Search results for "Floating wind turbines"

showing 3 items of 3 documents

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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Second-order hydrodynamic effects on the response of three semisubmersible floating offshore wind turbines

2020

Abstract Floating structures have become the most feasible solution for supporting wind turbines when offshore wind project move to deeper water. In this paper, a hydrodynamic analysis of three different semisubmersible floating offshore wind turbines is carried out including second-order hydrodynamic effects. The three examined platforms are V-shaped semisubmersible, Braceless semisubmersible and OC4-DeepCwind semisubmersible and are used to support the NREL 5 MW reference wind turbine. The main objective of the present study is to investigate and compare the hydrodynamic response of the three different semisubmersible floaters in two water depths (100 m, and 200 m) under different load co…

Environmental Engineering020209 energyHydrodynamic loadsOcean Engineering02 engineering and technology01 natural sciencesTurbineTransfer functionSemisubmersible floating wind turbines010305 fluids & plasmas0103 physical sciences0202 electrical engineering electronic engineering information engineeringWind powerSecond-order wave loadsbusiness.industryTension (physics)Newman's approximationMooringOffshore wind powerDragEngineering and TechnologybusinessFloating platformQuadratic transfer functionGeologyMarine engineeringOcean Engineering
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A comparative study on the dynamic response of three semisubmersible floating offshore wind turbines

2019

Abstract Currently, there is a great interest to globally develop offshore wind energy due to the greenhouse effect and energy crisis. Great efforts have been devoted to develop reliable floating offshore wind energy technology to exploit the wind energy resources in deep seas. This paper presents a comparative study of the dynamic response of three different semisubmersible floating wind turbine structures. All the three platforms support the same 5MW wind turbine. The platforms examined are: a V-shaped Semi, an OC4-DeepCwind Semi and a Braceless Semi at 200 m water depth. A dynamic analysis is carried out in order to calculate and compare the performance of these platforms. The comparison…

Wind powerEnvironmental EngineeringOff-shore wind energybusiness.industryComputingMethodologies_MISCELLANEOUSFloating systemsFloating offshore wind turbinesMooringRational motionsVDP::Teknologi: 500::Marin teknologi: 580Floating wind turbinesComparative studiesOffshore wind powerFundamental designRigid-body motionComputingMethodologies_DOCUMENTANDTEXTPROCESSINGEnvironmental scienceEngineering and TechnologybusinessMarine engineering
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