Search results for "temi"

showing 10 items of 3194 documents

On the effects of HV/MV stations on global grounding systems

2016

The METERGLOB project has faced the issue of the identification of Global Grounding Systems. One of the main point of the problem is to define if an interconnection of single grounding systems gives place to a Global Grounding System in any condition and for every kind of ground fault. This paper focuses the attention on what happens in the case of single line to ground fault inside a HV/MV station whose ground electrode is connected to the cable' shields of the MV lines outgoing the station and supplying the secondary substations of a given area.

EngineeringInterconnectionbusiness.industryGroundRenewable Energy Sustainability and the EnvironmentElectrical engineeringShieldsEnergy Engineering and Power TechnologyEarthing systemSingle lineGlobal Grounding SystemSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaGround-penetrating radarGround faultElectronic engineeringPoint (geometry)Electrical and Electronic EngineeringbusinessElectrical conductorHV/MV station
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New Measurement Procedure for Load Flow Evaluation in Medium Voltage Smart Grids

2013

The aim of this paper is to present a new approach for the medium voltage (MV) distribution network load flow analysis, mainly based on power measurement at the low voltage (LV) level of MV/LV distribution substations. This allows to use measurement instruments, usually already installed in the secondary substations, thus achieving an equally reliable measurement system with a lower cost compared to measurements at the MV side. The new approach can be applied using a proper communication system to collect the nodal measurements and an iterative algorithm based on ladder iterative technique (LIT) to compute the load flow. The validity of this method is presented and discussed on the basis of…

EngineeringIterative methodbusiness.industrypower system measurementSystem of measurementSmart grid (SG) power system measurements load flow power quality analyzer (PQA) state estimation (SE) advanced metering infrastructure (AMI)substations.Communications systemautomatic meter readingpower distribution reliabilityPower (physics)Settore ING-IND/33 - Sistemi Elettrici Per L'Energiasmart power gridsSmart gridElectronic engineeringload flowiterative methodsPower-flow studybusinessLow voltageSettore ING-INF/07 - Misure Elettriche E ElettronicheVoltagepower system state estimation
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Legal Liability of Professional Engineers: The Case of a Fire at a Shopping Center

2019

In this paper, the authors discuss the legal liabilities of the professional engineer as both the engineer of record of a project and the construction site manager. In particular, this paper analyzes the case of a fire at an end-user MV/LV substation of a shopping center in Italy, occurred a few years after maintenance works on the electrical installation. The professional engineer who had designed and overseen the construction of the substation was accused of criminal negligence. The authors through the examination of applicable technical standards, as well as of safety regulations, demonstrate that the professional engineer had acted diligently and that there was no ground for the neglige…

EngineeringLegal liabilitybusiness.industrySubstationsSite managerTechnical standardForensic EngineeringLegal liabilitySettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaDocumentationProfessional EngineerElectrical installationEngineering ethicsCenter (algebra and category theory)businessElectric FireCriminal negligenceChain of custody
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Optimization of photovoltaic energy production through an efficient switching matrix

2013

This work presents a preliminary study on the implementation of a new system for power output maximization of photovoltaic generators under non-homogeneous conditions. The study evaluates the performance of an efficient switching matrix and the relevant automatic reconfiguration control algorithms. The switching matrix is installed between the PV generator and the inverter, allowing a large number of possible module configurations. PV generator, switching matrix and the intelligent controller have been simulated in Simulink. The proposed reconfiguration system improved the energy extracted by the PV generator under non-uniform solar irradiation conditions. Short calculation times of the pro…

EngineeringMPPTPhotovoltaic modulesEnergy Engineering and Power TechnologyDynamic electrical schemeEnvironmental Science (miscellaneous)lcsh:Technologylcsh:HD72-88Maximum power point trackinglcsh:Economic growth development planningPV systemsGenerator (circuit theory)Matrix (mathematics)Control theoryGrid-connected photovoltaic power systemElectronic engineeringPV systems; Photovoltaic modules; Mismatch; Optimization algorithm; Reconfiguration; MPPT; Dynamic electrical schemeWater Science and Technologylcsh:TRenewable Energy Sustainability and the Environmentbusiness.industryPhotovoltaic systemControl reconfigurationControl engineeringPV systems Photovoltaic modules Mismatch Optimization algorithm Reconfiguration MPPT Dynamic electrical schemeSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaOptimization algorithmSettore ING-IND/31 - ElettrotecnicaMismatchReconfigurationInverterbusinessJournal of Sustainable Development of Energy, Water and Environment Systems
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Special Issue of Journal of Manufacturing Systems on New Trends in Manufacturing Systems Research

2019

Special issue of journal of manufacturing systems on new trends in manufacturing systems research

EngineeringManufacturing Systems ResearchArtificial Intelligencebusiness.industryComputerApplications_COMPUTERSINOTHERSYSTEMSManufacturing systemsbusinessSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)Industrial and Manufacturing EngineeringManufacturing engineeringProcedia Manufacturing
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Special Issue of Journal of Manufacturing Systems on Advancing Manufacturing Systems Research at NAMRC 46

2018

Special Issue of Journal of Manufacturing Systems on Advancing Manufacturing Systems Research at NAMRC 46

EngineeringManufacturing SystemsArtificial Intelligencebusiness.industryComputerApplications_COMPUTERSINOTHERSYSTEMSbusinessManufacturing systemsSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)Industrial and Manufacturing EngineeringManufacturing engineeringProcedia Manufacturing
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Economic evaluation of PV system for EV charging stations: Comparison between matching maximum orientation and storage system employment

2016

This article addresses the problem of the choice of a generation system to be implemented to reduce the impact of charging electric vehicles at University. Based on the behaviour of the student population, it is identified the electrical load. Two possible solutions are evaluated in order to manage the peak load: an orientation of the panels in order to increase the power at defined time and the use of storage system. The main strength and weakness points of two systems are investigated by taking into account the Levelized Cost of Energy.

EngineeringMatching (statistics)Electrical load020209 energyEnergy Engineering and Power Technology02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciAutomotive engineering0202 electrical engineering electronic engineering information engineeringRenewable EnergyCost of electricity by sourceCharging; EVs; Photovoltaic; Energy Engineering and Power Technology; Renewable Energy Sustainability and the EnvironmentEVsSustainability and the EnvironmentOrientation (computer vision)business.industryPhotovoltaic systemElectrical engineering020206 networking & telecommunicationsPower (physics)Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaComputer data storageEconomic evaluationbusinessPhotovoltaicSettore ING-INF/07 - Misure Elettriche E ElettronicheChargingEV
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Electrostatic synchronous generator model of an Inverter-Based Distributed Generators

2015

In this paper, the idea of modelling the Inverter-Based Distributed Generators by using the concept of Electrostatic synchronous machines is discussed. A mathematical model of the inverter has been established which depends on the dc bus voltage, modulation index and frequency of the system. Two mathematical models have been developed: a small signal model and a steady-state model. These mathematical models will be helpful in studying the stability of a microgrid; especially when studying the transient stability performance of on-grid operation of converter-based distributed generator with multi-machine microgrid. Simulation results using Matlab/Simulink are carried out.

EngineeringMathematical modelMicrogridbusiness.industryRenewable Energy Sustainability and the EnvironmentModulation indexEnergy Engineering and Power TechnologyPermanent magnet synchronous generatorDistributed GeneratorSmall-signal modelStability of microgridSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaComputer Science::Hardware ArchitectureElectrostatic Synchronous MachineElectronic engineeringInverterMicrogridTransient (oscillation)businessMATLABcomputercomputer.programming_language
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Optimal Electrical Distribution Systems Reinforcement Planning Using Gas Micro Turbines by Dynamic Ant Colony Search Algorithm

2007

Distribution systems management is becoming an increasingly complicated issue due to the introduction of new energy trading strategies and new technologies. In this paper, an optimal reinforcement strategy to provide reliable and economic service to customers in a given time frame is investigated. In the new deregulated energy market and considering the incentives coming from the political and economical fields, it is reasonable to consider distributed generation (DG) as a viable option for systems reinforcement. In the paper, the DG technology is considered as a possible solution for distribution systems capacity problems, along several years. Therefore, compound solutions comprising the i…

EngineeringMathematical optimizationCogeneration distributed generation gas microturbines power distribution economics power distribution planningbusiness.industryEnergy managementAnt colony optimization algorithmsEnergy Engineering and Power TechnologyAnt colonyTechnology managementSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSearch algorithmDistributed generationEnergy marketTrading strategyElectrical and Electronic Engineeringbusiness
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Optimization methods for complex sheet metal stamping computer aided engineering

2010

Nowadays, sheet metal stamping processes design is not a trivial task due to the complex issues to be taken into account (complex shapes forming, conflicting design goals and so on). Therefore, proper design methodologies to reduce times and costs have to be developed mostly based on computer aided procedures. In this paper, a computer aided approach is proposed with the aim to offer a methodology able to solve very complex sheet metal stamping processes, in particular a progressive design approach based on the integration between numerical simulations and optimization methodologies is presented. In particular, Response Surface Method, Moving Least Squares approximation and Pareto optimal s…

EngineeringMathematical optimizationControl and Optimizationbusiness.industrymedia_common.quotation_subjectRestraining forceSheet stampingStampingComputer Graphics and Computer-Aided DesignIndustrial engineeringComputer Science ApplicationsSet (abstract data type)Response surface methodologyMoving least squares approximationControl and Systems EngineeringComputer-aidedQuality (business)Moving least squaresComputer-aided engineeringbusinessEngineering design processDesign methodsSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneSoftwaremedia_commonStructural and Multidisciplinary Optimization
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