CHERNAVSKII ◽  
◽  
N. R. KHACHATURYAN ◽  
Z. N. TSVETAEVA ◽  
◽  
...  
Keyword(s):  
Decision Making ◽  
Electric Power ◽  
Electric Power Industry ◽  
Power Industry ◽  
The Public ◽  
Negative Side ◽  
Positive Side ◽  
Cross Subsidization ◽  
Electricity Tariff

The article highlights one of the unsolved problems of the Russian power industry management. In most of the works, cross-subsidization in the electric power industry is considered in negative connotations. It is shown that in the design of the electricity tariff with cross-subsidization, along with the negative side, there is also a positive side. The article presents views on the problem of people who are active in decision-making, but pas-sive in the public scientific space.

scholarly journals Development of intelligent energy systems: the concept of smart grids in Uzbekistan

2020 ◽  
Vol 166 ◽  
pp. 04001 ◽  
Author(s):  
Sirojiddin Khushiev ◽  
Oybek Ishnazarov ◽  
Obid Tursunov ◽  
Urolboy Khaliknazarov ◽  
Bekhzod Safarov
Keyword(s):  
Electric Power ◽  
Electricity Market ◽  
Smart Grids ◽  
Electric Power Industry ◽  
Electric Networks ◽  
Grid Systems ◽  
Power Complex ◽  
Market Relations ◽  
Energy Reform

In the process of energy reform, liberalization and deregulation of the electricity market, a number of features have been identified that are related to the fact that in the conditions of market relations, the economic benefit and the price of electricity for consumers become a priority. There is certain isolation of networks and power lines from generation facilities; attention is lost to such an important problem as the reliability and safety of power supply. In this situation, the load on the power elements of the electric network increases, there is a need to create appropriate reserves of generating capacities, to increase the throughput of electric networks. All this involves increasing the role of system operators and improving supervisory control systems. The strategic goal of this study was to analyze the development of the electric power complex by the creation of smart grid systems as a platform for market, managerial and technological innovations that provide a transition to a new level of development of the electric power industry in Uzbekistan.

scholarly journals AN APPROACH FOR COMMUNICATION RELAIBILITY USING SELF-ADAPTIVE AUTONOMIC COMPUTING TECHNIQUES

2019 ◽  
Vol 18 (1) ◽  
pp. 041
Author(s):  
Aleksandar Stanimirović ◽  
Miloš Bogdanović ◽  
Nikola Davidović ◽  
Aleksandar Dimov ◽  
Krasimir Baylov ◽  
...  
Keyword(s):  
Electric Power ◽  
Power Supply ◽  
Autonomic Computing ◽  
Low Voltage ◽  
Distribution Network ◽  
Electric Power Industry ◽  
Distribution Networks ◽  
Electricity Distribution ◽  
Time Data ◽  
Self Adaptive

Interdependency of electric power grids and information and communication technology is a rapidly growing topic. With the introduction of Smart Grid, handling dynamic load tracking, dynamic tariffs, clients that can consume but also produce electricity that can be delivered to the grid has become a part of everyday operational cycles within power supply companies. Hence, electricity distribution and power supply companies are in need for introduction of efficient mechanisms for the optimal tracking and use of available electric energy. In this paper, we describe the low voltage (LV) distribution network monitoring system developed for the Electric Power Industry of Serbia (EPS) electricity distribution company. The system we present is implemented in a way so that it provides abilities to measures, communicates and stores real-time data, translating it into actionable information needed by EPS to meet the described challenges regarding LV distribution networks. The implemented system is using self-adaptive autonomic computing techniques to provide a reliable data transfer from measurement devices deployed in different parts of the LV distribution network.

scholarly journals Calculation of Technological Consumption (Loss) of Electricity in Modern 0.38–10 kV Electrical Distribution Networks

2018 ◽  
Vol 61 (5) ◽  
pp. 408-422 ◽  
Author(s):  
M. I. Fursanov ◽  
A. A. Zalotoy ◽  
V. V. Makarevich
Keyword(s):  
Electric Power ◽  
General Scheme ◽  
Electric Energy ◽  
Flow Distribution ◽  
Electric Power Industry ◽  
Distribution Networks ◽  
Distribution Coefficients ◽  
Technological Condition ◽  
Electrical Networks ◽  
Distribution Lines

. New conditions of functioning of electric power industry, tougher of requirements to technological condition of the industry predetermined transition to restructuring of electric networks on the basis of innovative structure of SMART GRID. This leads to the improvement of traditional tasks of calculation and analysis of modes and technological consumption (loss) of electricity. The authors have developed a promising method of operational calculations of technical losses of electricity in modern electrical networks of 0.38–10 kV on the basis of telemechanical graphs of loads on the head sections of distribution lines, in the area of additional installation of digital metering devices and of sources of distributed generation. The method proposes a new technique for determining the flow of electric energy in the sections of distribution lines. This is done as follows. First, according to the data of additional measurements of the network and taking into account the calculated no-load losses of transformers, electricity flows are calculated in the head sections of 6–10 kV lines. Then, according to the obtained data and the measured values of the active and reactive energy graphs of the head sections, the electric power flows targeted for their subsequent distribution over all sections of the 0.38–10 kV network are determined, taking into account the load losses of electricity and the flow distribution coefficients. The distribution coefficients are the fractions of the calculated phase loads of the 0.38 kV network of their total value. Then, according to the obtained data and the measured values of the active and reactive energy graphs on the head sections, the electric power flows intended for their subsequent distribution over all sections of the 0.38–10 kV network are determined, taking into account the load losses of electricity and the flow distribution coefficients. The basic analytical relations concerning the estimation of losses and mode as well as an example of calculation of technological consumption (loss) of electricity in the general scheme of the distribution network of 0.38; 6 and 10 kV are given. The latter is performed for a single (first)stage of load graphs.

From the GOELRO Plan to Digitalization of Russia’s Electric Power Complex

2020 ◽  
Vol 12 (12) ◽  
pp. 14-30
Author(s):  
Aleksey B. LOSKUTOV ◽  
◽  
Aleksandr L. KULIKOV ◽  
Pavel V. ILYUSHIN ◽  
◽  
...  
Keyword(s):  
Smart Grid ◽  
Electric Power ◽  
Electricity Market ◽  
Smart Grids ◽  
Distribution Networks ◽  
Reliable Operation ◽  
Power Sources ◽  
Renewable Power ◽  
Environmental Objectives ◽  
Power Complex

Owing to adoption of the GOELRO plan in 1920 and its stage-by-state implementation, it became possible to meet the country’s needs for intense development of its economy through providing the required amounts of electricity to all sectors of the national economy. Nowadays, the smart grid technologies open the possibility to carry out «digital updating» of the grids to obtain their better observability and controllability, smaller losses in them, and to ensure reliable operation of distributed and renewable power generating facilities, which have become new participants in the electricity market. The use of smart grid technologies opens the possibility to optimally integrate heterogeneous electric power sources, backbone and distribution networks, and also active consumers into a unified electric power complex for achieving the economic and environmental objectives. The article considers modern innovative and prospective technologies of smart grids and outlines historical parallels with the GOELRO plan, which determined the course for electrification of Russia.

scholarly journals Towards the Flexible Distribution Networks Design Using the Reliability Performance Metric

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6193
Author(s):  
Ilia Shushpanov ◽  
Konstantin Suslov ◽  
Pavel Ilyushin ◽  
Denis N. Sidorov
Keyword(s):  
Power System ◽  
Electric Power ◽  
Power Distribution ◽  
Distribution Network ◽  
Electric Power Industry ◽  
Distribution Networks ◽  
Power System Protection ◽  
Power Distribution Networks ◽  
System Protection ◽  
Flexible Distribution

At present, the entire world is moving towards digitalization, including in the electric power industry. Digitalization is in its heyday and a lot of articles and reports are devoted to this topic. At the same time, the least digitalized of the electrical networks are distribution networks that account for a very large share in electric power systems. The article proposes a methodology for creating a flexible distribution network based on the use of digital technology. Additionally, we elaborate a methodology with the identification and collection of the necessary information to create digital networks, develop ways to adapt the required equipment, and suggest methods of recognition of some short circuits. Furthermore, we address the issue of reliability of the information obtained from digital devices, develop a technique for arranging the devices to cover the entire network as required to improve the power system protection of electrical power distribution networks. The above measures make it possible to ensure the flexibility of the active distribution network, as well as to adjust the parameters of the actuation of power system protection depending on changes in external conditions and in the event of emergencies. We propose a technique for controlling the distribution network, based on the factoring-in of the type of damage during an emergency in real time, as well as a technique for arranging the measuring devices and the creation of an information and communication network. We provide recommendations for the design and operation of electric power distribution networks with digital network control technology.

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