A wind turbine, a method for compensating for disparities in a wind turbine rotor blade pitch system and use of a method

A wind turbine and pitch technology, applied in the control of wind turbines, wind turbines, machines/engines, etc., can solve problems such as wind turbine fatigue, rotor blade deterioration control, etc., and achieve the effect of optimizing performance

Inactive Publication Date: 2010-07-07
VESTAS WIND SYST AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A problem with the system is that the varying parameters may lead to a deteriorated control of the rotor blades and thus unnecessary fatigue in the wind turbine

Method used

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  • A wind turbine, a method for compensating for disparities in a wind turbine rotor blade pitch system and use of a method
  • A wind turbine, a method for compensating for disparities in a wind turbine rotor blade pitch system and use of a method
  • A wind turbine, a method for compensating for disparities in a wind turbine rotor blade pitch system and use of a method

Examples

Experimental program
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Embodiment Construction

[0056] figure 1 A modern wind turbine 1 is shown with a tower 2 and a wind turbine nacelle 3 arranged on top of the tower.

[0057] A wind turbine rotor comprising at least one blade (eg three wind turbine blades 5 shown) is connected to the hub 4 via a pitch mechanism 6 . Each pitch mechanism includes a blade bearing and a pitch adjustment device to pitch the blade. The pitching process is controlled by the pitch controller.

[0058] As shown in the figure, wind force above a certain level pushes the rotor and enables it to spin in a direction perpendicular to the wind force. This rotational motion is converted into electrical power, typically supplied to the utility grid, as is well known to those skilled in the art.

[0059] One main task of the pitch mechanism 6 of a wind turbine is to turn the rotor blades 5 around their length and for various embodiments of the wind turbine the pitch system is a hydraulic system.

[0060] For other embodiments of the wind turbine, th...

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PUM

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Abstract

The invention relates to a wind turbine comprising a rotor including one or more rotor blades, a pitch system for controlling the pitch angle of said one or more rotor blades, said pitch system comprises at least one pitch actuator, a pitch controller for generating pitch actuator control signals and sensor elements for establishing values of pitch performance parameters, and a compensation controller to compensate for disparities between said pitch actuator control signals and said values of pitch performance parameters, according to a control algorithm. The the compensation controller is arranged to adjust parameters of the control algorithm of said compensation controller in dependency of said disparities. Furthermore the invention relates to a method for compensating for disparities in a wind turbine rotor blade pitch system and use of a method.

Description

technical field [0001] The present invention relates to a wind turbine having a rotor comprising one or more rotor blades, a method for compensating for disparities in a wind turbine rotor blade pitch system and the use of the method. Background technique [0002] Pitch actuators for controlling the pitch angle of one or more rotor blades of a wind turbine are known in the art. [0003] Individual rotor blades are subject to inconsistencies caused, for example, by production variances in the governor, various tolerances in the pitch adjuster assembly, variations in blade bearing friction (e.g., caused by installation differences, temperature variations, or blade yaw changes), changes in air density, yaw errors from wind conditions, wind shear, temperature changes, changing wind speeds, etc. This pitch system can therefore be regarded as a nonlinear system with varying parameters. [0004] One problem with said system is that said varying parameters may lead to a deteriorat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/04
CPCF03D7/024F05B2270/1095Y02E10/723F03D7/046F05B2270/602F05B2270/705F03D7/045F05B2270/404F05B2270/604F03D7/0224Y02E10/72
Inventor 保罗·勃兰特·克里斯滕森
Owner VESTAS WIND SYST AS
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