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Topic: Electrical network


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In the News (Fri 19 Oct 18)

  
  Electrical network - Wikipedia, the free encyclopedia
An electrical network is an interconnection of electrical elements such as resistors, inductors, capacitors, diodes, switches and transistors.
The goal when designing electrical networks for signal processing is to apply a predefined operation on potential differences (measured in volts) or currents (measured in amperes).
Typical functions for these electrical networks are amplification, oscillation and analog linear algorithmic operations such as addition, subtraction, multiplication, division, differentiation and integration.
en.wikipedia.org /wiki/Electrical_network   (778 words)

  
 Electrical network Info - Encyclopedia WikiWhat.com
An electrical network or electrical circuit is an interconnection of analog electrical elements such as resistors, inductors, capacitors, diodes, switches and transistors.
A network is a connection of 2 or more simple circuit elements, and may not be a circuit.
The goal when designing electrical networks for signal processing is to apply a predefined operation on potential differences (measured in volts) or currentss (measured in amperes).
www.wikiwhat.com /encyclopedia/e/el/electrical_network.html   (691 words)

  
 Network - Wikipedia, the free encyclopedia
Transport network, facilities on which people and goods move.
Transportation network (graph theory), representations of transport networks for analysis
Network theory, the applied mathematics counterpart of graph theory
en.wikipedia.org /wiki/Network   (150 words)

  
 PB Network | Issue 53 | Migrating Electrical Power Network SCADA Systems to TCP/IP and Ethernet Networking
A traditional SCADA network guarantees that a communication path that is always there and that transmission delay and variations are very small, but the technology is becoming obsolete and unsuited to today’s power system operations.
Electricity utilities may wish to develop TCP/IP networking capability, such as the one shown in Figure 1, to support their power system operation and administrative functions.
Electricity utilities are encouraged to test the performance of their detailed design proposals to verify the QoS configuration can deliver the required performance characteristics and that they have full confidence in the concept before it is implemented network wide.
www.pbworld.com /news_events/publications/network/tools/print_article.asp?referrer=/news_events/publications/network/issue_53/53_21_MakK_MigratingTCPIP.asp   (2357 words)

  
 Network routing
It follows directly that if a link is added to an electrical network and the same total current is carried then the energy dissipation is reduced: after all, the old flow pattern remains feasible for the new optimization problem.
As in the case of a queueing network, it is possible to define a shadow price for a link, but this now depends not just upon the traffic statistics for the link but also upon the shadow prices of adjacent other links within the network.
This indicates the importance of treating a network as a whole: the apparent local benefits of a capacity or routing change may be completely negated by adverse consequences elsewhere in the network.
www.statslab.cam.ac.uk /~frank/CP/CPREAD/nr.html   (2425 words)

  
 Application of GIS technology in electrical distribution network optimization
Electric utilities have a need to keep a comprehensive and accurate inventory of their physical assets, both as a part of normal service provision (extending the network, undertaking maintenance, etc.) and as a part of their obligation to inform third parties about their facilities.
The development of optimization and design procedures of electric distribution network is a parallel process with building database by Cadastral Office of the City of Zagreb, and therefore some other available examples of basic map databases are used for research purposes (see Figure 1).
Small area or spatial, forecasting is the prediction of both the amounts and locations of future electric load growth in a manner suitable for distribution planning which really means with geographic resolution adequate for planning a new distribution network or extensions to the existing one.
libraries.maine.edu /Spatial/gisweb/spatdb/egis/eg94210.html   (4017 words)

  
 Global Guerrillas: JOURNAL: Network Load and Cascading System Failure
Electrical networks are at the heart of modern economies -- which makes them a prime target for disruption by Global Guerrillas.
The load on a electrical network is tightly correlated with the propensity of the network to suffer system-wide cascades of failure.
This implies that electrical networks are at their most vulnerable during summer days (80% plus utilization), when the load is well within the range of cascade responses (electricity use is strongly seasonal).
globalguerrillas.typepad.com /globalguerrillas/2005/06/journal_network.html   (1131 words)

  
 ESRI News -- ArcNews Summer 2003 Issue -- Norwegian Electrical Consortium Brings GIS Online
Though relatively small in size and population, Norway is a highly industrialized Scandinavian nation, relying on an ever-increasing supply of electrical energy, even in the midst of the deregulation and subsequent consolidation of its electrical industry.
Because of the changing structure of the electrical market in Norway due to consolidation and acquisition, one of the greatest strengths that GIS has brought to the GeoNIS group is the ability to integrate a variety of data into one consistent database with minimum redundancy in the data.
Since electrical network development and subsequent database revisions are an ongoing process, the versioning feature of M&M's Designer is an important part of the GIS.
www.esri.com /news/arcnews/summer03articles/norwegian-electrical.html   (1399 words)

  
 SVG Interface for an Electrical Network Switching Training Aid
One-line diagrams are used extensively in the electric utility industry to show installed equipment (generators, transformers, busbars, circuit breakers) and interconnecting transmission and distribution networks.
network parameters) or are annotated to show calculated results shuch as results of a load flow, short circuit calculations and so on.
Much of the time and expense invested in training electrical network technicians in the area of power generation and distribution is given to teaching and testing the technician on his/her knowledge of standard electrical procedures.
www.svgopen.org /2003/paperAbstracts/SvgInterfaceElectricalSwitching.html   (773 words)

  
 BOWest Library - Electrical Circuit Theorems
Any linear voltage network which may be viewed from two terminals can be replaced by a voltage-source equivalent circuit comprising a single voltage source E and a single series impedance Z.
The voltage E is the open-circuit voltage between the two terminals and the impedance Z is the impedance of the network viewed from the terminals with all voltage sources replaced by their internal impedances.
In a linear network with multiple voltage sources, the current in any branch is the sum of the currents which would flow in that branch due to each voltage source acting alone with all other voltage sources replaced by their internal impedances.
www.bowest.com.au /library/theorems.html   (939 words)

  
 InformationWeek | Powerline Networking | Langa Letter: Powerline Networking Comes Of Age | January 13, 2003   (Site not responding. Last check: 2007-11-07)
This doesn't affect the wires' ability to carry power: The powerline network signals are in the 4- to 21-MHz range, enormously far away from the power grid's normal operating frequency of 50 hertz or 60 hertz.
First and foremost, like wireless networking (a form of radio), a powerline network requires no new cables or special wiring: Any building that has normal electrical service already is wired for powerline networking, with no need to snake cables through walls or under floors, and with no need for drilling or other structural work.
This means in most buildings, the powerline network data signals become unreadable at the point where the building connects to the regional power grid -- usually beneath the street or on a utility pole in front of the building.
www.informationweek.com /story/showArticle.jhtml?articleID=6500241&cid=RSSfeed_IWK_Authors   (1045 words)

  
 Electrical Engineering Department-->Courses
The static electric field: eletric field intensity vector, the curl and divergence, Gauss's law in differential and integral forms.
Theory of electromagnetic conversion from electrical to mechanical and inversely.
Elements of antennas, the electric and magnetic dipole, the halfwave antenna, elements of antenna array theory.
home.birzeit.edu /eng/enee/courses.htm   (2355 words)

  
 Moroccan Electrical Network: Rural households connected total 72% - Zawya.com | Middle East Business News
The rate of rural households connected to the national electrical network reached 72% at the end of 2004, said on Jan. 25 the Moroccan National Office of Electricity (NOE).
The network extension in rural areas is progressing according to plan and an investment program was devised and executed since 1996.
NOE plans to extend the electrical infrastructure in 2005 for 4,000 rural villages of 200,000 households and set up solar-energy compounds for an additional 22,000 households.
www.zawya.com /story.cfm?id=ZAWYA20050127130140   (398 words)

  
 Kant in the information age
In this electrical model the easiest way to model that (IMHO) is to to think of a blogger as a capicitor that is being charged.
As is well known in electrical engineering, this makes the blog a frequency dependent purely imaginary node in the resistance network.
However at the edges of the network the pulses are smeared out and you effectively see a net avarage direct current component (this is how the rectifier in a computers powersupply works).
rogierbrussee.blogspot.com /2005/04/anjo-anjewierden-comment-on-getting.html   (442 words)

  
 Operation and Maintenance for an All-Optical Transport Network
The new optical network only performs cross-connecting of multigigabit streams, whereas the electrical network is responsible for cross-connecting low to medium bit rate streams and generating the multigigabit streams.
This network enhancement provides a lot of benefits for network operators and users, such as efficient transport and routing of multigigabit streams, simple network adaptation to new or changing requirements, evolution from today s transport network, and reuse of existing infrastructure.
Taking into account the large traffic concentration within the optical network and therefore the severity of the fault increasing with the duration of the network unavailability, the latter disadvantage may not be too serious.
www.comsoc.org /ci1/private/1996/nov/Huber.html   (4605 words)

  
 Dummies::Protecting Your Home Network from Electrical Dangers   (Site not responding. Last check: 2007-11-07)
An electrical surge is a sudden spate of very high voltage that travels from the electric lines to your house and ultimately to your computer.
Large networks can be destroyed during a lightning storm, because the surge comes through the telephone lines, not the electrical lines.
The electric company doesn't know and doesn't care about the need for an orderly shutdown, and if the folks there did know or care, they couldn't do much to warn you about a power failure, giving you time to use the Shut Down command.
www.dummies.com /WileyCDA/DummiesArticle/id-2270.html   (955 words)

  
 Network Time Synchronization Project
However, in a tactical network subject to damage and repair, as well as a widely deployed real-time network such as the Defense Simulation Internet (DSI), manual configuration engineering is not acceptable.
A number of crafted algorithms are used to minimize excessive network traffic and insure a near-optimal client/server configuration.
PDF Revised from: Electrical Engineering Department Report 90-6-1, University of Delaware, June 1990, 103 pp.
www.eecis.udel.edu /~mills/ntp.html   (2015 words)

  
 ESRI News - Winter 2000/2001 ArcNews -- A Partnership Spatially Enables an Electrical Network
The system also had to compensate for the automatic adjustment of the electrical network relative to the digital cadastre each time a cadastral update was received.
To this end, the Energise Intranet was developed to provide staff with access to maps of the electrical network over any extent and at any scale.
Tools are provided to search the database, display or hide layers of information, identify both cultural and electrical features, and print the current display as a map.
www.esri.com /news/arcnews/winter0001articles/apartnership.html   (757 words)

  
 MetSurge Consulting
Electrical protection is the backbone if any electrical network, an efficient network reduces downtime and protects equipment attached to the network.
With metering the load of the network and the application of our recommendations can be analysed, the operational cost can be reduced by improving the power factor and diversity.
Network analysis, fault level calculations and grading of the relays.
metsurge.bravepages.com   (425 words)

  
 Gulf Region Division
For Sadr City, a whole new electric network will soon be a reality -- part of a $106 million investment in that community that will impact 1.2 million residents there.
In addition, approximately 5 kilometers of 33 kV cable will be laid from Jameela to Tharwa C (referred to as the New Baghdad Substation) to provide a new feeder line for electricity to the community at a cost of $879,835.
Much of the municipal power is unreliable as the current network features distribution feeders that are in poor condition, conductors that are outdated and undersized, and an overall lack of capacity.
www.grd.usace.army.mil /news/releases/recon090305.html   (820 words)

  
 Gulf Region Division
The objective of the system is to improve the operation and reliability of the electrical network’s communications and Supervisory Control and Data Acquisition, or SCADA, systems.
Its function is to analyze national network weak points and improve the network structure, which will mean fewer and shorter interruptions and optimize power generation through better energy management.
This project also includes new technology, an Electrical Network Communications system, based on fiber optic cable embedded in the ground wire for the 400Kv and 132Kv transmission system.
www.grd.usace.army.mil /news/releases/recon1013006.html   (753 words)

  
 econtractors - the total electrical solutions network
One name to remember for all your electrical solutions...econtractors.
econtractors provide total electrical solutions in an environment where quality, craftsmanship, safety and productivity are unified.
Welcome to the next generation of electrical solutions: econtractors.
www.econtractors.com   (64 words)

  
 [No title]   (Site not responding. Last check: 2007-11-07)
GE Network Solutions, a leading supplier of innovative technology solutions to the utilities industry, today announced that Country Energy, Australia’s largest regional energy business, has selected the ENMAC distribution management system and the Smallworld Core Spatial Technology software from GE Network Solutions to manage the operations of its extensive electrical network.
Our aim is to establish a ‘virtual control room’ to manage Country Energy’s electrical network which covers an area of 573,000 square km.
Its electricity network covers more than 72% of New South Wales and parts of southern Queensland, making it one of the largest electricity networks in Australia.
www.livepowernews.com /stories/0918/061.htm   (474 words)

  
 ELECTRICAL NETWORK-I : ELE 301 EC/CO   (Site not responding. Last check: 2007-11-07)
ELECTRICAL NETWORK-I : ELE 301 EC/CO Network Concepts:Network element symbols andconventions,active element conventions,current and voltage conventions,loops and meshes,nodes,coupled circuits and dot conventions.
Network Functions and Two port parameters: Poles and zeros of a function.,physical and analytical concepts,terminals and terminal pairs,driving point immittances,transfer functions,restrictions on locations of poles and zeros in S-plane.
Sinusoidal Steady State Analysis: Radian Frequency and sinusoid,magnitude and phase of network functions,sinusoidal network functions in terms of poles and zeros,resonant circuits,bandwidth and circuit Q,asymptotic change of magnitude and phase of network functions in light of poles and zeros,polar plots of network functions,analysis and applications of symmetrical lattice network.
education.vsnl.com /scet/SYLEC2.htm   (2639 words)

  
 The Benefits of Symbolic Computations in Mechano-Electrical Network Analysis -- from Mathematica Information Center
A network methodology is used for problem analysis within this paper.
Instead of free body diagrams, the components will be connected at various nodes like an electrical circuit schematic or thermal network.
A library of functions has been written for the Mathematica software package which allows both mechanical and electrical networks to be analyzed.
library.wolfram.com /infocenter/Articles/2100   (190 words)

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