Search results for "Grid-connected"

showing 8 items of 48 documents

Theoretical and Experimental Comparison of Total Harmonic Distortion Factors for the Evaluation of Harmonic and Interharmonic Pollution of Grid-Conne…

2006

Grid connected photovoltaic systems are increasingly used in electrical distribution systems. However, they inject distorted currents. Therefore special attention must be paid to harmonic and interharmonic measurements. The new edition of IEC 61000-4-7 introduces the concept of harmonic and interharmonic groups, which implies new expressions for Total Harmonic Distortion factors. In the paper a theoretical and experimental comparison is made between the different total harmonic distortion factors in order to show which of the currently defined distortion factors is best-suited to detect harmonic and interharmonic pollution. Experimental tests were carried out first by means of a calibrator …

Total harmonic distortionEngineeringbusiness.industryPhotovoltaic systemElectrical engineeringEnergy Engineering and Power TechnologyGridlaw.inventionHarmonic analysislawElectrical networkDistortionPersonal computerElectronic engineeringHarmonicElectrical and Electronic EngineeringbusinessGrid-connected photovoltaic systems harmonic and interharmonic analysis IEC 61000-4-7 Ed 2002.IEEE Transactions on Power Delivery
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Assessment of Energy and Economic Effectiveness of Photovoltaic Systems Operating in a Dense Urban Context

2013

A methodology that permits testing the level of integration of the photovoltaic technology in urban areas is presented. The percentage of coverage of the electricity demand of grid-connected photovoltaic systems installed on the roofs of buildings were investigated in a district of the city of Palermo (Sicily). After classifying roofs according to their shape, orientation and pitch by means of satellite images provided by Google Earth, the ratio of the productivity of the PV systems and the consumption of electricity of the households was analysed. The results of the energy assessment have been screened considering the economic feasibility of grid-connected photovoltaic systems: the energy …

Urban ContextEngineeringArchitectural engineeringGrid-connected photovoltaic systems Photovoltaic Solar potential urban context Available roof surface Energy assessment Economic assessment Energy cover factorGrid-connected Photovoltaic Systems;Photovoltaic;Solar Potential;Urban Context;Available Roof Surface;Energy Assessment;Economic Assessment;Energy Cover FactorSolar PotentialAvailable Roof SurfaceEnergy Engineering and Power TechnologyContext (language use)Environmental Science (miscellaneous)lcsh:Technologylcsh:HD72-88lcsh:Economic growth development planningPhotovoltaicsEnergy AssessmentRooftop photovoltaic power stationEnergy Cover FactorWater Science and TechnologySettore ING-IND/11 - Fisica Tecnica AmbientaleRenewable Energy Sustainability and the Environmentbusiness.industrylcsh:TPhotovoltaic systemPhotovoltaic mounting systemSolar potentialEconomic AssessmentEnergy assessmentbusinessGrid-connected Photovoltaic SystemsPannelli fotovoltaici conto energia analisi energetica ed economicaPhotovoltaicEnergy (signal processing)Journal of Sustainable Development of Energy, Water and Environment Systems
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Performance analysis of photovoltaic powered dc motor — Propeller system

2015

The application of autonomous directly photovoltaic (PV) powered electro-mechanical has received increasing attention for different applications (e.g. PV water pumping, PV powered cooling of arid climate greenhouses, solar vehicles etc). The PV array output is a nonlinear and time-dependent power supply that varies with solar intensity and cell temperature, so the performance characteristics of the directly PV-powered DC motor — propeller system are very different than when powered by a constant DC voltage. The focus of this work is to do performance analysis of directly PV-powered DC motor — propeller system. Through performance evaluation, it has been observed that power transfer matching…

Water pumpingMaximum power principleComputer sciencePhotovoltaic systemPropellerAerodynamicsDC motorAutomotive engineeringMaximum power point trackingControl theoryGrid-connected photovoltaic power systemBrushed DC electric motorTorqueMaximum power transfer theorem2015 IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems (SPICES)
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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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An interface protection system with power line communication for distributed generators remote control

2014

The aim of this work is to present a narrow band power line communication (NB-PLC) interface protection system (IPS) for distributed generators (DGs); it has been developed according to the current standard CEI 0-21 and the requirements for smart grid applications. For such applications, the new IPSs have to implement new intelligent functions such as remote monitoring and control of DGs and Energy Storage Systems (ESSs) inverters, not only in terms of disconnection but also of voltage regulation and power modulation by the utility control. The main feature of the developed IPS is the ability to interact with both the grid and the DG's and ESS's inverters. In fact, it can communicate with t…

power line communicationEngineeringdistributed generationbusiness.industryinterface protection systemsRemote monitoring and controlpower system communicationsPower-line communicationSmart gridDistributed generationsmart gridsdistributed generation interface protection systems smart grids power system communications power line communication islanding detectionGrid-connected photovoltaic power systemElectronic engineeringislanding detectionVoltage regulationbusinessSettore ING-INF/07 - Misure Elettriche E ElettronicheModbusPower control2014 IEEE International Workshop on Applied Measurements for Power Systems Proceedings (AMPS)
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A study on the assessment of the production costs curves in micro-grids

2013

In micro-grids, due to their small scale, there is commonly only one power supplier. A competitive wholesale market hardly exists, so the question about how to consider market issues for small producers within micro-grids arises. On the other hand, the specific features of micro-grids where load and generated power hardly find a balance, require that customers take part to regulation issues, also using demand-response (DR) programs. In this paper, price responsive (PR) policies and their programs are discussed to answer this question. A case study of a micro-grid with one micro-turbine and two photovoltaic (PV) generators is analyzed to assess the overall production cost in order to build a…

production costComputer sciencebusiness.industryPhotovoltaic systemtime based programMicro-gridGridSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaStand-alone power systemDSOOrder (exchange)demand responseDistributed generationDynamic demandGrid-connected photovoltaic power systemProduction (economics)price responsivebusinessIndustrial organization
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Design of a Cleaning Program for a PV Plant Based on Analysis of Energy Losses

2015

Solar photovoltaic (PV) energy has grown significantly over the past few years. However, despite the increase in installed capacity, this energy source still raises important concerns related to the variability of power production. The short-term effects such as cloud shadowing and supply interruptions, as well as long-term effects such as dust accumulation, seasonal variation, and ageing of PV modules, can cause variability of power production. Therefore, the analysis of all the variability sources in order to provide statistically consistent power production data is an important challenge. This study presents a methodology to analyze data from a PV plant in order to have an independent ev…

ta213digital signal processingta1172Photovoltaic systemEnvironmental engineeringSeasonalityCondensed Matter Physicsmedicine.diseaseElectronic Optical and Magnetic MaterialsPower (physics)Nameplate capacityenvironmental factorsphotovoltaic systemsmedicineGrid-connected photovoltaic power systemEnvironmental scienceProduction (economics)Electrical and Electronic EngineeringEnergy sourceta218Energy (signal processing)IEEE Journal of Photovoltaics
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Decoupled control scheme of grid-connected split-source inverters

2017

Grid-connected power conversion systems for renewable energy sources must fulfill several requirements, e.g., the high efficiency, the reduced cost and complexity, and, quite often, the boost capabilities that is usually achieved using a front-end dc–dc boost converter before the inversion stage, leading to a two-stage architecture. Meanwhile, single-stage power conversion systems, which perform the boosting operation within the inversion one, offer some potential advantages, in terms of reducing the complexity and the volume of the whole system. Among several proposed options, the split-source inverter (SSI) has been recently proposed by Abdelhakim et al. as an alternative option with some…

voltage-source inverter (VSI)EngineeringDecoupled control; grid connected; impedance-based inverters; renewable energy sources (RESs); single-stage; space vector; split-source inverter (SSI); synchronous reference frame; voltage-source inverter (VSI); Z-source inverter (ZSI); Control and Systems Engineering; Electrical and Electronic Engineering020209 energyModulation index02 engineering and technologySettore ING-INF/01 - Elettronicasynchronous reference frameControl theoryspace vector0202 electrical engineering electronic engineering information engineeringElectronic engineeringElectrical and Electronic EngineeringMATLABcomputer.programming_languagesplit-source inverter (SSI)Z-source inverter Decoupled control Grid-connected Impedance-based inverters Renewable energy sources Single-stage Space vector Split-source inverter Synchronous reference frame Voltage source inverter Mathematical model Inverters Modulation Switches Voltage control Standards Topologybusiness.industry020208 electrical & electronic engineeringInversion (meteorology)Z-source inverter (ZSI)Gridsingle-stageDecoupled controlControl and Systems Engineeringimpedance-based invertersBoost converterrenewable energy sources (RESs)Invertergrid connectedReduced costbusinesscomputerReference frame
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