Maximizing Wind Turbine Energy Capture Using Multivariable Extremum Seeking Control

Creaby, Justin; Li, Yaoyu; Seem, John E.

doi:10.1260/030952409789685753

Cited by 86 publications

(50 citation statements)

References 39 publications

(43 reference statements)

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“…However, it may not be known exactly and may also change with time due to blade erosion, residue buildup, etc. Online estimation of k t,opt for power maximization has been addressed in many works such as [5,[8][9][10], and is not a focus of this paper.…”

Section: @C P @Kmentioning

confidence: 99%

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Nonlinear Systems Analysis and Control of Variable Speed Wind Turbines for Multiregime Operation

Semrau

Rimkus

Das

2014

Journal of Dynamic Systems, Measurement, and Control

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The key control problems associated with variable speed wind turbines are maximization of extracted energy when operating below the rated wind speed, and power and speed regulation when operating above the rated wind speed. In this paper, we develop a non-linear systems framework to address these problems. The framework is used to visualize and analyze the equilibria of the wind turbine as its operating regimes and controllers change. For both below rated and above rated wind speeds, we adopt nonlinear control-lers, analyze the stability property of the resulting equilibria, and establish the criterion for switching between control regimes. Further, the regions of attraction of the resulting equilibria are determined, and the existence of a common region of attraction, which allows stable switching between operating regimes, is shown. The control input maintains continuity at the point of switching. We next provide a method for blade pitch modulation to control rotor speed at high wind speeds. Through Lyapunov stability analysis, we prove stability of the equilibria in the presence of the two independently functioning torque- and pitch-control feedback loops. Simulation results are presented and the con-troller is compared with existing works from the literature. [DOI: 10.1115/1.4028775]

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Section: @C P @Kmentioning

confidence: 99%

“…3). A significant amount of work has been reported in the literature for regime 2 operation where maximization of the extracted power is the main objective [5,[7][8][9][10]. Typical control designs maintain the wind turbine at a specific optimal operating point.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Systems Analysis and Control of Variable Speed Wind Turbines for Multiregime Operation

Semrau

Rimkus

Das

2014

Journal of Dynamic Systems, Measurement, and Control

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“…This control method was inspired by [9], which used ESC for an individual turbine. That ESC does not require a high-fidelity wind farm model nor high-bandwidth wind speed measurements is critical for this application.…”

Section: Existing Strategiesmentioning

confidence: 99%

Assessment of Extremum Seeking Control for Wind Farm Energy Production

Johnson

Fritsch²

2012

Wind Engineering

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Aerodynamic interaction among turbines grouped together in wind farms causes a decrease in the total energy extracted from the wind when compared to an equal number of widely dispersed turbines operating under the same wind input conditions as the wind farm.Extremum seeking control (ESC) is one strategy that holds promise for reducing this impact under certain wind input conditions. In this paper, we evaluate the effectiveness of ESC under different turbulence conditions, describing methods for addressing the complexities caused by the turbulent wind input and time-varying delay of the wind between turbines, where these two elements are the most important contributions compared to other wind farm control research. The results show that energy capture can be increased in low turbulence intensity conditions, but perhaps not in high turbulence conditions. K Ke ey yw wo or rd ds s : : wind energy, extremum seeking control

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“…ESC is applicable in situations where there is nonlinearity in the control problem, and the nonlinearity has local minimum or a maximum. Journal of Power and Energy Engineering Creaby et al [9] used ESC method to maximize the rotor mechanical power.…”

Section: Introductionmentioning

confidence: 99%

Power Maximization and Control of Variable-Speed Wind Turbine System Using Extremum Seeking

Rafaat¹,

Hussein²

2018

JPEE

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Maximizing the power capture is an important issue to the turbines that are installed in low wind speed area. In this paper, we focused on the modeling and control of variable speed wind turbine that is composed of two-mass drive train, a Squirrel Cage Induction Generator (SCIG), and voltage source converter control by Space Vector Pulse Width Modulation (SPVWM). To achieve Maximum Power Point Tracking (MPPT), the reference speed to the generator is searched via Extremum Seeking Control (ESC). ESC was designed for wind turbine region II operation based on dither-modulation scheme. ESC is a model-free method that has the ability to increase the captured power in real time under turbulent wind without any requirement for wind measurements. The controller is designed in two loops. In the outer loop, ESC is used to set a desired reference speed to PI controller to regulate the speed of the generator and extract the maximum electrical power. The inner control loop is based on Indirect Field Orientation Control (IFOC) to decouple the currents. Finally, Particle Swarm Optimization (PSO) is used to obtain the optimal PI parameters. Simulation and control of the system have been accomplished using MATLAB/Simulink 2014.

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Maximizing Wind Turbine Energy Capture Using Multivariable Extremum Seeking Control

Cited by 86 publications

References 39 publications

Nonlinear Systems Analysis and Control of Variable Speed Wind Turbines for Multiregime Operation

Nonlinear Systems Analysis and Control of Variable Speed Wind Turbines for Multiregime Operation

Assessment of Extremum Seeking Control for Wind Farm Energy Production

Power Maximization and Control of Variable-Speed Wind Turbine System Using Extremum Seeking

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