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Wind turbine damping of tower resonant motion and symmetric blade motion using estimation methods

A technology of resonant motion and wind turbine, which is applied in the direction of wind turbines, wind turbines, and wind turbine components in the same direction as the wind. It can solve the problems of increased phase and gain errors and difficult control, and achieve the effect of reducing 3P motion

Inactive Publication Date: 2010-01-13
CLIPPER WINDPOWER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A 3P notch that is close to bandpass in frequency adds its phase and gain errors to the final output, making control difficult

Method used

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  • Wind turbine damping of tower resonant motion and symmetric blade motion using estimation methods
  • Wind turbine damping of tower resonant motion and symmetric blade motion using estimation methods
  • Wind turbine damping of tower resonant motion and symmetric blade motion using estimation methods

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Embodiment Construction

[0037] refer to figure 1 , which is a block diagram of a variable speed wind turbine plant according to the invention. A wind power plant includes a turbine with one or more generators housed in a pod 100 mounted on top of a tall tower structure 102 anchored to the ground 104 . The pod 100 rests on the angle of attack platform 101 and is free to rotate about the angle of attack pivot 106 in the horizontal plane and remains in the path of the prevailing wind flow.

[0038] The turbine has a rotor with pitched blades 112 , 114 connected to a rotor hub 118 . These blades turn in response to wind currents. Each of the blades may have a root section and a blade extension section such that the length of the rotor is variable to provide a variable diameter rotor. As described in US Pat. No. 6,726,439, the rotor diameter can be controlled to fully extend the rotor at low flow rates and to retract the rotor as flow rates increase such that the loads transmitted by or placed on the ...

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PUM

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Abstract

A wind turbine tower load control method. The pitch of the rotor blades is controlled in a conventional manner by a collective command component. An estimator estimates the tower resonant acceleration and the thrice-per-revolution blade imbalance acceleration. Combining logic, connected to the estimated resonant acceleration and to the estimated thrice-per-revolution (3P) acceleration provides a combined pitch modulation to damp the tower resonant motion and the thrice-per-revolution motion using collective modulation. Said pitch modulation is combined with the collective command component to drive the pitch actuators.

Description

[0001] Cross References to Related Applications [0002] This application relates to Kitchener Clark Wilson, William Erdman and Timothy J. McCoy entitled "Wind Turbine With Blade Pitch Control To Compensate For Wind Shear And Wind Misalignment (Wind Turbine With Blade Pitch Control To Compensate For Wind Shear And Wind Misalignment)", US Patent Application No. 60 / 849,160, filed October 2, 2006, assigned to ClipperWindpower Technology, Inc., and incorporated herein by reference. technical field [0003] The present invention relates to tower structures, such as wind turbine towers, and more particularly to attenuating the main resonant frequency of the turbine by adjusting the blade pitch angle while maintaining rated torque or power. Background technique [0004] Large modern wind turbines have rotor diameters of up to 100 meters, giving the towers the height to accommodate them. In the United States, for some places, such as the American Great Plains, tall towers are bein...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02F03D11/04
CPCY02E10/723F03D7/046F05B2270/101F03D7/0224F05B2270/706F03D7/0296F05B2260/96Y02E10/72F05B2270/334F05B2240/2021Y02E10/728F03D11/04F05B2260/821Y02E10/721F03D13/20F03D1/06
Inventor K·C·威尔森
Owner CLIPPER WINDPOWER INC
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