scholarly journals Basic Principles of Electrical Network Reliability Optimization in Liberalised Electricity Market

2008 ◽  
Vol 45 (4) ◽  
pp. 3-13
Author(s):  
I. Oleinikova ◽  
Z. Krishans ◽  
A. Mutule
Keyword(s):  
Electricity Market ◽  
Information Technologies ◽  
Network Reliability ◽  
Development Planning ◽  
Electrical Network ◽  
Reliability Optimization ◽  
Electrical Networks ◽  
Network Development ◽  
Basic Principles ◽  
Stage Of Development

Basic Principles of Electrical Network Reliability Optimization in Liberalised Electricity MarketThe authors propose to select long-term solutions to the reliability problems of electrical networks in the stage of development planning. The guide lines or basic principles of such optimization are: 1) its dynamical nature; 2) development sustainability; 3) integrated solution of the problems of network development and electricity supply reliability; 4) consideration of information uncertainty; 5) concurrent consideration of the network and generation development problems; 6) application of specialized information technologies; 7) definition of requirements for independent electricity producers. In the article, the major aspects of liberalized electricity market, its functions and tasks are reviewed, with emphasis placed on the optimization of electrical network development as a significant component of sustainable management of power systems.

Important Terms And Conditions Of Marriage Agreement In Islamic Law

2020 ◽  
Vol 02 (11) ◽  
pp. 36-48
Author(s):  
Nigora Yusupova ◽  
Keyword(s):  
Islamic Law ◽  
Family Relations ◽  
Basic Principles ◽  
Religious Literacy ◽  
Relevant Today ◽  
Cultural Foundations ◽  
Stage Of Development ◽  
Scientific Analysis ◽  
Organizational Features ◽  
Comprehensive Study

Today, a comprehensive study of social aspects, cultural and spiritual, as well as socio-economic, legal, educational and organizational features of family relations is one of the questions of the hour. The relevance of the issue is that, first of all, at the present stage of development of our society, it is socially necessary to conduct a scientific analysis of the Islamic doctrine regarding family relations in the process of increasing the spirituality of the Uzbek people, including religious literacy. Secondly, when analyzing and studying the basic principles of Sharia norms, it is necessary to correctly use this knowledge in the search for solutions to issues, reasons, and the nature of growing family divorces, which is very relevant today. In this regard, this article highlights the essence and characteristics, as well as the socio-economic, spiritual and cultural foundations of the conditions and obstacles to marriage, in Islamic teachings, which were considered in the region as traditions. The article also examines and comparatively analyzes the religious, spiritual, legal, economic and educational factors of the conditions of marriage: free mutual consent to marriage, participation of witnesses in marriage, equality, makhr; circumstances that prevent marriage: a ban on marriage between relatives, issues of marriageable age under Islamic law with the norms of family law.

scholarly journals Optimal feeder reconfiguration in distributed generation environment under time-varying loading condition

2021 ◽  
Vol 3 (6) ◽  
Author(s):  
Yanrenthung Odyuo ◽  
Dipu Sarkar ◽  
Lilika Sumi
Keyword(s):  
Graph Theory ◽  
Distributed Generation ◽  
Spanning Tree ◽  
Voltage Stability ◽  
Electrical Network ◽  
List Type ◽  
Network Reconfiguration ◽  
Time Varying ◽  
Electrical Networks ◽  
Tree Algorithm

Abstract The development and planning of optimal network reconfiguration strategies for electrical networks is greatly improved with proper application of graph theory techniques. This paper investigates the application of Kruskal's maximal spanning tree algorithm in finding the optimal radial networks for different loading scenarios from an interconnected meshed electrical network integrated with distributed generation (DG). The work is done with an objective to assess the prowess of Kruskal's algorithm to compute, obtain or derive an optimal radial network (optimal maximal spanning tree) that gives improved voltage stability and highest loss minimization from among all the possible radial networks obtainable from the DG-integrated mesh network for different time-varying loading scenarios. The proposed technique has been demonstrated on a multiple test systems considering time-varying load levels to investigate the performance and effectiveness of the suggested method. For interconnected electrical networks with the presence of distributed generation, it was found that application of Kruskal's algorithm quickly computes optimal radial configurations that gives the least amount of power losses and better voltage stability even under varying load conditions. Article Highlights Investigated network reconfiguration strategies for electrical networks with the presence of Distributed Generation for time-varying loading conditions. Investigated the application of graph theory techniques in electrical networks for developing and planning reconfiguration strategies. Applied Kruskal’s maximal spanning tree algorithm to obtain the optimal radial electrical networks for different loading scenarios from DG-integrated meshed electrical network.

scholarly journals Predicting the influence of the non-sinusoidal network mode on power transformers

2019 ◽  
Vol 114 ◽  
pp. 04005
Author(s):  
Ngo Van Cuong ◽  
Lidiia I. Kovernikova
Keyword(s):  
Service Life ◽  
Electric Power ◽  
Power Quality ◽  
Electrical Equipment ◽  
Operating Conditions ◽  
Transformer Oil ◽  
Power Transformers ◽  
Electrical Network ◽  
Electrical Networks ◽  
Current Harmonics

The parameters of electrical network modes often do not meet the requirements of Russian GOST 32144-2013 and the guidelines of Vietnam. In the actual operating conditions while there is the non-sinusoidal mode in electrical networks voltage and current harmonics are present. Harmonics result in overheating and damage of power transformers since they cause additional active power losses. Additional losses lead to the additional heat release, accelerating the process of insulating paper, transformer oil and magnetic structure deterioration consequently shortening the service life of a power transformer. In this regard there arises a need to develop certain scientific methods that would help demonstrate that low power quality, for instance could lead to a decrease in the electrical equipment service life. Currently we see a development of automated systems for continuous monitoring of power quality indices and mode parameters of electrical networks. These systems could be supplemented by characteristics calculating programs that give out a warning upon detection of the adverse influence of voltage and current harmonics on various electrical equipment of both electric power providers and electric power consumers. A software program presented in the article may be used to predict the influence of voltage and current harmonics on power transformers.

Study of the influence of overvoltage on the quality of electricity in energy systems.

2020 ◽  
Vol 23 (2) ◽  
pp. 52-58
Author(s):  
S. SKRYPNYK ◽  
Keyword(s):  
Power Supply ◽  
Fire Hazard ◽  
Lightning Discharge ◽  
Quality Standard ◽  
Normal Operation ◽  
Electrical Network ◽  
Modern World ◽  
Electrical Networks ◽  
The World

Our world with its high technologies has long been deeply dependent on the quality of electricity supply. In most countries of the world there are national power grids that combine the entire set of generating capacity and loads. This network provides the operation of household appliances, lighting, heating, refrigeration, air conditioning and transport, as well as the functioning of the state apparatus, industry, finance, trade, health services and utilities across the country. Without this utility, namely electricity, the modern world simply could not live at its current pace. Sophisticated technological improvements are firmly rooted in our lives and workplaces, and with the advent of e-commerce began the process of continuous transformation of the way individuals interact with the rest of the world. But with the achievement of intelligent technologies, an uninterrupted power supply is required, the parameters of which exactly meet the established standards. These standards maintain our energy security and create a reliable power system, that is maintaining the system in a trouble-free state. Overvoltage is the deviation of the rated voltage from the value of the corresponding quality standard (frequency, sinusoidal voltage and compliance of harmonics). Overvoltage in terms of fire hazard is one of the most dangerous emergency modes of electrical equipment, which causes conditions that in most cases are sufficient for the occurrence of fire hazards (exceeding the allowable voltage leads to disruption of normal operation or possible ignition). Against the background of deteriorating engineering systems, increased power consumption and poor maintenance, power supply of electrical installations, the main causes of overvoltage in electrical networks are thunderstorms (atmospheric overvoltage), switching switches, uneven phase load in electrical networks, etc. The physical picture of internal overvoltage is due to oscillatory transients from the initial to the established voltage distributions in the conductive sections due to the different situation in the electrical circuit. In the conditions of operation of electric networks planned, mode or emergency situations are possible. Therefore, the ranges of overvoltage are determined by the range from several hundred volts to tens and hundreds of kilovolts, and depend on the types of overvoltage. Atmospheric overvoltage is considered to be one of the most dangerous types of emergency modes of operation of the electrical network. This overvoltage occurs as a result of lightning discharge during precipitation by concentrating electricity on the surface of the object, the introduction of potential through engineering networks and

scholarly journals State and Prospects of Using Computer Technologies in Accounting and Analytical Work of Ukrainian Enterprises

2020 ◽  
pp. 22-29
Author(s):  
Deniza Dolbneva ◽  
◽  
Tetiana Spodaryk ◽  
Keyword(s):  
Information Technologies ◽  
Computer Programs ◽  
Remote Work ◽  
Analytical Process ◽  
Current Accounting ◽  
Software Products ◽  
Modern Computer ◽  
Stage Of Development ◽  
Computer Technologies ◽  
Analytical Work

Globalized information has become one of the most important factors in increasing the productivity of an enterprise, and information technologies are a prerequisite for its effective functioning. The purpose of the article is to assess the state and determine the prospects for the development of the use of computer technologies in the accounting and analytical work of Ukrainian enterprises. The main aspects of the introduction and use of modern computer technologies in the accounting and analytical work of enterprises were investigated. The phenomenon of computerization of accounting was highlighted as one of the most important areas of increasing the efficiency of enterprises in modern market conditions, largely due to the processes of economic and digital globalization. A comprehensive assessment of existing accounting software products was carried out, the main functional capabilities of computer programs for conducting accounting and analytical work of enterprises were analyzed and their average cost of implementation was determined. It was determined that the automation of the accounting and analytical process allows the enterprise to save its own resources and to receive benefits. Among these are saving time, making tasks more efficient, and having more accurate analytics. Other than these, however, reducing costs is one of the significant benefits that companies and accounting firms experience as they embrace the latest technologies to optimize processes. Considerable attention is paid to the list of software requirements for automation of accounting, analysis and audit of enterprises. A number of main problems faced by enterprises at the stage of development, use and implementation of computer programs in the accounting and analytical process have been identified. The trends and prospects for the use of software in the accounting and analytical work of Ukrainian enterprises were determined. Current accounting trends tell us one thing: digitization is as ubiquitous in the accounting sector as it is anywhere else, but human roles remain just as relevant. Another development that will define accounting practice in the future is the growing acceptance of remote work in the field.

scholarly journals Calculations, norming and reducing of electrical energy losses in city electrical networks

2019 ◽  
Vol 21 (3) ◽  
pp. 46-54
Author(s):  
A. V. Lykin ◽  
E. A. Utkin
Keyword(s):  
High Voltage ◽  
Power Transmission ◽  
Low Voltage ◽  
Demand Curve ◽  
Electrical Energy ◽  
Electrical Network ◽  
Energy Losses ◽  
Capital Investments ◽  
Electrical Networks

The article considers the feasibility of changing the structure of a distribution electrical network by transferring points of electricity transformation as close to consumers as possible. This approach is based on installation of pole-mounted transformer substations (PMTS) near consumer groups and changes the topology of the electrical network. At the same time, for groups of consumers, the configuration of sections of the low-voltage network, including service drops, changes. The efficiency of approaching transformer substations to consumers was estimated by the reduction in electrical energy losses due to the expansion of the high-voltage network. The calculation of electrical losses was carried out according to twenty-four hour consumer demand curve. To estimate the power losses in each section of the electrical network of high and low voltage, the calculated expressions were obtained. For the considered example, the electrical energy losses in the whole network with a modified topology is reduced by about two times, while in a high-voltage network with the same transmitted power, the losses are reduced to a practically insignificant level, and in installed PMTS transformers they increase mainly due to the rise in total idle losses. The payback period of additional capital investments in option with modified topology will be significantly greater if payback is assessed only by saving losses cost. Consequently, the determination of the feasibility of applying this approach should be carried out taking into account such factors as increasing the reliability of electricity supply, improving the quality of electricity, and increasing the power transmission capacity of the main part of electrical network.

scholarly journals CONDITION AND MAIN DIRECTIONS OF DIGITAL ECONOMY DEVELOPMENT IN AGRICULTURAL ECONOMY OF RUSSIA

2019 ◽  
Vol 14 (1) ◽  
pp. 107-112 ◽  
Author(s):  
Петр Акмаров ◽  
Petr Akmarov ◽  
Миршарип Газетдинов ◽  
Mirsharip Gazetdinov ◽  
Ольга Князева ◽  
...  
Keyword(s):  
Rural Areas ◽  
Information Technologies ◽  
Agricultural Sector ◽  
Digital Economy ◽  
Regional Differentiation ◽  
Industrial Complex ◽  
Global Trends ◽  
Innovative Technologies ◽  
Stage Of Development ◽  
The Government

The description of the main characteristics of the modern stage of development of information technology and global trends in digitalization is given. A brief information is given on the state of informatization in Russia as a whole, as well as in the country’s agriculture. A comparative analysis of the level of digitalization in rural areas and urban districts is given, the main reasons for the differences are highlighted. The necessity of information technologies development in the agricultural sector of the economy, as a factor in ensuring the country’s food security and a factor in the competitiveness of domestic agricultural products, is substantiated. The features of intellectual agriculture, its benefits for producers and for the population are shown. The dynamics of innovative technologies development is given based on the digital economy in recent years with the release of lagging branches of the agro-industrial complex. The regional differentiation of digitalization of the economy among the population is shown, the interrelation of the informatization level of the population with the development of innovative technologies in the economy of the region is shown. Using the example of cellular communication development, the convergence of digitalization level in cities and villages of the country has been proved. The main problems hindering the information technologies development in agriculture and new solutions adopted at the level of the President and the Government of Russia on the development of informatization are highlighted. The most promising areas of agricultural transformation are shown, focused on the digitization of various aspects of the industry and infrastructure production and sales.

scholarly journals Technological video survaillance as protective tool of smart electricity meters from unauthorized access

2020 ◽  
Vol 2020 (2) ◽  
pp. 7-13
Author(s):  
Oxana Garifullaevna Koispaeva ◽  
Sergey Vladimirovich Golovko ◽  
Maksim Almansurovich Nadeev
Keyword(s):  
Video Surveillance ◽  
Surveillance System ◽  
Information Technologies ◽  
Video Recording ◽  
Video Stream ◽  
Recording System ◽  
Economic Feasibility ◽  
Electrical Networks ◽  
New Information ◽  
Different Types

The article touches upon the problems of interference in the electricity metering system and different types of electricity loss underestimation. It has been stated that in modern conditions the only effective way to identify and prevent violations is to install a remote electricity meter at the borderline of balance and operational responsibilities. РиМ 384.02 smart electricity meter is considered as an example. A picture of the device is presented and its main positive characteristics are listed. It has been proposed to introduce the twenty-four-hour video surveillance and video recording system into an expensive smart electricity meter in order to maintain the integrity and operability of the device. Video stream processing by means of machine vision and machine learning has been proposed. The economic feasibility of digitalization of the technological video surveillance system is being substantiated. The need of optimization of the electrical networks, the improvement of electricity metering system and of introducing the new information technologies in energy sales has been substantiated

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