Two LQRI based Blade Pitch Controls for Wind Turbines
Sungsu Park,Yoonsu Nam +1 more
TLDR
In this article, a separate set of collective and individual pitch control algorithms were proposed to control rotor speed and blade bending moments at the same time to improve the trade-off between rotor speed regulation and load reduction.Abstract:
As the wind turbine size has been increasing and their mechanical components are built lighter, the reduction of the structural loads becomes a very important task of wind turbine control in addition to maximum wind power capture. In this paper, we present a separate set of collective and individual pitch control algorithms. Both pitch control algorithms use the LQR control technique with integral action (LQRI), and utilize Kalman filters to estimate system states and wind speed. Compared to previous works in this area, our pitch control algorithms can control rotor speed and blade bending moments at the same time to improve the trade-off between rotor speed regulation and load reduction, while both collective and individual pitch controls can be designed separately. Simulation results show that the proposed collective and individual pitch controllers achieve very good rotor speed regulation and significant reduction of blade bending moments.read more
Citations
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Journal ArticleDOI
State-of-the-art in wind turbine control: Trends and challenges
Jackson G. Njiri,Dirk Söffker +1 more
TL;DR: In this paper, a review of various control strategies that are used in wind turbine systems, both in low and high wind speed regions focusing primarily on multi-objective control schemes is presented.
Journal ArticleDOI
Pitch control for wind turbine systems using optimization, estimation and compensation
Richie Gao,Zhiwei Gao +1 more
TL;DR: In this paper, a novel pitch control approach is developed by integrating optimization, delay-perturbation estimation, and signal compensation techniques, which can effectively improve the pitch control performance in the real-time wind turbine energy conversion system.
Journal ArticleDOI
Dependable power extraction in wind turbines using model predictive fault tolerant control
TL;DR: A fault tolerant model predictive control scheme is proposed for wind turbines in the partial-load region to meet the control objectives in the presence of disturbances, uncertainties, sensor and actuator faults.
Journal ArticleDOI
Design and Verification of the LQR Controller Based on Fuzzy Logic for Large Wind Turbine
Taesu Jeon,Insu Paek +1 more
TL;DR: In this paper, a linear quadratic regulator based on the fuzzy logic (LQRF) control algorithm for a variable-speed variable-pitch wind turbine was designed, and to verify the optimum performance of the controller, simulations and wind tunnel tests were conducted.
Proceedings ArticleDOI
Advanced control of wind turbines: Brief survey, categorization, and challenges
TL;DR: In this article, some basic concepts related to the control of wind turbines are introduced, a control-theoretic categorization is proposed, the literature of wind turbine control is briefly surveyed, and some challenges are determined from the literature at the end.
References
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TL;DR: An overview of the common basic linear control approaches are provided and then more advanced control architectures are described and why they may provide significant advantages.
ReportDOI
Modern Control Design for Flexible Wind Turbines
TL;DR: In this article, the authors apply modern state-space control design methods to a two-bladed teetering hub upwind machine at the National Wind Technology Center (NWTC), which is managed by the U.S. Department of Energy's National Renewable Energy Laboratory (NREL).
Journal ArticleDOI
Control of variable speed wind turbines: Design task
W.E. Leithead,B. Connor +1 more
TL;DR: In this paper, the authors investigate the design of the control system (as opposed to the synthesis of the controller) for variable speed wind turbines, to cater for the implementation issues of accommodation of variation in the plant d...
Journal ArticleDOI
Feedback–feedforward individual pitch control for wind turbine load reduction
TL;DR: In this article, the problem of wind turbine fatigue load reduction by means of individual pitch control (IPC) is addressed by using a two-degree-of-freedom structure consisting of an optimal multivariable LQG controller and a feedforward disturbance rejection controller based on estimated wind speed signals.
Journal ArticleDOI
Optimization of variable speed wind power systems based on a LQG approach
TL;DR: In this article, an optimal control structure for variable speed fixed pitch wind turbines is presented, defined by the tradeoff between the energy conversion maximization and the control input minimization that determines the mechanical stress of the drive train.