Search results for "Power systems"

showing 10 items of 30 documents

A Method to Evaluate Voltages to Earth During an Earth Fault in an HV Network in a System of Interconnected Earth Electrodes of MV/LV Substations

2008

An easy and swift method to evaluate, in a system of interconnected earth electrodes, earth potentials on earthing systems of medium-voltage/low-voltage (MV/LV) substations, in an event of single-line-to-earth fault inside a high-voltage/medium- voltage (HV/MV) station, is presented. The advantage of the method is the simplicity of the mathematical model for solving complex systems of any size with a sufficient accuracy for practical purposes. This paper shows the results of simulations, performed on networks with different extensions and characteristics, organized in easy-to-read graphs and tables. A comparison of these results with the values obtained according to the procedure explained …

EngineeringGroundbusiness.industryinterconnected earthing systemElectrical engineeringGESEnergy Engineering and Power TechnologyHigh voltageEarthing systemFault (power engineering)earth faultElectronic engineeringglobal earthing systemElectrical and Electronic EngineeringEarthing global earthing systems power systems faultsbusinessPower-system protectionLow voltageElectrical impedanceVoltageIEEE Transactions on Power Delivery
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The Measurement of Reactive Energy in Polluted Distribution Power Systems: An Analysis of the Performance of Commercial Static Meters

2008

This paper presents a comparative analysis of the performances of both a traditional induction meter and various types of commercial static meters for reactive energy in the presence of harmonic distortion. This is a topical issue, since there are several types of static meters on the market, based on different principles of construction. In accordance with current standards, these meters are designed to operate in sinusoidal conditions and their performance is not tested in the presence of harmonic distortion. However, with the increase of pollution levels in power systems, the meters may be used even in the presence of distorted voltages and/or currents; in such cases, their accuracy may …

Total harmonic distortionEngineeringbusiness.industryElectrical engineeringEnergy Engineering and Power TechnologyAC powerAutomotive engineeringPower (physics)law.inventionElectric power systemlawElectrical networkEnergy measurements induction meters power systems harmonics reactive power static metersMetreElectrical and Electronic EngineeringbusinessSettore ING-INF/07 - Misure Elettriche E ElettronicheEnergy (signal processing)VoltageIEEE Transactions on Power Delivery
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Analysis and simulations of the primary frequency control during a system split in continental europe power system

2021

The occurrence of system separations in the power system of Continental Europe has been observed in recent decades as a critical event which might cause power imbalances higher than the reference incident specified per system design, representing an actual challenge for the stability and safe operation of the system. This work presents an analysis and simulations of the primary frequency control in the Continental Europe synchronous area in conditions of system separation. The adopted approach is based on fundamental aspects of the frequency-containment reserve process. The analysis takes an actual event into consideration, which determined the separation of the system in January 2021. The …

Control and Optimizationlcsh:TRenewable Energy Sustainability and the EnvironmentComputer scienceEvent (relativity)Continental EuropeAutomatic frequency controlProcess (computing)Energy Engineering and Power TechnologyPower systems dynamicsContinental Europe; system split; frequency containment reserve; frequency control; power-frequency characteristic; power systems dynamicslcsh:TechnologyStability (probability)Power (physics)Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaElectric power systemControl theoryFrequency containment reserveFrequency controlPower-frequency characteristicSystem splitSystems designElectrical and Electronic EngineeringEngineering (miscellaneous)Energy (miscellaneous)
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Achieving maximum power transfer in a multi-source renewable system

2014

Power systems multi-input converters renewable energy sources renewable energy systems power converters.Settore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici
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A Coexistence Analysis of Blockchain, SCADA Systems, and OpenADR for Energy Services Provision

2022

The advent of blockchain technology allows the raise of new business models for the electricity market, opening the way also to end-users and letting them offer regulation services to the power grid. Thanks to the characteristic of being distributed, the blockchain technology could be a solution to balancing problems caused by the penetration of renewable sources, implementing a platform for Demand-Response programs delivery. Demand-Response allows consumers to respond to market signals by increasing or reducing their energy consumption, contributing to greater flexibility and stability of the grid and to a more efficient use of infrastructures and energy resources. Currently, Demand-Respon…

Load managementGeneral Computer ScienceOpenADRInternet of ThingsGeneral EngineeringSmart gridsSCADA systemscommunication protocolBlockchainsPower systemsDistributed power generationBlockchainSecurityindustrial applicationsGeneral Materials ScienceSCADAElectrical and Electronic Engineeringdistributed energy servicesProtocols
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Dynamic Preisach Hysteresis Model for Magnetostrictive Materials for Energy Application

2013

Magnetic Hysteresis Dynamic Preisach Model Electric Machine Power Systems.Settore ING-IND/11 - Fisica Tecnica Ambientale
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A simple unsynchronized two‐end algorithm for faults location and identification in electrical distribution systems

2012

PurposeThe purpose of this paper is to identify a new and simple two‐end algorithm for fault location identification and characterization, in electrical distribution systems.Design/methodology/approachThe developed diagnostic algorithm is based on a simple model of the network using a lumped parameters representation.FindingsTest results have proved the approach to be efficient, allowing a precise fault identification and location while not requiring synchronized measures from the two ends.Research limitations/implicationsThere is a need for measurement systems at all MV/LV substations.Practical implicationsApplicability with limited investments is not possible where metering systems are no…

EngineeringSIMPLE (military communications protocol)business.industryApplied Mathematicsmedia_common.quotation_subjectSystem of measurementFault (power engineering)network analysis (circuits) power systems fault analysis electric power systemsComputer Science ApplicationsSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaDistribution systemSettore ING-IND/31 - ElettrotecnicaIdentification (information)Smart gridComputational Theory and MathematicsQuality (business)Metering modeElectrical and Electronic EngineeringbusinessAlgorithmmedia_commonCOMPEL - The international journal for computation and mathematics in electrical and electronic engineering
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Noise enhanced stability in magnetic systems

2009

In this paper noise enhanced stability in magnetic systems is studied by both an Ising-type model and a Preisach–Arrhenius model as well as a dynamic Preisach model. It is shown that in one nonequilibrium Ising system noise enhanced stability occurs and that dynamic Preisach model has the capability to predict the occurrence of noise enhanced stability in magnetic systems. On the contrary, in a Preisach–Arrhenius model of a single quadrant magnetic material, noise enhanced stability is not detected.

PhysicsMagnetic noiseCondensed matter physicsIsing systemGeneral Physics and AstronomyNon-equilibrium thermodynamicsSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciCondensed Matter::Disordered Systems and Neural NetworksElectric Machines Power Systems Electric TechnologyMagnetizationMagnetCondensed Matter::Statistical MechanicsIsing modelStatistical physics
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D-Q axis theory of thermomagnetic Curie motor

2010

This paper presents a the d-q axis theory of a thermomagnetic Curie motor. From this theory a maximization procedure of the performances of Curie motor has been developed. The proposed approach has shown that the thermomagnetic Curie motor is equivalent from a magnetic point of view to a d.c. electric machine. Consequently, a design of a Curie motor has been proposed and the calculated performances show a significant improvement in comparison to the performances reported in literature.

Electric machinePhysicsElectric motorbusiness.product_categoryCondensed matter physicsThermomagnetic convectionSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciMagnetic fluxSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaFerromagnetismCurieCurie temperatureElectric Machines Power Systems Electrical TechnologybusinessThe XIX International Conference on Electrical Machines - ICEM 2010
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Energy and economic assessment of a small domestic wind turbine in Palermo

2016

The cost effectiveness of micro-wind technology is closely linked to the annual energy production plants, which strongly depends on the wind characteristics and on the morphological properties of the installation site. The power curve of a wind turbine, supplied by manufacturers, characterizes the theoretical energy performance that it should have at a particular site. The behavior of a wind turbine in the field is affected by the speed but also by wind direction variations. At each change of direction and speed, the turbine will try to adapt to new conditions and the phase transition negatively influences the energy production. In order to experimentally confirm what above mentioned, the a…

micro-wind technologyEngineeringSettore ING-IND/11 - Fisica Tecnica AmbientaleWind powerPower stationMeteorologyRenewable Energy Sustainability and the Environmentbusiness.industryCost effectivenessWind hybrid power systemspower curve020209 energyEnergy Engineering and Power Technology02 engineering and technologyWind directionTurbineFERWind speedOffshore wind powerSettore ING-IND/10 - Fisica Tecnica Industriale0202 electrical engineering electronic engineering information engineeringwind energy productionElectrical and Electronic Engineeringbusiness2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC)
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