An investigation of variable speed horizontal-axis wind turbines using direct model-reference adaptive control

Freeman, Jacob; Balas, Mark J.

doi:10.2514/6.1999-28

Cited by 34 publications

(28 citation statements)

References 5 publications

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“…Researchers have developed methods for using adaptive control to compensate for unknown or time-varying parameters [34], [29], [31]. A few researchers have also begun to investigate the addition of feedforward control to improve the disturbance rejection performance when the incoming wind profile deviates from that expected [35], [36], [37], [38].…”

Section: Advanced Control Of Wind Turbinesmentioning

confidence: 99%

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A tutorial on the dynamics and control of wind turbines and wind farms

Pao

Johnson

2009

2009 American Control Conference

292

206

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Abstract-Wind energy is currently the fastest-growing energy source in the world, with a concurrent growth in demand for the expertise of engineers and researchers in the wind energy field. There are still many unsolved challenges in expanding wind power, and there are numerous problems of interest to systems and control researchers. In this paper, we first review the basic structure of wind turbines and then describe wind turbine control systems and control loops. Of great interest are the generator torque and blade pitch control systems, where significant performance improvements are achievable with more advanced systems and control research. We describe recent developments in advanced controllers for wind turbines and wind farms, and we also outline many open problems in the areas of modeling and control of wind turbines.

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Section: Advanced Control Of Wind Turbinesmentioning

confidence: 99%

“…Even if model errors are extremely small, the dynamical behavior of a wind turbine will change over time due wear, debris build up on the blades, environmental conditions, etc. As such, adaptive methods have been investigated to tune controllers to ensure "optimal" performance over all time [29], [30], [28], [20], [31].…”

Section: Issues In Wind Turbine Controlmentioning

confidence: 99%

A tutorial on the dynamics and control of wind turbines and wind farms

Pao

Johnson

2009

2009 American Control Conference

292

206

View full text Add to dashboard Cite

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“…Standard signal chasing arguments can then be used to prove that all signals remain bounded under closed-loop operation. In particular, from (12)…”

Section: Appendix 1: Proof Of Theoremmentioning

confidence: 99%

“…After taking the first time derivative of (27) and substituting (12), the following expression is obtaineḋ…”

Section: Appendix 1: Proof Of Theoremmentioning

confidence: 99%

“…Zhang et al [10] compared PID and fuzzy logic control in the control of the rotation of the wind wheel and reverse moment of the generator in a variable speed wind turbine and concluded that fuzzy logic control produce a smoother output with less susceptibility to disturbances. Adaptive control schemes [12][13][14][15] have been developed to eliminate some of the problems faced in wind turbine control, such as unknown and time varying model parameters in the wind turbine model. Song et al [15] used a model reference adaptive control scheme to force a wind turbine with a known power efficiency function, to track a desired rotor speed that maximises the energy captured by controlling the excitation winding voltage of the generator.…”

Section: Introductionmentioning

confidence: 99%

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Optimum seeking-based non-linear controller to maximise energy capture in a variable speed wind turbine

Iyasere

Salah

Dawson

et al. 2012

IET Control Theory Appl.

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Abstract:In this study, an optimum seeking-based robust non-linear controller is proposed to maximise wind energy captured by variable speed wind turbines at low-to-medium wind speeds. The proposed strategy simultaneously controls the blade pitch angle and tip-speed ratio, through the turbine rotor angular speed, to an optimal point at which the power coefficient, and hence the wind turbine efficiency, is maximum. The optimal points are given to the controller by an optimisation algorithm that seeks the unknown optimal blade pitch angle and rotor speed. The control method allows for aerodynamic rotor power maximisation without exact knowledge of the wind turbine model. A representative numerical simulation is presented to show that the wind turbine can be accurately controlled to achieve maximum energy capture.

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Direct adaptive torque control for maximizing the power captured by wind turbine in partial loading condition

2015

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In this paper, a direct adaptive control approach is used to track the tip speed ratio (TSR) of wind turbine to maximize the power captured during the below rated wind speed operation. Assuming a known optimum value of TSR, the deviation of actual TSR from the optimum one is mathematically expressed as TSR tracking error. Since the actual TSR is not a measurable quantity, this expression for TSR tracking error is linearized and simplified to express it in terms of wind speed and rotor speed, where rotor speed can easily be measured. Although it is possible to measure the wind speed with high accuracy using LiDAR, using it raises the overall cost of wind turbine installation; hence, a method to estimate the wind speed is also proposed. The adaptive controller operates on this simplified TSR tracking error to drive it to zero and to keep the TSR constant at desired optimum value. The performance of the proposed control scheme is illustrated by implementing and simulating it in the National Renewable Energy Laboratory 5MW wind turbine model and comparing the results with the existing baseline fixed gain controller. Copyright © 2015 John Wiley & Sons, Ltd.

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An investigation of variable speed horizontal-axis wind turbines using direct model-reference adaptive control

Cited by 34 publications

References 5 publications

A tutorial on the dynamics and control of wind turbines and wind farms

A tutorial on the dynamics and control of wind turbines and wind farms

Optimum seeking-based non-linear controller to maximise energy capture in a variable speed wind turbine

Direct adaptive torque control for maximizing the power captured by wind turbine in partial loading condition

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