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Individual pitch control method and individual pitch control device of wind generation set

An independent pitch and wind turbine technology, which is applied in the control of wind turbines, wind energy power generation, wind turbines, etc., can solve the problems of complex control, and achieve the effects of simple and reliable control, low cost, and long service life.

Active Publication Date: 2013-10-16
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for independent pitch change of wind turbines to solve the problem of complex control of current independent pitch control methods

Method used

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  • Individual pitch control method and individual pitch control device of wind generation set
  • Individual pitch control method and individual pitch control device of wind generation set

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] like figure 1 As shown, the controller adopts PLC, and the internal functional modules of the PLC should include the wind rotor blade azimuth angle calculation module, the wind rotor azimuth angle reliability verification module, and the independent pitch control module, and the PLC sampling connection is used to measure the wind rotor azimuth angle. The controller, the proximity sensor switch used to verify the azimuth angle of the wind rotor, the PLC output is connected to the independent pitch driver, and the independent pitch driver is connected to the pitch motor. The proximity sensor switch is installed on the main frame near the main shaft flange, and the supporting block of the proximity sensor switch is installed at the position of the main shaft flange, and rotates with the main shaft to ensure that the switch can sense the block normally. T...

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Abstract

The invention relates to an individual pitch control method and an individual pitch control device of a wind generation set. The individual pitch control method comprises the steps as follows: 1), an azimuth angle of a wind wheel is measured; 2), azimuth angles of all wind wheel blades are calculated according to the azimuth angle of the wind wheel; 3), an individual pitch formula for the wind wheel blades is set; and 4), individual pitch angles for the wind wheel blades are calculated according to the individual pitch formula for the wind wheel blades, and individual pitch of blades of the wind generation set is realized. The individual pitch control method and the individual pitch control device have the benefits as follows: on the basis of a simple improvement on a conventional non-individual pitch wind generation set, an individual pitch control function can be realized, so that the fatigue loads of the blades of a fan can be reduced properly, the service life of the set is prolonged, the control is simple and reliable, and the cost is low.

Description

technical field [0001] The invention relates to an independent pitch change method and an independent pitch control device for a wind turbine. Background technique [0002] At present, the pitch control technology of large wind turbines generally still adopts the control technology of synchronous pitch of three blades, and the angles of the three blades are consistent during the rotation of the wind rotor. However, due to the difference in wind speed in the vertical direction, the wind rotor will be unbalanced in different directions, and the unbalanced load on the wind rotor will cause serious damage to key components such as pitch bearings, hubs, towers, and main bearings. A large fatigue load will reduce the service life of the unit and increase the cost of the whole fan. The independent pitch control method will control the blades to have different pitch angles in different orientations, so that the force on the wind rotor in different orientations will be balanced, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/04
CPCY02E10/723Y02E10/72Y02P70/50
Inventor 王朝东卢仁宝谢金娟李松博王建伟张朋朋
Owner STATE GRID CORP OF CHINA
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