Search results for "Tito"

showing 10 items of 719 documents

Perspective on hydrogen energy carrier and its automotive applications

2014

The paper outlines the concept of energy carrier with a particular reference to hydrogen, in view of a more disseminated employment in the field of automotive applications. In particular hydrogen production is analyzed considering the actual state of the art and recent technologies applied in production from the primary sources (fossil fuels, renewable energies, and water electrolysis). Then the problem of hydrogen storage is considered both from technical and economical point of views. In particular, differences between physical and chemical storage are here considered with a particular glance to the most innovative technologies including carbon nanostructures. A review on the main problem…

Energy carrierEnergy carrierRenewable Energy Sustainability and the Environmentbusiness.industryComputer scienceFossil fuelAutomotive industryEnergy Engineering and Power TechnologyStorageNanotechnologyTransportationSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciCondensed Matter PhysicsRenewable energyHydrogen storageFuel TechnologyHydrogen safetyRisk analysis (engineering)Hydrogen fuelbusinessHydrogen productionHydrogen
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Reconfiguration strategies to reduce mismatch effects on PV array: An Arduino-based prototype

2014

Today, solar energy represents a widespread source of electricity among all the renewable energies. One of the major problems concerning the photovoltaic (PV) arrays is the partial shading, that is the non-uniform irradiance on its parts. The partial shading leads to several undesired effects, such as mismatch between modules and a reduction of the production of electric energy. In order to alleviate the partial shading effects, different methods can be employed. Among them, the reconfiguration of the electrical connections between modules represents an alternative solution. In this paper, an algorithm of reconfiguration for a small-scale PV plant is proposed and experimental results showin…

Energy recoveryEngineeringbusiness.industryPhotovoltaic systemphotovoltaic arraysolar modulesControl reconfigurationSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSolar energyRenewable energyPhotovoltaic thermal hybrid solar collectorrenewable energieGrid-connected photovoltaic power systemElectronic engineeringbusinessRooftop photovoltaic power stationphotovoltaic reconfiguration2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion
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Simulation of a single-phase five-level cascaded H-Bridge inverter with multicarrier SPWM B-Spline based modulation techniques

2017

Multilevel Power Inverters are now often used to convert DC to AC voltage waveform. This kind of converter allows high power quality with low output harmonics and lower commutation losses with respect to the traditional ones in order to optimize this aspect. This paper presents a novel simulation analysis of the Multicarrier Sinusoidal Pulse Width Modulation (MC SPWM) techniques B-Spline functions based to control the switches of five-level single-phase cascaded H-bridge inverter. In order to verify the performance of the converter, the harmonic content of the voltage due to modulation techniques has been taken into account. Results highlight the comparison between different B-Spline functi…

Engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciences010309 optics0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectronic engineeringMultilevel power converterWaveformCommutationElectrical and Electronic EngineeringRenewable Energy Sustainability and the Environmentbusiness.industryB-spline function020208 electrical & electronic engineeringMulticarrier modulation techniquePower (physics)Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaModulationHarmonicsAutomotive EngineeringHarmonicInverterbusinessPulse-width modulation2017 Twelfth International Conference on Ecological Vehicles and Renewable Energies (EVER)
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New approach for harmonic mitigation in single-phase five-level CHBMI with fundamental frequency switching

2017

The main objective of this paper is to study and analyse the voltage output waveform of a multilevel inverter, to suggest a new approach for harmonic mitigation improving the converter performance. These last type of converters represent a new technology in the field of DC/AC electrical energy conversion, presenting advantages respect to the traditional converters. In fact, the multilevel power converters present a low harmonic content and a high voltage level. The paper considers a five-level single-phase cascaded H-bridge inverter and fundamental frequency modulation techniques. The voltage waveform analysis has allowed to identify a working area of the converter where there are lowest va…

Engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciences010309 optics0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectronic engineeringWaveformRenewable EnergyElectrical and Electronic EngineeringMultilevel Power ConverterMultilevel Power Converter; Phase Shifted Voltage Cancellation; Soft switching; Renewable Energy Sustainability and the Environment; Automotive Engineering; Electrical and Electronic EngineeringSustainability and the Environmentbusiness.industryRenewable Energy Sustainability and the Environment020208 electrical & electronic engineeringElectrical engineeringFundamental frequencyConvertersSoft switchingPower (physics)Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaPhase Shifted Voltage CancellationModulationAutomotive EngineeringHarmonicInverterbusinessVoltage
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A DSP-Based Resolver-To-Digital Converter for High-Performance Electrical Drive Applications

2016

This paper presents a low cost, simple, and highly accurate resolver-to-digital converter (RDC) for electrical drive applications based on an integrated software approach, thus allowing a significant reduction of hardware components count with significant improvements in terms of reliability, reduction of fault rate, and susceptibility to electromagnetic interference (EMI). Particular attention has been addressed to cost which is 25% off over conventional RDC. Simulations and experimental tests confirm the high quality of the proposed system.

Engineering02 engineering and technologySpeedSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciPosition01 natural sciencesElectromagnetic interferenceReduction (complexity)Reliability (semiconductor)SoftwareHardwareBand-pass filterEMIRotor0202 electrical engineering electronic engineering information engineeringElectronic engineeringresolverBand-pass filterElectrical and Electronic EngineeringpeedDigital signal processingSignal resolutionbusiness.industry020208 electrical & electronic engineering010401 analytical chemistryTracking loopElectrical DriveDigital signal processing0104 chemical sciencesControl and Systems EngineeringResolverbusinessSoftware
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Experimental analysis with FPGA controller-based of MC PWM techniques for three-phase five level cascaded H-bridge for PV applications

2016

The FPGA represents a valid solution for the design of control systems for inverters adopted in the field of PV systems because of their high flexibility of use. This paper presents an experimental analysis of the MC SPWM techniques for a three-phase, five-level, cascaded H-Bridge inverter with FPGA controller-based. Several control algorithms are implemented by means of the VHDL programming language and the output voltage waveforms obtained from the main PWM techniques are compared in terms of THD%. Simulation and experimental results are analysed, compared and discussed.

Engineering020209 energyEnergy Engineering and Power Technology02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciGrid connectedControl theoryVHDL0202 electrical engineering electronic engineering information engineeringElectronic engineeringMultilevel power converterRenewable EnergyField-programmable gate arrayFPGAcomputer.programming_languageTotal harmonic distortionSustainability and the EnvironmentRenewable Energy Sustainability and the Environmentbusiness.industry020208 electrical & electronic engineeringH bridgeSettore ING-IND/31 - ElettrotecnicaControl systemInverterVHDLbusinessFPGA; Grid connected; Multilevel power converter; Photovoltaic; VHDL; Energy Engineering and Power Technology; Renewable Energy Sustainability and the EnvironmentPhotovoltaiccomputerPulse-width modulation2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA)
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Energy Saving in Public Transport Using Renewable Energy

2017

Hydrogen produced by renewable sources represents an interesting way to reduce the energetic dependence on fossil fuels in the transportation sector. This paper shows a feasibility study for the production, storage and distribution of hydrogen in the western Sicilian context, using three different renewable sources: wind, biomass and sea wave. The objective of this study is the evaluation of the hydrogen demand, needed to replace all diesel supplied buses with electrical buses equipped with fuel cells. An economic analysis is presented with the evaluation of the avoidable greenhouse gas emissions. Four different scenarios correlate the hydrogen demand for urban transport to the renewable en…

Engineering020209 energyGeography Planning and DevelopmentTJ807-830Context (language use)02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici010501 environmental sciencesManagement Monitoring Policy and LawTD194-19501 natural sciencesRenewable energy sourcesBiomaHydrogen economy0202 electrical engineering electronic engineering information engineeringwindGE1-350Sea wave0105 earth and related environmental sciencesMobilitySettore ING-IND/11 - Fisica Tecnica AmbientalebiomassEnvironmental effects of industries and plantsWaste managementRenewable Energy Sustainability and the Environmentbusiness.industryFossil fuelEnvironmental engineeringRenewable fuelsRenewable energyEnvironmental sciencesEnergy conservationhydrogenGreenhouse gashydrogen; wind; biomass; sea wave; mobilitybusinessEnergy sourceSustainability; Volume 9; Issue 1; Pages: 106
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Comparison on the use of PV systems in the vertical walls

2015

In this article the preliminary evaluation of the performance of a photovoltaic window is presented. The aim is to trace the behavior of next-generation systems, which favor architectonical integration. Three different systems have been taken into account: a dye sensitized solar cell (DSSC), blue and grey caved silicon panels. The systems can be placed behind a window or behind a wall of glass blocks.

EngineeringArchitectural engineeringSiliconbusiness.industryPhotovoltaic systemWindow (computing)chemistry.chemical_elementPhotovoltaic mounting systemStructural engineeringSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSettore ING-INF/01 - ElettronicaSettore ING-IND/31 - ElettrotecnicaDye-sensitized solar cellgreen energychemistryintegrated photovoltaicDSSCbusinessSettore ING-INF/07 - Misure Elettriche E Elettroniche2015 International Conference on Renewable Energy Research and Applications (ICRERA)
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Fault Tolerant Ancillary Function of Power Converters in Distributed Generation Power System within a Microgrid Structure

2013

Distributed generation (DG) is deeply changing the existing distribution networks which become very sophisticated and complex incorporating both active and passive equipment. The simplification of their management can be obtained assuming a structure with small networks, namely, microgrids, reproducing, in a smaller scale, the structure of large networks including production, transmission, and distribution of the electrical energy. Power converters in distributed generation systems carry on some different ancillary functions as, for example, grid synchronization, islanding detection, fault ride through, and so on. In view of an optimal utilization of the generated electrical power, fault to…

EngineeringArticle Subjectbusiness.industryControl engineeringFault toleranceSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciFault (power engineering)Power Converters Fault Tolerant Distributed Generation MicrogridsStuck-at faultElectric power systemDistributed generationElectronic engineeringIslandingElectric powerMicrogridElectrical and Electronic Engineeringbusiness
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A semi-empirical multipurpose steady-state model of a fuel cell for household appliances

2013

In this paper, a multipurpose model of a proton exchange membrane fuel cell for household appliances is proposed. According to a conventional mathematical approach, the proposed model is derived from the physical and electro-chemical equations that rule the fuel cell behaviour. Differently from existing models, a parametric analysis is carried out and a few tunable parameters are accurately selected and identified. Furthermore, this paper proposes an innovative technique of unique model architecture which enables the designer to solve by himself the trade-off between complexity and accuracy on the basis of the specific applications. Three different choices could be performed by the designer…

EngineeringBasis (linear algebra)Parametric analysisWaste managementbusiness.industryAbsolute accuracySteady State theoryProton exchange membrane fuel cellControl engineeringExperimental validationSettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettriciproton exchange membrane fuel cellfuel cellmodellingModel architectureFuel cellsrenewable energy sourcebusinesssemi-empirical model2013 International Conference on Clean Electrical Power (ICCEP)
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