Search results for "Wind turbine"

showing 10 items of 73 documents

Robust output feedback ℌ<inf>∞</inf> control synthesis with pole placement for offshore wind turbine system: An LMI…

2012

This paper deals with output ℌ ∞ control synthesis for a linear parameter-varying model of a floating wind turbine. A nonlinear model is introduced and linearized to obtain a linear model for each desired azimuth angle using the wind turbine software FAST. The main contributions of this paper are threefold. Firstly, the family of linear models are represented based on an affine parameter-varying model structure. Secondly, the bounded parameter-varying parameters are removed using upper bounded inequalities in the control design process. Thirdly, the control problem is formulated in terms of linear matrix inequalities (LMIs). The simulation results show a comparison between a controller desi…

EngineeringOffshore wind powerMathematical optimizationbusiness.industryControl theoryLinear systemFull state feedbackLinear modelFloating wind turbineRobust controlbusinessTurbine2012 IEEE International Conference on Control Applications
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Linear parameter‐varying modelling and control of an offshore wind turbine with constrained information

2014

This study deals with linear parameter-varying modelling and output-feedback H ∞ control design for an offshore wind turbine. The controller is designed with consideration that not all the information in the feedback loop will be used. This constraint is incorporated into the design procedure. Constrained information means that a special zero-non-zero pattern is forced upon the gain matrix. The constrained controller is obtained based on parameter-dependent Lyapunov functions and formulated in terms of linear-matrix inequalities. Since the functions are dependent on the wind speed and accurate wind speed measurements are rarely available in practice, an extended Kalman filter is used to est…

EngineeringOperating pointControl and OptimizationWind powerbusiness.industryBlade pitchOpen-loop controllerDrivetrainComputer Science Applications1707 Computer Vision and Pattern RecognitionControl engineeringControl and Systems Engineering; Human-Computer Interaction; Computer Science Applications1707 Computer Vision and Pattern Recognition; Control and Optimization; Electrical and Electronic EngineeringWind speedComputer Science ApplicationsHuman-Computer InteractionOffshore wind powerControl and Systems EngineeringControl theoryElectrical and Electronic EngineeringbusinessLPV modeling constrained information H1 control wind turbine.IET Control Theory & Applications
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Modeling of Wind Turbine Gearbox Mounting

2011

In this paper three bushing models are evaluated to find a best practice in modeling the mounting of wind turbine gearboxes. Parameter identification on measurements has been used to determine the bushing parameters for dynamic simulation of a gearbox including main shaft. The stiffness of the main components of the gearbox has been calculated. The torsional stiffness of the main shaft, gearbox and the mounting of the gearbox are of same order of magnitude, and eigenfrequency analysis clearly reveals that the stiffness of the gearbox mounting is of importance when modeling full wind turbine drivetrains.

EngineeringParameter identificationbusiness.industryDrivetraingearbox mountingStructural engineeringTurbinelcsh:QA75.5-76.95Computer Science ApplicationsDynamic simulationwind turbineControl and Systems EngineeringModeling and SimulationBushinglcsh:Electronic computers. Computer sciencebusinessSoftwareModeling, Identification and Control
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Semiactive control for floating offshore wind turbines subject to aero-hydro dynamic loads

2011

Wind and wave dynamic loads might cause undesirable vibrations that affect the structure integrity and system performance of floating offshore wind turbines. This paper addresses the problem of dynamic load mitigation by using semiactive control techniques with the tuned liquid column dampers placed on the turbine’s tower. The control law is formulated based on the mixed H2/H∞ methods for ensuring the system stability and reliability. Furthermore, the proposed controller only uses output feedback so as to avoid the dependence on the knowledge of the states of the system. Peer Reviewed

EngineeringRenewable Energy Sustainability and the Environmentbusiness.industryEnergy Engineering and Power TechnologyTurbineFloating wind turbinesDynamic load testingDamperVibrationOffshore wind powerReliability (semiconductor)Control theory:Energies::Recursos energètics renovables [Àrees temàtiques de la UPC]Electrical and Electronic EngineeringbusinessTowerOffshore wind energyEnergies renovables -- Producció
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Analysis of the maximization of wind turbine energy yield using a continuously variable transmission system

2017

Abstract In this paper, an analytic study of the subject of mechanical power transmission in HAWT wind turbine has been carried out. For the most part, the study analyzes the use of continuously variable transmission (CVT) in order to allow the turbine and the electric generator to couple, allowing in turn, an unremitting transmission ratio adjustment. In low-wind sites, the design criteria suggest an oversizing of the wind turbine in order to generate adequate electrical power even at low wind speed. The proposed solution enhances the space of operating points since it allows the electric generator to release the rotational speed from the turbine one (limited due to structural integrity). …

EngineeringRenewable energyWind powerRenewable Energy Sustainability and the Environmentbusiness.industry020209 energyElectric generator02 engineering and technologyTurbineWind speedAutomotive engineeringlaw.inventionRenewable energyPower optimizerDirect-drive turbinelawSettore ING-IND/17 - Impianti Industriali Meccanici0202 electrical engineering electronic engineering information engineeringElectric powerbusinessCVTSettore ING-IND/15 - Disegno E Metodi Dell'Ingegneria IndustrialeWind turbineContinuously variable transmission
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Small Wind Technology Diffusion in Suburban Areas of Sicily

2015

Among renewable energy resources, wind energy became more attractive in the last decade. Wind farm installations dramatically increased in areas where climatic conditions, topography, and environment have allowed their development. The installation of wind turbines, usually carried out in remote areas, recently began to cover areas identified by a complex terrain such as urban and suburban zones. Although these new plant choices are characterized by lower productivity, there is increasing interest in wind energy production in both urban and suburban areas. In this work the authors have carried out an energy analysis developed from a sample of small wind turbines available on the market. Thi…

EngineeringSmall wind turbineMeteorologyGeography Planning and DevelopmentTJ807-830Context (language use)TerrainManagement Monitoring Policy and LawTD194-195Civil engineeringTurbineRenewable energy sourceswind turbineswind energyGE1-350Settore ING-IND/11 - Fisica Tecnica AmbientaleWind powerLand useEnvironmental effects of industries and plantsRenewable Energy Sustainability and the Environmentbusiness.industryrenewable energyRenewable energyEnvironmental sciencesOffshore wind powerbusinessWind turbineenergySustainability
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Modeling of a Smart Grid System Using Real Time Data οn Neplan

2013

The Institute for Energy and Transport (IET) is one of the seven institutes of the Joint Research Centre, which is a Directorate-General of the European Commission. IET is based both in Petten, the Netherlands, and Ispra, Italy, and has a multidisciplinary team of around three hundred academic, technical and support staff members. The mission of IET is to provide support to European Union policies in order to ensure sustainable, safe, secure and efficient energy production, distribution and use. The Energy Security Unit (ESU) is part of IET based in Petten and Ispra. A research action set up within this unit is devoted to studies on smart electricity systems (SES) and operates a Smart Grids…

EngineeringSmall wind turbineWind powerbusiness.industryPhotovoltaic systemElectrical engineeringGridAutomotive engineeringSmart grid laboratory NEPLAN modelSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSmart gridReal-time dataDiesel generatorbusinessEnergy (signal processing)
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Experimental characterization of a wind generator prototype for sustainable small wind farms

2016

This paper presents the experimental characterization of a wind turbine prototype used for micro wind farms. The proposed prototype, whose advantages can be summarized in versatility of application, low noise and compactness, can generate 1 kW of rated power for a wind speed equal to 4 m/s. The tests here reported and carried out by means of an experimental test bench confirm that the prototype is well designed and adequate for the purpose of its application.

EngineeringTest benchWind generatorMechanical engineeringEnergy Engineering and Power Technology02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciMicro wind turbineTurbineAutomotive engineeringWind speedWind farm0203 mechanical engineering0202 electrical engineering electronic engineering information engineeringPMSMbusiness.industryRenewable Energy Sustainability and the EnvironmentExperimental characterization020208 electrical & electronic engineering020302 automobile design & engineeringCharacterization (materials science)Low noiseSettore ING-IND/31 - ElettrotecnicaPower ratingbusinessSettore ING-INF/07 - Misure Elettriche E Elettroniche
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Optimum Performance of Permanent Magnet Synchronous Generators Coupled to Wind Turbines

2007

In this paper a control algorithm for the efficiency improvement of permanent magnet synchronous generators (PMSG) is presented. The proposed algorithm reduces the losses of the generator without affecting its performances. In details, after a description of a dynamic model of the PMSG, which has been purposely modified in order to take into account the iron losses, the basic equations and the constraints to obtain the loss minimization are presented and discussed. Some simulations of a specific PMSG employing the proposed algorithm are performed. The results of these simulations show that enhancement of the efficiency up to 3% can be reached in comparison to a PMSG using a traditional cont…

EngineeringWind powerControl algorithmbusiness.industryPermanent magnet synchronous generatorSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciGenerator (circuit theory)Control theoryPermanent magnets Synchronous generators Couplings Wind turbines Iron Rotors Mechanical variables control Minimization methods Mathematical model TorqueMagnetTorqueLoss minimizationbusinessMachine control2007 IEEE Power Engineering Society General Meeting
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Sensorless small wind turbine with a sliding-mode observer for water heating applications

2015

Water heating applications consume a considerable portion of electricity demand in most of countries. Small wind turbines are one of attractive alternatives for grid electricity based water heating systems. Wind energy can be converted to heat energy in a high efficient manner. However it is essential that wind turbine based water heating systems should be economical and reliable. Maximum power point tracking algorithm of most of available wind turbines requires information from a wind speed sensor and a rotor speed sensor which reduces the reliability of the system. In this paper, the proposed 5 kW wind turbine does not require external wind speed sensors and rotor speed sensors. The syste…

EngineeringWind powerSmall wind turbineWind turbine controlWater heating systembusiness.industrySensorless controlTurbineWind speedMaximum power point trackingIndustrial and Manufacturing EngineeringPower (physics)Power optimizerStand-alone power systemControl theorySensorless control; Sliding-mode observer; Water heating system; Wind turbine control; Electrical and Electronic Engineering; Industrial and Manufacturing EngineeringElectrical and Electronic EngineeringbusinessSliding-mode observer
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