Performance analysis of individual blade pitch control of offshore wind turbines on two floating platforms

Namik, Hazim; Stol, Karl

doi:10.1016/j.mechatronics.2010.12.003

Cited by 104 publications

(51 citation statements)

References 19 publications

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“…For minimization of platform movements, in this paper, we take into account only pitch movement y ppt for controller design, because the pitch motion will be most significant under the situation when the wind turbine is facing to the wind direction [13,14].…”

Section: Control Objectives For Region IIImentioning

confidence: 99%

“…As was explained in Section 3, the output signal is generator speed (y ω g ) and the state signals are rotor speed (ω r ), platform pitch angle (ppt) and platform pitch rate (ṗ pt). In this paper, whenever state-feedback is used, we assume that all the states are directly measurable by the available sensors [13,14]. Also, the reference signal y ω g ,ref is the reference for generator speed.…”

Section: Feedback Structure For Controller Designmentioning

confidence: 99%

“…As far as control of floating offshore wind turbines above rated wind speed, called Region III, is concerned, various blade pitch control methods were worked out such as state feedback, loop shaping and model predictive control [11][12][13][14]. Additionally, in [10,15], linear time-invariant controllers were designed based on the LPV model of floating offshore wind turbines.…”

Section: Introductionmentioning

confidence: 99%

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Gain-scheduling control of a floating offshore wind turbine above rated wind speed

Bagherieh

Nagamune

2015

Control Theory Technol.

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This paper presents an application of gain-scheduling (GS) control techniques to a floating offshore wind turbine on a barge platform for above rated wind speed cases. Special emphasis is placed on the dynamics variation of the wind turbine system caused by plant nonlinearity with respect to wind speed. The turbine system with the dynamics variation is represented by a linear parameter-varying (LPV) model, which is derived by interpolating linearized models at various operating wind speeds. To achieve control objectives of regulating power capture and minimizing platform motions, both linear quadratic regulator (LQR) GS and LPV GS controller design techniques are explored. The designed controllers are evaluated in simulations with the NREL 5 MW wind turbine model, and compared with the baseline proportional-integral (PI) GS controller and non-GS controllers. The simulation results demonstrate the performance superiority of LQR GS and LPV GS controllers, as well as the performance trade-off between power regulation and platform movement reduction.

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Section: Control Objectives For Region IIImentioning

confidence: 99%

Section: Feedback Structure For Controller Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gain-scheduling control of a floating offshore wind turbine above rated wind speed

Bagherieh

Nagamune

2015

Control Theory Technol.

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“…The solutions utilized to reduce wind turbines towers' vibration include collective blade pitch control, generator electromagnetic torque control [7][8][9], and passive, semi-active, or active tuned vibration absorbers (TVAs) [10][11][12][13]. TVAs are widely spread structural vibration reduction solutions for slender structures.…”

Section: Introductionmentioning

confidence: 99%

Study of vibration control using laboratory test rig of wind turbine tower-nacelle system with MR damper based tuned vibration absorber

Martynowicz¹

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Wind turbine tower dynamic stress is related to the fatigue wear and reliability of the whole wind turbine structure. This paper deals with the problem of tower vibration control using a specially designed and built laboratory model. The considered wind turbine tower-nacelle model consists of a vertically arranged stiff rod (representing the tower), and a system of steel plates (representing nacelle and turbine assemblies) fixed at its top. The horizontally aligned tuned vibration absorber (TVA) with magnetorheological (MR) damper is located also at the top of the rod (in nacelle system). Force excitation sources applied horizontally to the tower itself and to the nacelle were both considered. The MR damper real-time control algorithms, including ground hook control and its modification, sliding mode control, linear and nonlinear (cubic and square root) damping, and adaptive solutions are compared to the open-loop case with various constant MR damper input current values and system without MR TVA (i.e., MR TVA in "locked" state). Comprehensive experimental analyses and their results are presented.Key words: wind turbine vibration, tower-nacelle laboratory model, tuned vibration absorber, MR damper, tower vibration control.Study of vibration control using laboratory test rig of wind turbine tower-nacelle system with MR damper based tuned vibration absorber P. MARTYNOWICZ* AGH University of Science and Technology, Department of Process Control, 30 Mickiewicza Ave., 30-059 Krakow, Poland additional moving mass, spring and viscous damper, which parameters are tuned to the selected (most often first) mode of vibration [10,14]. Passive TVAs work well at the load conditions characterized with a single frequency to which they are tuned, but cannot adapt to wide excitation spectrum [15], thus more advanced TVAs are considered to change or tune TVA operating frequency. Among them, magnetorheological (MR) TVAs are placed [15], as using MR damper (instead of viscous damper) guarantees a wide range of resistance force, fast response times, low sensitivity to temperature change and fluid contamination, high operational robustness, and minor energy requirements as compared with active systems [16][17][18]. As simulations and experiments show, implementation of MR damper in TVA system may lead to further vibration reduction in relation with passive TVA (subject of author's separate publications).Within the scope of current project, tower-nacelle simulation and laboratory models (Figs. 1 and 2) were specially developed and built, in which all turbine components (nacelle, blades, hub, shaft, generator and possibly gearbox) are represented by nacelle concentrated mass and mass moments of inertia. The laboratory test rig of wind turbine tower-nacelle system offers the possibility of modeling tower vibration under various aerodynamic, hydrodynamic, mechanical unbalance, changeable electromagnetic load, and other excitation sources (listed above), since horizontal concentrated force (designated by F s (t)) generated by dedi...

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“…The solutions utilised to reduce vibration of wind turbine towers include collective pitch control, generator electromagnetic torque control, and passive/semiactive/active tuned vibration absorbers (TVAs) (Shan and Shan, 2012;Jelavić et al, 2007;Namik and Stol, 2011;Den Hartog, 1985;Oh and Ishihara, 2013;Tsouroukdissian et al, 2011;Rotea et al, 2010). TVAs are widely spread structural vibration reduction solutions for slender structures.…”

Section: Introductionmentioning

confidence: 99%

Implementation of the LQG controller for a wind turbine tower-nacelle model with an mr tuned vibration absorber

Rosół¹,

Martynowicz²

2016

jtam

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Vibration of a wind turbine tower is related to fatigue wear, influencing reliability of the whole structure. The current paper deals with the problem of Linear-Quadratic-Gaussian (LQG) tower vibration control using specially designed and built simulation and laboratory tower-nacelle models with a horizontally aligned, magnetorheological (MR) damper based tuned vibration absorber located at the nacelle. Force excitation applied horizontally to the tower itself, or to the nacelle, is considered. The MR damper LQG control algorithm, including the Kalman state observer and LQR (Linear-Quadratic-Regulator) controller is analysed numerically and implemented on the laboratory ground, in comparison with the system with a deactivated absorber. Simulation and experimental results are presented.

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Performance analysis of individual blade pitch control of offshore wind turbines on two floating platforms

Cited by 104 publications

References 19 publications

Gain-scheduling control of a floating offshore wind turbine above rated wind speed

Gain-scheduling control of a floating offshore wind turbine above rated wind speed

Study of vibration control using laboratory test rig of wind turbine tower-nacelle system with MR damper based tuned vibration absorber

Implementation of the LQG controller for a wind turbine tower-nacelle model with an mr tuned vibration absorber

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