Results 261 to 270 of about 383,309 (303)

Individual Pitch Control of Horizontal Axis Wind Turbines

Journal of Offshore Mechanics and Arctic Engineering, 2012
An individual pitch controller (IPC) based on the multivariable Linear Quadratic Gaussian (LQG) concept is presented to reduce loads in megawatt-size wind turbines. Most turbines currently installed use collective pitch control to pitch the blades in order to limit the excess of wind power and to regulate the rotor speed above rated conditions. However,
Sandquist, Fredrik, Moe, Geir, Anaya-Lara, Olimpo   +2 more
openaire   +2 more sources

Wind turbine system identification and individual pitch control

2017 American Control Conference (ACC), 2017
This paper addresses system identification and control for the wind turbine operating in region 3, where the wind is excessive and blades must pitch to regulate the rotor speed and alleviate the bending moments on the blades. This region is critical for safe operation of the wind turbine.
Sandeep Rai, null Shih-Yu Yang, Tsu-Chin Tsao   +2 more
openaire   +1 more source

A review of individual pitch control for wind turbines

2016 IEEE 11th Conference on Industrial Electronics and Applications (ICIEA), 2016
This paper summarizes current research and applications of wind turbine individual pitch control, reviews the basic concepts and working principles of individual pitch control methods, analyses the individual pitch control strategies for reducing the load, and mitigating grid voltage fluctuations, finally, the possible development prospects of wind ...
Zhihon Jiang, Zhe Chen, Wenzhou Liu, Yang Liu, Xiuyan Wang   +4 more
openaire   +2 more sources

Stochastic wind turbine modeling for individual pitch control

2009 European Control Conference (ECC), 2009
By pitching the blades of a wind turbine individually it is possible to attenuate the asymmetric loads caused by a non-uniform wind field - this is denoted individual pitch control. In this work we investigate how to set up a simplified stochastic and deterministic description of the wind and a simplified description of the aerodynamics with sufficient
Sven Creutz Thomsen, Henrik Niemann, Niels Kjolstad Poulsen   +2 more
openaire   +1 more source

Identification of wind turbine model for individual pitch controller design

2008 43rd International Universities Power Engineering Conference, 2008
The use of wind power has been increasing rapidly over last few decades and according to all predictions this trend is likely to continue. At the same time need for better cost effectiveness of wind power plants has stimulated growth in wind turbines' size and rated power.
Jelavić, Mate, Petrović, Vlaho, Perić, Nedjeljko   +2 more
openaire   +2 more sources

Study on Control Strategy of Individual Blade Pitch-Controlled Wind Turbine

2006 6th World Congress on Intelligent Control and Automation, 2006
With the scale of wind turbines being enlarged, troubles caused by the blades flapping became much more apparent. By researching on the aerodynamic characteristics of the wind turbine and simulating in Fluent software, the force curves on the blade element were got at different wind speeds and different pitch angles.
null Hongwei Liu, null Yonggang Lin, null Wei Li   +2 more
openaire   +1 more source

Individual Blade Pitch Control for the Controls Advanced Research Turbine (CART)

Journal of Solar Energy Engineering, 2006
Pitching the individual blades of a horizontal-axis wind turbine allows control of asymmetric aerodynamic loads, which in turn influences structural loads in the nonrotating frame such as tower side-side bending. These loads are not easily controlled by traditional collective pitch algorithms.
Karl Stol, Wenxin Zhao, Alan Wright
openaire   +1 more source

Research on individual pitch control below rated wind speed

IEEJ Transactions on Electrical and Electronic Engineering, 2016
The structure of the modern wind turbine is becoming larger and more complex, with the wind rotor exceeding hundreds of meters in diameter. The blade shear force is also becoming increasingly serious below the rated wind speed, which leads to structure fatigue loads and instability of the generator power.
Bing Han, Lawu Zhou
openaire   +1 more source

Individual pitch control strategy on alleviating periodic load fluctuations

2015 IEEE International Conference on Cyber Technology in Automation, Control, and Intelligent Systems (CYBER), 2015
Considering the periodic load fluctuations of wind turbine caused by wind shear and tower shadow, the individual pitch control strategy is proposed in this paper. According to the wind model of wind shear and tower shadow, the individual pitch control based on azimuth angle and load feedback is discussed, the blade flapwise load feedback is ...
Haoming Liu, Qiaoqiao Tang, Yao Wang, Xiaoling Yuan   +3 more
openaire   +1 more source

Individual pitch control of wind turbines: Model-based approach

Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 2013
Significant fore-and-aft tower vibrations of large wind turbines due to wind shear can be reduced using individual pitch control, in which the pitch angle of each blade is adjusted individually. A short survey of the existing individual pitch control strategies is presented, and a new architecture with preview measurements of the wind speeds at ...
Alexander Stotsky, Bo Egardt
openaire   +1 more source