scholarly journals EXPERIMENTAL STUDY OF THE POSSIBILITY TO SINGLE OUT THE MODE OF SINGLE-PHASE CLOSURE TO THE GROUND IN THE CIRCUIT 6– 10 kV BY THE INTELLIGENCE SYSTEM OF ELECTRICITY METERING

2020 ◽  
pp. 5-15
Author(s):  
Ainur F. Abdullazyanov ◽  
Alexander I. Fedotov ◽  
Marat N. Khabibullin ◽  
Linar I. Abdullin ◽  
Georgii V. Vagapov
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Distribution Systems ◽  
Single Phase ◽  
Electric Power Systems ◽  
Electricity Supply ◽  
Electrical Networks ◽  
Electric Networks ◽  
Emergency Situations ◽  
Diagnostic Signs

The problem of increasing the reliability of electricity supply is relevant at the current stage of electric power systems development both in the territory of the Russian Federation and in foreign electric power systems. One of the ways to improve the reliability of electricity supply is to prevent the development of emergency situations on overhead power transmission lines as the most important components of electric power systems, which is confirmed by a substantial number of annual domestic and foreign publications. Preventing the development of emergency situations is largely facilitated by early detecting the signs of emergency modes onset in the functioning of all voltage classes’ electric networks. At the same time, the development of intelligence systems for technical and commercial electricity metering opens up new opportunities for monitoring numerous parameters of different operational modes of electrical networks, including those of 6-10-35 kV voltage with isolated neutral operation mode. Numerous works of author’s teams are devoted to the theoretical analysis of the possibility to early detect the diagnostic signs of emergency signals. However, existing publications do not always present the results of field experimental studies in existing electrical networks on the subject under consideration, which demonstrates some discrepancy between theoretical provisions and the possibility of their practical implementation. The present article attempts to assess the possibility of practical implementing the part of theoretical provisions on early detection of diagnostic signs for emergency regimes and, as a result, increase reliability of electricity supply. At the same time, the article presents the results of the field study the basis of which were used to open up current possibilities of early detecting the diagnostic signs of emergency regimes on the example of individual singling out higher harmonic components of currents and voltages, including when using already existing intelligence electricity metering systems installed in the existing electrical distribution systems with the voltage of 10 kV. At the same time, the article demonstrates implementability and further development of online monitoring of emergency modes in electric networks functioning on the example of identifying a single-phase ground fault, which makes it possible to significantly reduce the costs of temporary and material resources when localizing the single-phase closure zone.

scholarly journals Analysis of reliability of power supply of consumers in non-full-phase modes using adaptive models of their calculation

2019 ◽  
Vol 139 ◽  
pp. 01012
Author(s):  
T.N. Nasirov ◽  
V.A. Nepomnyashchiy ◽  
O.V. Radionova
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Power Supply ◽  
Adaptive Methods ◽  
Electric Power Systems ◽  
Electricity Supply ◽  
Electrical Networks ◽  
Adaptive Models

Reviewed and analyzed issues related to the reliability of electricity supply in non-full-phase modes of electrical networks, to calculate which use adaptive methods, is built on one Central principle of modeling the modes of electric power systems (EPS). Special attention is paid to the calculation of damages from no full provided of electricity in non-full-phase modes.

scholarly journals DIGITAL MODELS OF DISTRIBUTION ELECTRIC NETWORK OF IRAQ

2020 ◽  
Vol 2020 (1) ◽  
pp. 187-188
Author(s):  
Fadel Bassam ◽  
Andrey Kryukov
Keyword(s):  
Smart Grid ◽  
Power Systems ◽  
Electric Power ◽  
Electric Power Industry ◽  
Electric Power Systems ◽  
Power Industry ◽  
Electrical Networks ◽  
Digital Models ◽  
Electric Networks ◽  
Phase Coordinates

The restoration and development of Iraq's electric power industry is planned to be carried out on the basis of the concept of intelligent electric networks (smart grid). To implement this concept, it is necessary to create integrated digital models of electrical networks. Such models can be implemented on the basis of methods and tools for modeling electric power systems in phase coordinates. The report presents the results of modeling normal and emergency modes of distribution electric networks of 11 kV.

Intelligent electrical networks: computer support for dispatching solutions

2021 ◽  
Author(s):  
Yuriy Lyubarskiy ◽  
Aleksandr Hrennikov
Keyword(s):  
Power Systems ◽  
Intelligent Systems ◽  
Distribution Networks ◽  
Computer Support ◽  
Federal State ◽  
Electrical Networks ◽  
Electric Networks ◽  
Emergency Situations ◽  
Intelligent Software ◽  
State Educational

For" smart " electric networks, intelligent software tools that perform new functions and increase the level of computer support for dispatching solutions are considered. Given that one of the goals of building "smart" networks is to ensure recovery after accidents, the main focus of the textbook is on the problems of diagnosing emergency situations, intelligent monitoring of the state of electrical networks, and planning for the post-accident restoration of power supply. A new type of software simulator for dispatchers of electrical networks — a simulator for analyzing emergency situations-is considered in detail. The theoretical material is accompanied by many examples in the form of protocols for the operation of real intelligent systems. Meets the requirements of the federal state educational standards of higher education of the latest generation. For students of electric power specialties, managers and specialists of operational services of enterprises of power systems, electric and distribution networks and power stations, branches of PJSC ROSSETI, PJSC FGC UES, as well as students of advanced training courses.

scholarly journals ON THE SIMULATION OF MODES ОF ELECTRIC POWER SYSTEMS WITH FACTS

2017 ◽  
Vol 60 (4) ◽  
pp. 341-351
Author(s):  
E. D. Halilov
Keyword(s):  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Power Flow ◽  
Power Transmission ◽  
Electric Power Systems ◽  
Active Power ◽  
Operating Conditions ◽  
Electrical Networks ◽  
Facts Devices

Power flow control is an important task of development of electric power systems. It is necessary to reduce the power loss, improve the reliability and quality of power supply and increase the power transmission. Currently, on the basis of modern power electronics effective FАСТS devices for flexible control of power system operation modes have been developed. FАСТS devices are able to simultaneously influence the voltage, the reactance, the angle between the voltages. As it is known, the calculations of the established modes of electric systems are the most frequently performed tasks at all the territorial and time levels of control and planning operations. These calculations are significant by themselves, being also an integral part of software systems of calculation of losses of power and energy in electrical networks, calculation of optimal modes and also sustainability. The need for multiple mode calculation imposes high requirements to the methods of calculation of the established modes in real time in terms of performance and reliability of the results of the solution being obtained under operating conditions of electric power systems. In traditional calculations of the established modes of electrical networks, shunt reactors, current-limiting reactors, capacitor banks, longitudinal compensation devices were accounted in the simulation as passive elements. In regard with the introduction of FACTS devices in power systems, there is an arising need to develop appropriate algorithms and implement them in the form of software for analyzing and controlling the established modes of power systems. The methodology and software for calculation of the established modes of electric networks with consideration of FACTS devices have been developed. The software makes it possible to obtain practically acceptable solutions in three outer iterations. Based on the results of numerical simulation of modes of the power system of the “Azerenergy” JSC it was determined that the application of FACTS devices can significantly increase the transmission line active power, improve voltage levels and reduce losses of active power. The dependences of flows and power losses on the control parameter of FACTS devices have been derived. 

scholarly journals Evaluation of the vulnerability in water distribution systems through targeted attacks

2021 ◽  
Author(s):  
Aiman Albarakati ◽  
Asifa Tassaddiq ◽  
Yogesh Kale
Keyword(s):  
Power Systems ◽  
Water Supply ◽  
Electric Power ◽  
Distribution Systems ◽  
Water Distribution ◽  
Electric Power Systems ◽  
Optimization Techniques ◽  
Centrality Measures ◽  
Topological Features ◽  
Vulnerability Framework

Abstract This paper presents the results of a vulnerability analysis in different water distribution system (WDS) benchmarks, performed under a framework based on a graph model that integrates topological features and hydraulic characteristics, allowing the comparison between different attack strategies and centrality measures in terms of their ability to predict the shortage of water supply. This vulnerability framework has been previously applied to electric power systems and it employs a vulnerability prediction measure to quantify the amount of damage caused in terms of the physical damage measure. Different attack strategies and centrality measures were applied to four WDS benchmarks: the New York Tunnel, the Hanoi, the Modena, and the Balerma networks. It was determined that removing the most central element and recalculating the centrality for each stage are the most damaging attack strategy. Degree, eigenvector, and Katz centrality measures presented the best performance to predict the elements that are more relevant to the network and can cause a larger impact on the water supply. It was demonstrated that the vulnerability framework can be applied to the WDS in the same way it was previously applied to electric power systems. Future work will be oriented to the design of the WDS using optimization techniques to minimize the vulnerability of the network under faults that can be generated by droughts and other extreme weather conditions.

A Fault Phase Selection Method Based on Arc Voltages for High-Voltage Line Protections in Electric Power Systems

2013 ◽  
Vol 676 ◽  
pp. 218-221
Author(s):  
Xiao Hui Zeng ◽  
Yong Hui Chen ◽  
Gong Quan Tan
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
High Voltage ◽  
Single Phase ◽  
Electric Power Systems ◽  
Selection Method ◽  
Phase Selection ◽  
Arc Voltage ◽  
Sequence Components ◽  
Simulation Results

A fault phase selection method is proposed based on arc voltage after analysis of inadequate of fault phase selector existed in the paper. A precise fault phase selection can be achieved by using arc voltages in conjunction with phase current differences and sequence components of currents. The method proposed can solve false tripping problems in transmission line protections when single phase to ground faults occur with great reliabilities. Simulation results show that the method can identify faulted phase or phases correctly and effectively.

The Software Design for an Automation Intelligent Distribution Terminal Unit in Electric Power Systems Based on C and Assembly Language

2013 ◽  
Vol 676 ◽  
pp. 302-305
Author(s):  
Hong Song ◽  
Xiao Hui Zeng ◽  
Wei Peng Zhou
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Power Distribution ◽  
Distribution Systems ◽  
Assembly Language ◽  
Electric Power Systems ◽  
Power Distribution Systems ◽  
Terminal Unit ◽  
Electric Power Distribution ◽  
Intelligent Distribution

Electric power distribution systems play an important role in electric power systems, in which automation intelligent distribution terminal units are critical for the performance of power distribution systems. The software of an automation intelligent electric power distribution terminal unit based on digital signal processor is designed in the paper, a way of admixture programming with C language and assembly language. In this manner, real-time requirement on the electric power distribution system will be satisfied, the reliability and stability of the software are ensured as while. It has a broad application prospects in electric power systems.

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