Search results for "elettrici"

showing 10 items of 959 documents

A Dynamic Electrical Scheme for the optimal reconfiguration of PV modules under non-homogeneous solar irradiation

2012

This paper presents a strategy for the maximization of the output power of photovoltaic (PV) systems under non homogeneous solar irradiation by means of automatic reconfiguration of the PV arrays layout. The innovation of the proposed approach is the employment of a simple Dynamic Electrical Scheme (DES), allowing a large number of possible modules interconnection, to be installed between the PV generator and the inverter. The models of the PV generator and of the DES have been realized and simulated with Simulink (Dynamic System Simulation for MATLAB). The attained experimental results appear to be quite interesting in terms of the attainable benefit in power and thus energy terms. The lim…

mismatch for photovoltaic modules optimization reconfigurationEngineeringInterconnectionbusiness.industryPhotovoltaic systemControl reconfigurationPV modules photovoltaic MPPT reconfiguration non-homogeneous solar irradiationGeneral MedicineMaximum power point trackingPower (physics)Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaControl theoryGrid-connected photovoltaic power systemElectronic engineeringInverterbusinessMATLABcomputercomputer.programming_language
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Caratterizzazione del campo di induzione magnetica prodotto da cabine secondarie

2014

L’articolo presenta una metodologia per la caratterizzazione del campo di induzione magnetica nei pressi di cabine secondarie di tipo a box prefabbricato in cemento armato vibrato, che costituisce un valido strumento per la verifica del rispetto degli obiettivi di qualità imposti dalla legislazione vigente.

misure di campo di induzione magnetica esposizione umana cabine di distribuzione distanza di prima approssimazione (DPA).Settore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSettore ING-INF/07 - Misure Elettriche E Elettroniche
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Fuel cell analytical modeling: Solving the trade-off between accuracy and complexity

2013

In this paper, a 5.5 kW Proton Exchange Membrane fuel cell is modeled. The proposed analytical model is described and the parameters identification procedure is further discussed. Simulation results of all three sub-models are compared to test the accuracy of each one. A comparison between simulation and experimental results is provided as well validating the modeling approach.

modeling fuel cell proton exchange membrane fuel cell hydrogenSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSettore ING-INF/01 - Elettronica
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Technical and economical comparison between NdFeB and hard ferrites linear electrical generators from sea waves

2015

In this paper the authors perform a technical-economic comparison of two different Tubular Permanent Magnet Linear Machines for sea waves generation by using finite elements analysis. The first configuration includes ferrite rings while the second configuration includes neodymium-iron-boron rings. In order to compare the two types in economic and technical terms, a detailed analysis of the main figures of merit of the two configurations has been carried out. In particular, significant data such as flux distribution, rated voltage and current, axial force, electric power, realization cost and maintenance cost have been compared.

neodymium-iron-boronpermanent magnets linear machineComputer sciencebusiness.industryRenewable Energy Sustainability and the EnvironmentElectrical engineeringMechanical engineeringElectric generatorEnergy Engineering and Power TechnologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciMagnetic fluxFinite element methodlaw.inventionferriteNeodymium magnetlawMagnetFigure of meritsea wave generatorElectric powerbusinessSettore ING-INF/07 - Misure Elettriche E ElettronicheVoltage
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Critical issues and future prospects of the secondary substation in smart grid context

2014

This paper is focused on the new role of the secondary substation in the smart grids context. This innovative view has been proposed and developed in the framework of two Research Projects: NewCabELARC Project and Reipersei Project. The latter provides a concrete and comprehensive low cost solutions for the smart grid monitoring and control, allowing the real diffusion and integration of Distributed Generation and the full exploitation of Renewable Energy Sources. In this field, this paper shows how the secondary substation (SS) takes the role of smart transducer node where innovative devices can be located, collecting the measurement data coming from the field devices (power and energy met…

optic fiberEngineeringbusiness.industryNode (networking)Interface (computing)Electrical engineeringContext (language use)Smart gridSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSmart transducerGridlaw.inventionSmart griddistribution networkslawDistributed generationpower line communication (PLC)Smart grids; secondary substation; power line communication (PLC); optic fiber; distribution networksSystems engineeringsecondary substationbusinessSettore ING-INF/07 - Misure Elettriche E ElettronicheRemote control2014 AEIT Annual Conference - From Research to Industry: The Need for a More Effective Technology Transfer (AEIT)
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Optimization of BESS Capacity Under a Peak Load Shaving Strategy

2018

Battery energy storage systems (BESSs) are becoming increasingly competitive in the global energy landscape, thanks to the strong cost reduction that has taken place in recent years and it is expected to continue in the next future. Among the many benefits BESSs can provide, time shifting can be exploited by electricity consumers to save on the electricity bill, charging the storage during the off-peak hours and discharging when the cost of electricity is high. This paper describes a simple procedure to optimize the BESS capacity under a peak load shaving strategy, in presence of a time-of-use (TOU) electricity rate, able to guarantee, at the same time, the flattest daily power diagram and …

peak shaving strategyComputer sciencebusiness.industry020209 energy02 engineering and technologyTime shiftingpeak demand chargeBattery energy storage systemAutomotive engineeringPeak load shavingRenewable energySettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaCost reduction0202 electrical engineering electronic engineering information engineeringPower diagramElectricitybattery energy storage systembusinessCost of electricity by source2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
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DEMAND Project: A Peak Load Shaving Strategy for End-User Consumers

2018

Battery energy storage systems (BESS) are becoming increasingly widespread in modern power systems, thanks to the important benefits they can provide to the electricity grid. Indeed, BESS can be used in time shifting applications, storing energy during off-peak periods and discharging during peak times (when the cost of electricity is high). When BESS are used for peak shaving purposes, they also contribute to relieve peak demand charges, thus ensuring a saving for the consumers. This paper describes a peak load shaving strategy defined within the DEMAND project. The strategy is able to guarantee the flattest daily power diagram and the maximum benefit for the electricity consumers, reducin…

peak shaving strategyFlexibility (engineering)Computer scienceEnergy managementbusiness.industry020209 energy02 engineering and technologypeak demand chargeEnvironmental economicsEnergy storageSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaElectric power systemPeak demandPeaking power plant0202 electrical engineering electronic engineering information engineeringelectricity billTOU tariffsElectricityCost of electricity by sourcebusinessbattery storage system2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
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Efficiency Improvement of Permanent-magnet Synchronous Motor Drives for Household Appliances

2011

This paper deals with some aspects of efficiency improvement of PMSMD (Permanent Magnet Synchronous Motor Drives). Particularly two aspects are focused: the control algorithm for the PMSMD, which allows to reduce the power losses of the electric drive without penalty on its dynamic performances and the optimization of an IPMSM (Interior Permanent Magnet Synchronous Motor) rotor configuration capable to increase the performances in terms of shaft torque production, limiting at the same time the rotor leakage flux. The loss minimization algorithm is here briefly analysed, a test bed for experimental validation is presented and the data are analysed. Experimental tests have been performed aimi…

permanent magnet machines and driveEfficiency improvementfinite element analysisSettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici
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Thin Film CIGS Solar Cells, Photovoltaic Modules, and the Problems of Modeling

2013

Starting from the results regarding a nonvacuum technique to fabricate CIGS thin films for solar cells by means of single-step electrodeposition, we focus on the methodological problems of modeling at cell structure and photovoltaic module levels. As a matter of fact, electrodeposition is known as a practical alternative to costly vacuum-based technologies for semiconductor processing in the photovoltaic device sector, but it can lead to quite different structural and electrical properties. For this reason, a greater effort is required to ensure that the perspectives of the electrical engineer and the material scientist are given an opportunity for a closer comparison and a common language.…

photovoltaic moduleArticle SubjectComputer sciencelcsh:TJ807-830CIGS solar celllcsh:Renewable energy sourcessolar energyNanotechnologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSettore ING-INF/01 - ElettronicamodellingGeneral Materials ScienceThin filmThin-film solar cellRenewable Energy Sustainability and the Environmentbusiness.industryPhotovoltaic systemSettore ING-INF/02 - Campi ElettromagneticiGeneral ChemistrysimulationEngineering physicsCopper indium gallium selenide solar cellsAtomic and Molecular Physics and OpticsSemiconductorThin-film solar cells; CIGS solar cells; modelling; simulations; photonic structures; photovoltaic modules; solar energyCell structurephotonic structurebusiness
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Experimental test of the performances of a photovoltaic modules model

2015

In this paper, a measurement-based modeling technique for PV panels oriented to power electronics design is proposed. The proposed modelling approach aims at an accurate modeling of the whole PV curve and not only around a few remarkable points. The proposed approach is based on an experimental characterization of the module under test. In fact, the incompleteness of manufacturers' data and the knowledge of physical parameters are the main source of inaccuracy in existing modelling approaches. The proposed approach is applied to a four lumped parameters model of a Conergy E215P solar module. Tests are performed under natural light. The parameter identification procedure is described in deta…

photovoltaic moduleEngineeringRenewable Energy Sustainability and the Environmentbusiness.industryPhotovoltaic systemEnergy Engineering and Power TechnologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciCurrent sourceTemperature measurementTest (assessment)Identification (information)modelling and simulationPower electronicsElectronic engineeringVoltage sourceElectrical and Electronic EngineeringbusinessVoltage2015 International Conference on Clean Electrical Power (ICCEP)
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