Search results for "racking"

showing 10 items of 815 documents

Economic analysis on dynamic photovoltaic systems in new Italian “feed in tariffs” context

2013

Dynamic photovoltaic generators, based on the application of solar-trackers, are able to give an increment to the electric energy production from solar source. Their realization and maintenance costs are certainly higher than those of fixed ones. In this paper the Authors propose a method to estimate the increment of electrical energy generation that must be guaranteed by a dynamic photovoltaic generator, so as its realization could be more favorable with respect to that of a fixed generator one with the same rated power. This method, developed by means of classical economic indexes like the Pay-Back-Period and the Net Present Value, takes in to account the economic incentives for the PV sy…

EngineeringMathematical optimizationPower ratingbusiness.industryPhotovoltaicsPhotovoltaic systemGrid-connected photovoltaic power systemElectrical engineeringContext (language use)businessActivity-based costingFeed-in tariffMaximum power point tracking2013 International Conference on Clean Electrical Power (ICCEP)
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Photovoltaic based active generator: Energy control system using stateflow analysis

2015

At present, most of the grid connected photovoltaic (PV) systems are operating at maximum power points and injecting power in uncontrolled way. Thus, active generator will be a good solution to support instantaneous power balance, frequency control and maintaining the power quality with controllable power injection. This new mode of active generator needs innovative power management. The new proposed energy control system for active generator might help to manage the energy within the micro-grid environment. In this work, the focus is to manage the energy among the PV based active generator, load and interconnected grid and energy controller architecture for that purpose is presented. It co…

EngineeringMaximum power principlebusiness.industryEnergy managementPhotovoltaic systemStateflowControl engineeringMaximum power point trackingSmart gridDistributed generationGrid-connected photovoltaic power systembusinesscomputercomputer.programming_language2015 IEEE 11th International Conference on Power Electronics and Drive Systems
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A new modified Inc-Cond MPPT technique and its testing in a whole PV simulator under PSC

2015

In this paper a new modified Inc-Cond MPPT technique able to lead PV plants to work in the real MPP (Maximum Power Point) under PSC (Partial Shading Condition) is proposed. The new Inc-Cond MPPT technique working principle is fully explained, discussed and then successfully tested in a whole and reliable PV simulator conceived and set-up by the Authors in order to test and compare several new MPPT algorithms. The simulation results show that the proposed Inc-Cond MPPT technique is able to successfully lead the PV plant to work in the real MPP both in the cases of instantaneous and gradual changing of shading and of temperature conditions.

EngineeringMaximum power principlebusiness.industryPhotovoltaic power systemSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciMaximum power point trackingMaximum power point trackingPower optimizerPower system simulationControl theoryIncremental conductanceGrid-connected photovoltaic power systemPower system simulationPv plantElectrical and Electronic EngineeringbusinessSimulation
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Trajectory tracking of underactuated underwater vehicles

2003

This paper deals with a control strategies for underactuated underwater vehicles whose target is the tracking of a space trajectory. A cascade control strategy is employed which brings to a control law consisting of: 1) a kinematic control law, derived from the vehicle kinematic model, which forces this model to track the reference trajectory; and 2) a dynamic control law which forces the system to track the reference signals given by the kinematic control law. Conditions for asymptotic tracking of the trajectory are given with reference to the standard dynamical model of the above vehicle. An observer of the marine current is also added in order to process the control law. Simulation tests…

EngineeringObserver (quantum physics)business.industryUnderactuationnavigation systemsProcess (computing)Control engineeringKinematicsTracking (particle physics)Pipeline surveyingComputer Science::RoboticsSettore ING-INF/04 - AutomaticaTrajectory trackingControl theoryCascadeTrajectoryUnderactuated underwater vehicleUnderwaterbusinessProceedings of the 40th IEEE Conference on Decision and Control (Cat. No.01CH37228)
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Technical and economical evaluation on the use of reconfiguration systems in some EU countries for PV plants

2017

This paper shows the technical and economical evaluation of the application of a reconfiguration system for photovoltaic (PV) plants, considering the incentives system in some European Union countries. The reconfiguration system is an alternative to the distributed maximum power point tracking technique which used to increase the power production in the PV plants under the mismatch phenomenon. The reconfiguration techniques employ a microprocessor-based or field-programmable gate array-based system that modifies the layout of the PV plant through the change of the connections among modules. After having presented the main features working of the PV reconfiguration system allowing the improv…

EngineeringPartial shading (PS)020209 energy02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciIndustrial and Manufacturing EngineeringMaximum power point trackingGate arrayIncentives policie0202 electrical engineering electronic engineering information engineeringProduction (economics)media_common.cataloged_instancePV system topologyElectrical and Electronic EngineeringEuropean unionPhotovoltaic (PV) power systemmedia_commonMismatch lossebusiness.industryMismatch conditionPhotovoltaic systemControl reconfigurationControl engineeringInvestment (macroeconomics)Reliability engineeringSettore ING-IND/31 - ElettrotecnicaIncentiveControl and Systems EngineeringReconstructionbusinessSettore ING-INF/07 - Misure Elettriche E Elettroniche
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Residence time distribution of solid particles in a continuous, high-aspect-ratio multiple-impeller stirred vessel

2004

Abstract In this paper experimental information on the retention time distribution (RTD) of solid particles in a high-aspect-ratio vessel, stirred by three equally spaced Rushton turbines, is presented. The relevant data were obtained by a special technique named twin system approach (TSA) that greatly simplifies the handling of particle-laden streams and is therefore particularly suited for investigating particle RTD in flow systems. The technique fundamentals are first summarized, together with the data analysis procedure. This lastly requires a numerical deconvolution operation that is easily performed with the help of Z -transforms. Two different approaches for excluding the spurious co…

EngineeringPipingbusiness.industryApplied MathematicsGeneral Chemical EngineeringSettore ING-IND/25 - Impianti ChimiciFlow modelGeneral ChemistryMechanicsResidence time distributionMultiple-impellerIndustrial and Manufacturing EngineeringParticle tracingImpellerTwin systems approachParticle RTDCascadeParticle tracking velocimetryRetention time distributionParticleStirred vesselDeconvolutionbusinessSimulationBackflow
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New Power Conditioning System for Battery-free Satellite Buses with Maximum Power Point Tracking

2007

The purpose of this paper is describe a new conception of Power Conditioning Unit (PCU) developed to fulfill the requirements of BepiColombo Electronic Propulsion module. This load bus has very tough specification especially regarding transient response during total load switch-off ("beam out") which has to be less than 2% of the bus voltage. The conception we propose, is the new Sequential Switching Shunt Maximum Power Regulator (S3MPR) consisting in a S3R, to keep the SA voltage at its Maximum Power Point (MPP) followed by a Boost regulator to produce a constant 100V to supply the Electronic Propulsion (EP). This concept may also be of interest for other future missions involving high pow…

EngineeringPower ratingSwitched-mode power supplybusiness.industryElectrical engineeringPower factorPower-flow studyPower supply unitVoltage optimisationbusinessMaximum power point trackingConstant power circuitAPEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition
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Economic benefits of the use of a PV plants reconfiguration systems

2015

This paper shows the economic convenience of the application of a reconfiguration system for photovoltaic plants, considering the incentives system in different Countries. The reconfiguration is an alternative to the Distributed Maximum Power Point Tracking, DMPPT, technique used to overcome the mismatch problem in Photovoltaic, PV, plants. The reconfiguration techniques employ a microprocessor-based system that modifies the layout of the PV plant by physically changing the connections among modules. After having presented the working principle of the PV reconfiguration system allowing the improvement of the efficiency of the same plant and the relevant installation, the main strength and w…

EngineeringRelation (database)business.industryPhotovoltaic systemControl reconfigurationSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciEnvironmental economicsInvestment (macroeconomics)Economic benefitsMaximum power point trackingSettore ING-IND/31 - ElettrotecnicaIncentivePv plantReconfiguration photovoltaic incentives policiesbusinessSettore ING-INF/07 - Misure Elettriche E Elettroniche2015 International Conference on Renewable Energy Research and Applications (ICRERA)
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Development details and performance assessment of a Wind Turbine Emulator

2016

This paper describes an experimental platform to emulate the static and dynamic behavior of real Wind Energy Conversion Systems (WECS). The Wind Turbine Emulator (WTE) consists of two coupled 1.5 kW squirrel-cage induction machines. The WTE calculations are performed on a PC and a DSP, both connected via USB. The total torque applied to the WTE motor is the difference of the scaled wind mechanical torque calculated on the PC, and the turbine inertia torque calculated on the DSP. An improved WTE shaft speed derivative has been used for the inertia torque calculation, which provides better results in terms of attenuation of the high-frequency harmonics present in the generator speed acquisiti…

EngineeringRenewable Energy Sustainability and the Environmentbusiness.industry020209 energymedia_common.quotation_subjectControl engineering02 engineering and technologyUSBInertiaTurbineAutomotive engineeringMaximum power point trackinglaw.inventionGenerator (circuit theory)lawHarmonics0202 electrical engineering electronic engineering information engineeringTorqueLow voltage ride throughbusinessmedia_commonRenewable Energy
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A simple and accurate model of photovoltaic modules for power system design

2014

EngineeringSIMPLE (military communications protocol)business.industryPhotovoltaic systemphotovoltaic arraysolar energyElectrical engineeringSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciPower system designMaximum power point trackingSolar micro-invertermodeling and simulationElectronic engineeringGrid-connected photovoltaic power systemrenewable energy sourcebusinessRooftop photovoltaic power station2014 Ninth International Conference on Ecological Vehicles and Renewable Energies (EVER)
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