scholarly journals Numerical Analysis of a Spiral Tube Damping Busbar to Suppress VFTO in 1000 kV GIS

2019 ◽  
Vol 9 (23) ◽  
pp. 5076 ◽  
Author(s):  
Reem A. Almenweer ◽  
Yi-Xin Su ◽  
Wu Xixiu
Keyword(s):  
Structural Characteristics ◽  
Electrical Equipment ◽  
Power Networks ◽  
Spiral Tube ◽  
Electric Power Networks ◽  
In Series ◽  
Sf6 Discharge ◽  
Design Characteristics ◽  
Transmission And Distribution ◽  
Transient Overvoltage

Gas insulated substations (GISs) are broadly used for transmission and distribution in electric power networks. Very fast transient overvoltage (VFTO) caused by SF6 discharge during switching operations in a GIS may threaten the insulation of electrical equipment. In this paper, a novel VFTO suppression method with great prospects in engineering, called the spiral tube damping busbar, is proposed. The suppressing mechanism of the new method is analyzed. The structure and the design characteristics of the damping busbar are introduced as well. Moreover, a calculation method for the self-inductance of the damping busbar at high frequency is presented. According to the structural characteristics of the damping busbar, the inductance effect on suppressing VFTO is analyzed. A further improvement in damping VFTO is investigated by designing a spiral litz coil connected in series with the busbar, which increases the damping effect. The simulation results show that the improved damping busbar has a significant suppressing effect on the amplitude and the frequency of VFTO.

scholarly journals ANALYSIS OF SUBSYNCHRONOUS RESONANCE EFFECT IN SERIES COMPENSATED LINE WITH BOOSTER TRANSFORMER

2013 ◽  
pp. 59-63
Author(s):  
G.V. RAJASEKHAR ◽  
GVSSNS SARMA
Keyword(s):  
Resonance Effect ◽  
Power Networks ◽  
Turbine Generator ◽  
Subsynchronous Resonance ◽  
Three Phase ◽  
Electric Power Networks ◽  
In Series ◽  
Negative Damping ◽  
Series Capacitor Compensation ◽  
Series Capacitor

Series compensation has been successfully employed for many years in electric power networks. Series capacitor compensation has a tendency to act as a negative damping on torsional vibrations of nearby turbine generator units. However, their presence in the system may lead to the Sub-synchronous resonance (SSR) phenomenon especially for the nearby generating plants that have a direct or a near radial connection to series capacitor compensated line. In an attempt to analyze the SSR phenomenon, analysis has been done on Second Benchmark model system using both frequency analysis and eigenvalue techniques with three phase fault for different compensation levels. This analysis has been carried out using Matlab control system toolbox.

scholarly journals Modern trends of the world market of electrical equipment

2021 ◽  
pp. 5-9
Author(s):  
Tetiana AVERIKHINA ◽  
Maryna BURIACHENKO ◽  
Valeriia VASYLIEVA
Keyword(s):  
Renewable Energy ◽  
Smart Grid ◽  
Distribution System ◽  
Distribution Systems ◽  
Renewable Energy Sources ◽  
Electrical Equipment ◽  
World Market ◽  
Global Market ◽  
The World ◽  
Transmission And Distribution

Introduction. The world market of electrical equipment is developing very fast. There are many companies in the market that sell electrical equipment, among them there are companies that occupy leading positions. Today, the world market of energy engineering is estimated at 87 billion dollars per year, based on the structural dynamics of growth, the annual volume can reach 110-115 billion dollars per year until 2025. The global market for energy equipment service in 2020 is 31.7 billion dollars, including: LTSA (long-term service) 47 %, modernization – 20 %, field service – 24 %, engineering – 9 %. The purpose of the paper is to analyze the world market of electrical equipment, determine sales, business growth. The list of leaders in electrical equipment on the world market is considered. Results. The main trends in the world today are the following areas: development of DC transmission system, cable lines for underwater laying and cable for connections of renewable energy sources to reduce energy transmission costs through the capabilities of existing transmission lines, through network voltages and innovative design solutions and installation methods. The amendment for these trends shows us the world leaders in the electrical market, such as Legrand, Schneider Electric, ABB, Siemens, DEKraft, SASSIN, EKF, etc., R&D costs are 3.5–5 % of profits (over 60 years). Thus, we can conclude that the global market for cable networks is developing rapidly. This market is expected to grow in the development of smart grid technologies, renewable energy generation and initiatives to modernize the transmission and distribution system. Conclusion. That the global cable ladder market is developing rapidly. This market is expected to grow in the development of smart grid technologies, renewable energy cultivation and government initiatives to modernize transmission and distribution systems.

SERIEL SIMULATORS OF DYNAMIC NETWOORK OBJECTS WITH DISTRIBUTED PARAMETER

2020 ◽  
pp. 60-68
Author(s):  
Minzorov Oleksandr ◽  
Keyword(s):  
Road Transport ◽  
Transport Systems ◽  
Network Dynamic ◽  
Power Networks ◽  
Electrical Systems ◽  
Electronic Circuitry ◽  
Distributed Parameters ◽  
Electric Power Networks ◽  
Equipment Modernization ◽  
Dynamic Objects

Mining engineering networks, road transport systems, electric power networks, electronic circuitry, circulatory, respiratory, endocrine and other internal systems of people and other living beings, hydraulic and hydro-electrical systems, aeromechanics, gas dynamics and many other networks in the fields of physics, chemistry, transport, mathematics, biology, economics and other fields of science belong to the network dynamic objects with distributed parameters, which is a class of complex dynamic systems (VTS), which give rise to many different problems and problems with large amounts of data using computer parallel modeling. Technological and technical schemes of different subject areas and different complexities, secondary topologies of technological and technical objects with distributed parameters can also be presented as graphs with appropriate physical and mathematical interpretations of branches and nodes. Technological importance and technical complexity of network dynamic objects with distributed parameters (MDORP) determine the urgency of the problems of active model support (Model Drive Engineering, MDE) of industry innovative projects for building technological schemes, automation of dynamic process control in enterprises, development of simulators for staff simulators for narrow specialties, guaranteeing safe operation of complex and expensive equipment, modernization within the requirements for compliance with the level of objects of Industry 4.0, which can be represented in the form of network dynamic objects with distributed parameters. The article is a contribution to the solution of MDE-problem: the technique of construction of consecutive MDORP simulators on the basis of Block-oriented-language (BOlanguage) of modeling is developed, the method of interactive computer support of development of simulators for objects of real industrial complexity is offered. In the article the part of real technical topology is considered, realized and investigated, and results will be used at creation of parallel simulators.

scholarly journals Ontologization of tools for modeling and synthesis technological process trajectories

2020 ◽  
Vol 157 ◽  
pp. 04032
Author(s):  
Vasily Mokhov ◽  
Danil Shaykhutdinov ◽  
Evgeniy Kirievskiy ◽  
Alexander Vlasov ◽  
Nikolay Gorbatenko
Keyword(s):  
Subject Area ◽  
Power Networks ◽  
Intelligent Modeling ◽  
Technological Chain ◽  
Transformer Substation ◽  
Digital Substation ◽  
Electric Power Networks ◽  
The Subject ◽  
Ontological Model ◽  
Upper Level

The publication is devoted to the development of an ontological model of tools for intelligent modeling and synthesis of the trajectories of technological processes in electric power networks. Development includes two levels of modeling: the level of metaontology and the level of applied ontologies. At the upper level, the structure of the upper level is proposed and described. At the level of applied ontologies, the ontology of the “digital substation - distribution network” system and the structure for the ontology of tasks are detailed. The first is implemented and presented in the Protégé framework environment. The second is presented descriptively by the example of the task of minimizing energy losses at the level of a transformer substation with an illustration of a functional diagram of the technological chain of its solution. The findings of the work reflect the potential of using the proposed solution to prepare an integrated knowledge management system in the subject area.

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