scholarly journals Analysis of the Russian Regulatory Base to Ensure the Electromagnetic Compatibility of Microprocessor Relay Protection and Automation Devices

2021 ◽  
pp. 11-14
Author(s):  
Elena Zenina ◽  
Keyword(s):  
Electric Power ◽  
Electromagnetic Compatibility ◽  
Relay Protection ◽  
Electric Power Industry ◽  
Practical Implementation ◽  
Controversial Issues ◽  
Normative Documents ◽  
Regulatory Documents ◽  
Direct Indication ◽  
Protection Devices

In this work, the author analyzed the texts of normative documents on ensuring electromagnetic compatibility (EMC) of microprocessor relay protection devices (MPS), aimed at creating conditions for ensuring the uninterrupted functioning of power circuits of the electric power complex and their secondary circuits, ensuring the tracking of all processes, collecting information, accounting for electricity and operational control of main technological equipment in real EMO conditions. Controversial issues enshrined in regulatory documents were considered, their relevance was assessed. During the analysis of regulatory documents, it was found that in a number of regulatory documents, both Russian and international, there is a direct indication of the need to ensure electromagnetic compatibility at electric power facilities, however, they provide general methods and recommendations without specifying the list of measured and regulated parameters, do not fix the sequence of actions, tools for measuring and modeling, providing the necessary result. In this regard, the author proposes solutions for introducing electromagnetic compatibility into theory and practicein the electric power industry and bringing regulatory documents to updating and systematization in terms of discussed controversial issues, introducing more accurate and consistent actions and measures during the practical implementation of the methods indicated in the work.

scholarly journals Analysis of Electromagnetic Compatibility of Microprocessor Relay Protection and Automation Devices

2021 ◽  
pp. 12-15
Author(s):  
Elena Zenina ◽  
Keyword(s):  
Power System ◽  
Electric Power ◽  
Electromagnetic Compatibility ◽  
Relay Protection ◽  
Electric Power Industry ◽  
Power Industry ◽  
Power Balance ◽  
Stable Operation ◽  
Special Role ◽  
Protection Devices

In the modern conditions of the development of the electric power complex, relay protection and automation devices play a special role related to protection against possible damage resulting from violations of normal operating modes, both of individual elements and the entire power system as a whole. This, in turn, directly affects the reliable and stable functioning of the main power elements and electrical equipment. Damage to the power part of the equipment of an electric grid complex can be caused by changes in the main parameters of the normal mode: a change (increase) in currents leads to overloads and, in the limit, to short circuits, a decrease in voltage leads to an avalanche of voltage and disruption of the operation of electric motors connected to the damaged section, and an increase in voltage leads to overvoltages in certain sections. In addition, violations associated with a decrease in the transmitted active power lead to a change in frequency, and a violation of the reactive power balance leads to a change in voltage in certain sections, which generally leads to noncompliance with the power balance and loss of stable operation of the power system. The main reasons for failures in operation, false and excessive triggering of microprocessor relay protection devices are considered. The main ways of solving the problem of electromagnetic compatibility in the electric power industry are identified. A solution is proposed to improve the reliability of the operation of microprocessor relay protection devices and the way of development of the problem of electromagnetic compatibility in the electric power industry is shown.

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.

Research of Parameters of Electric Power Systems Affecting Core Saturation of Current Transformers with a Closed Magnetic Circuit in Transitional Short Circuit Modes

2021 ◽  
Vol 64 (1) ◽  
pp. 92-100
Author(s):  
Viliya Ivanova ◽  
◽  
Igor Ivanov ◽  
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Magnetic Circuit ◽  
Short Circuit ◽  
Relay Protection ◽  
Electric Power Systems ◽  
Current Transformers ◽  
Core Saturation ◽  
Protection Devices ◽  
Closed Magnetic Circuit

The relevance of the study is due to the excess of the permissible errors of current transformers in transient short-circuit modes associated with saturation of the cores of current transformers. The latter leads to improper operation of relay protection devices, which can negatively affect the stability of electric power systems and the efficiency of industrial enterprises with a continuous technological cycle, the power failure of which leads to significant economic damage. The aim of this work is to study the parameters of electric power systems that affect the saturation of the cores of current transformers with a closed magnetic circuit in transient short-circuit modes. The object of research is electromagnetic current transformers of accuracy class 10P in electric power systems. The study was carried out using numerical methods for solving algebraic and differential equations, methods of computer modeling of electromagnetic transient processes and functional programming. As a result, the main parameters influencing the nature and intensity of electromagnetic transients in current transformers during a short circuit are noted; it is shown that in transient short-circuit modes, significant errors in the operation of current transformers associated with core saturation are possible; recommended for assessing the compliance of current transformers of accuracy classes 5P, 10P with the conditions for the correct functioning of relay protection devices in transient short-circuit modes, to calculate the time to saturation of current transformers, taking into account the real parameters of the electric power system at the place where current transformers are installed, in addition to the traditional design checking of current transformers by permissible er-rors for the steady state short circuit.

Presentation of the Ukrainian electric power engineering terminology in national lexicography in the end of the 20th – beginning of the 21st century

2019 ◽  
pp. 352-359
Author(s):  
Liliia Kharchuk
Keyword(s):  
Electric Power ◽  
21St Century ◽  
Thermal Power ◽  
Electric Power Industry ◽  
Engineering Industry ◽  
Power Engineering ◽  
Normative Documents ◽  
Electric Power Engineering ◽  
Stage Of Development ◽  
National University

The lexicographical study of the Ukrainian electric power engineering terminology at the present stage of its development is analyzed and outlined. The characteristics of national explanatory and translation dictionaries that contain the terms of the electric power engineering industry is proposed in this study. It is observed that from 1991 till now the Ukrainian electric power engineering terminological system is at the stage of development, revival and revitalization of terminological searches. During the mentioned period significant number of dictionaries of high quality, providing both teaching of professional disciplines in the Ukrainian language and the creation of the Ukrainian educative literature were published. The analyzed lexicography of the present indicates the existence in Ukrainian terminology of a number of valuable and closely related to the electric power industry lexicographic works, which, to a greater or lesser extent, contain electric power engineering terms that serve the electricity industry with a clearly expressed own terminology. Particularly the specific dictionaries that were published in the end of the 20th – beginning of the 21st century, namely, Brief Russian-Ukrainian Electric Power Engineering Dictionary: 5000 terms created by a team from Lviv Polytechnic National University (Lviv, 1990); Russian-Ukrainian Scientific and Technical Dictionary by V. Perkhach, B. Kinash (Lviv, 1997); Russian-Ukrainian Explanatory Thermal Power Dictionary edited by Ya. Mysak, M. Kruk (Lviv, 2001); Explanatory Russian-Ukrainian-English dictionary on Energy. Basic terms: over 3500 terms edited by А.А. Rudnik (Kharkiv, 1999); Ukrainian-Russian-English-French Explanatory Dictionary of Basic Terms in Power Engineering and Electrical Engineering edited by Ye.S. Yemelianova (Kharkiv, 2012) are analyzed. The research once again showed that modern series of terminology dictionaries should be supplemented by a narrow-sector electric power engineering dictionary of explanatory type. This will promote compliance with standards, unification of Ukrainian electric power engineering terminology, and will prevent divergences in existing normative documents.

PROSPECTS FOR SOLVING PROBLEMS OF POWERFUL ELECTROMAGNETIC FIELDS IN AGRICULTURE

2020 ◽  
Author(s):  
I.E. Rogov ◽  
◽  
L.N. Ananchenko ◽  
I.A Kasyanov ◽  
A.N. Bolotin ◽  
...  
Keyword(s):  
Electric Power ◽  
Electromagnetic Fields ◽  
Electromagnetic Compatibility ◽  
Electric Power Industry ◽  
Power Industry ◽  
Electromagnetic Environment ◽  
Energy Facility

The article deals with the problems of powerful electromagnetic fields and electromagnetic compatibility in the electric power industry. The purpose of the study is to analyze modern systems and methods for minimizing powerful electromagnetic fields in the electric power industry. The analysis of modern systems and assessment of the electromagnetic environment at the energy facility will make it possible to develop and implement upgrades that increase the security of the object.

scholarly journals Aspects of the concept of cyber-protected objects of a digital electrical network with elements of Zero Trust Architecture in Russia

2021 ◽  
Vol 288 ◽  
pp. 01032
Author(s):  
Vladimir Karantaev ◽  
Vladislav Karpenko
Keyword(s):  
Electric Power ◽  
Information And Communication Technologies ◽  
Electric Power Industry ◽  
Communication Technologies ◽  
Electrical Network ◽  
Practical Implementation ◽  
Industrial Control ◽  
Industrial Control Systems ◽  
Holistic Concept ◽  
Information And Communication

Modern trends in the development of the electric power industry declare the widespread use of information and communication technologies and digital services to improve the operation of relay protection and automation (RPA) subsystems, Industrial Control Systems (ICS), commercial electricity metering systems, etc. However, it is associated with an increase in the number of cyber threats and risks of disrupting the stable functioning of electric power facilities due to destructive information influences. The report presents aspects of a holistic concept of building cyber-protected digital substations with elements of Zero Trust Architecture. Based on the results of the theoretical investigation the authors assume the possibility of technical testing of the proposed approaches to build a cyber-protected digital substation as a part of the emerging Research and Development (R&D) programs for the practical implementation of the zero-trust policy.

scholarly journals ERRORS OF UNIVERSAL CONTACTLESS CONVERTERS OF MONITORING AND CONTROL SYSTEMS FROM EXTERNAL MAGNETIC FIELDS

2020 ◽  
Vol 2021 (1) ◽  
pp. 47-55
Author(s):  
A Plakhtiev ◽  
◽  
Gayratjon Gaziev ◽  
Yahyojon Meliboev ◽  
Odil Doniyorov
Keyword(s):  
Magnetic Fields ◽  
Electric Power ◽  
Control Systems ◽  
Smart Cities ◽  
Renewable Energy Sources ◽  
Relay Protection ◽  
Electric Power Industry ◽  
Power Industry ◽  
Railway Transport ◽  
And Control

In communication and communication devices, power equipment, relay protection and automation terminals, in the electric power industry of "smart" cities and homes, in industry, in railway transport, microprocessor-based relay protection and automation devices, distributed generation installations, including renewable energy sources, and electricity storage, as well as "intelligent" automated information and measurement systems are beginning to be used. Contactless converters of direct and alternating currents of control and control systems are widely used in them. Their disadvantages are a narrow range of controlled currents, large dimensions and weight. Therefore, it is important to eliminate them. The paper discusses the general principles of construction of contactless converters of large direct currents, the main requirements for them, and shows the results of the development of one of the options proposed by us, universal contactless magneto-modulation converters of large direct currents with an extended range for various control and control systems. They differ from the known ones by an extended controlled range with small dimensions and weight, and increased accuracy and sensitivity. The converter has a simple and technological design with low material consumption and cost, and can control large direct currents, as well as alternating currents, without contact. The paper considers the errors from external magnetic fields of universal contactless converters of control and control systems. It is shown that the error from the external magnetic field does not exceed 0.08% if the number of sections of the measuring winding is even and with their symmetrical arrangement, and with their even increase-the error decreases. At the same time, the developed contactless converters can be widely used in industry, metallurgy, railway transport, agriculture, water and farming, as well as in the electric power industry of “smart” cities and homes and for checking electric meters at the place of their installation.

scholarly journals THE USE OF FERROMAGNETIC AMORPHOUS MATERIALS 5BDSR IN HIGH-FREQUENCY OVERVOLTAGE PROTECTION DEVICES

2021 ◽  
Vol 11 (2) ◽  
pp. 77-84
Author(s):  
Sergey Korobeynikov ◽  
Valentin Loman
Keyword(s):  
Electric Power ◽  
High Frequency ◽  
Amorphous Materials ◽  
Skin Effect ◽  
Electric Power Industry ◽  
Ferromagnetic Material ◽  
Frequency Dependent ◽  
Anomalous Skin Effect ◽  
Protection Devices ◽  
Overvoltage Protection

The paper discusses the prospects of using nanocrystalline amorphous materials in the electric power industry. In particular, in the field of protection of electric power equipment of substations from high-frequency pulses. The effectiveness of using such materials to activate the anomalous skin effect in multilayer conductors is shown. The resulting conductors increase their resistance at lightning frequencies, thereby making it possible to create devices that effectively suppress high-frequency pulses. The authors give an example of a protective frequency-dependent device using nanocrystalline ferromagnetic material and the results of its use in trial operation. The paper shows the results of comparing round and flat frequency-dependent conductors.

Direct ammonia fueled solid oxide fuel cells: A comprehensive review on challenges, opportunities and future outlooks

2020 ◽  
pp. 70-91 ◽  
Author(s):  
Molla Asmare ◽  
Mustafa Ilbas
Keyword(s):  
Electric Power ◽  
Energy Demand ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
Performance Comparison ◽  
Optimum Operating ◽  
Practical Implementation ◽  
Human Society ◽  
Energy Access ◽  
Green Fuel

Nowadays, the most decisive challenges we are fronting are perfectly clean energy making for equitable and sustainable modern energy access, and battling the emerging alteration of the climate. This is because, carbon-rich fuels are the fundamental supply of utilized energy for strengthening human society, and it will be sustained in the near future. In connection with this, electrochemical technologies are an emerging and domineering tool for efficiently transforming the existing scarce fossil fuels and renewable energy sources into electric power with a trivial environmental impact. Compared with conventional power generation technologies, SOFC that operate at high temperature is emerging as a frontrunner to convert the fuels chemical energy into electric power and permits the deployment of varieties of fuels with negligible ecological destructions. According to this critical review, direct ammonia is obtained as a primary possible choice and price-effective green fuel for T-SOFCs. This is because T-SOFCs have higher volumetric power density, mechanically stable, and high thermal shocking resistance. Also, there is no sealing issue problem which is the chronic issues of the planar one. As a result, the toxicity of ammonia to use as a fuel is minimized if there may be a leakage during operation. It is portable and manageable that can be work everywhere when there is energy demand. Besides, manufacturing, onboard hydrogen deposition, and transportation infrastructure connected snags of hydrogen will be solved using ammonia. Ammonia is a low-priced carbon-neutral source of energy and has more stored volumetric energy compared with hydrogen. Yet, to utilize direct NH3 as a means of hydrogen carrier and an alternative green fuel in T-SOFCs practically determining the optimum operating temperatures, reactant flow rates, electrode porosities, pressure, the position of the anode, thickness and diameters of the tube are still requiring further improvement. Therefore, mathematical modeling ought to be developed to determine these parameters before planning for experimental work. Also, a performance comparison of AS, ES, and CS- T-SOFC powered with direct NH3 will be investigated and best-performed support will be carefully chosen for practical implementation and an experimental study will be conducted for verification based on optimum parameter values obtained from numerical modeling.

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