Proceedings ArticleDOI
Individual pitch control strategy of wind turbine to reduce load fluctuations and torque ripples
TLDR
In this paper, an individual pitch control strategy based on the pitch angle signal adjusted jointly by wind turbine output power and rotor azimuth angle is proposed to smooth blade load fluctuation, diminish aerodynamic torque ripple, reduce rotor fatigue damage, and prolong life time of wind turbine.Abstract:
Wind velocity distribution differences in wind wheel rotation plane caused by wind shear and tower shadow, not only causes load fluctuations of wind turbine blades, but also leads to pulsations of wind turbine aerodynamic torque and output power. In order to reduce the influence of wind shear and tower shadow on the fluctuations of three-bladed wind turbine, an individual pitch control strategy based on the pitch angle signal adjusted jointly by wind turbine output power and rotor azimuth angle is proposed. A band-pass filter is designed to filter out the three times pulsating component of the wind turbine output power, and a PID controller is used to obtain regulatory signal of pitch angle, which is then converted to tiny variable of each blade combining with the azimuth angle signal and superimposed to the reference pitch angle of the collective pitch control. Simulation results on GH Bladed platform show that the proposed individual pitch control strategy is effective to smooth blade load fluctuation, diminish aerodynamic torque ripple, reduce rotor fatigue damage, and prolong life time of wind turbine.read more
Citations
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Journal ArticleDOI
Ultimate loads and response analysis of a monopile supported offshore wind turbine using fully coupled simulation
TL;DR: In this paper, a subset of ultimate limit state load cases proposed by the IEC 61400-3 standard is systematically analyzed, and the relative severity among the load cases to identify the most critical among them.
Proceedings ArticleDOI
Design of a Gain Scheduling Pitch Controller for Wind Turbines by Using the Bode Diagram
TL;DR: In this paper, the authors proposed a nonlinear PI gain scheduling controller for variable speed wind turbines operating in the full load range, which is particularly suitable for compensating the nonlinear rotor behavior and is widely used in wind turbines.
Proceedings ArticleDOI
Load Comparison Between Two Controlling Strategies for Wind Energy Conversion System Power-Boosting
TL;DR: In this paper , a gain scheduled proportional-integral (PI) controller is proposed to boost the wind energy conversion system power through two strategies: increasing the generator angular velocity and increasing the load torque of the generator.
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