Wind turbine speed control method and device

A technology of wind turbine speed control, applied in the control of wind turbines, monitoring of wind turbines, wind turbines, etc., which can solve problems such as inaccurate resonance zones, threats to the safety and reliability of wind turbine generators, and difficulties in resonance zones , to achieve the effect of ensuring stable operation, improving reliability and power generation, reducing torque jump and overspeed faults

Active Publication Date: 2022-07-12
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

However, due to different configurations of wind turbines, wind turbines with the same configuration in different wind farms, wind turbines at different locations in the same wind farm, etc., there are large differences in tower frequencies, which brings about artificial pre-defined resonance bands. It is very difficult; and due to the complexity of the actual working conditions and other reasons, there is usually a large difference between the resonance zone determined by simulation and the resonance zone in the actual operation of the wind turbine
This Inaccurate Resonance Band Threatens Wind Turbine Safety and Reliability

Method used

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  • Wind turbine speed control method and device
  • Wind turbine speed control method and device
  • Wind turbine speed control method and device

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Embodiment Construction

[0019] The present invention may have various modifications and various embodiments, and it should be understood that the present invention is not limited to these embodiments, but includes all modifications, equivalents, and substitutions within the spirit and scope of the present invention. The terms used in the exemplary embodiments of the present invention are used to describe the particular embodiment only, and not to limit the exemplary embodiment. The singular forms used herein are intended to include the plural forms as well, unless the context clearly dictates otherwise.

[0020] figure 1 is a speed-torque control graph showing the speed avoidance strategy of the wind turbine.

[0021] refer to figure 1 , the horizontal axis is the rotational speed w of the wind turbine, and the vertical axis is the torque T of the wind turbine, where w min is the minimum speed, w max is the rated speed, w 1 In order to avoid the low speed of the speed, w 2 In order to avoid the...

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Abstract

The invention provides a rotational speed control method and device for a wind power generating set. The speed control method includes: determining whether the current speed of the impeller of the wind turbine is in a speed range corresponding to the resonance zone; when the current speed of the impeller is in the speed range, performing resonance identification to determine whether there is a risk of resonance; When there is a risk of resonance, a rotational speed avoidance control that causes the current rotational speed of the impeller to jump to a predetermined rotational speed of the impeller is executed to avoid the risk of resonance. The rotational speed control method and device of the wind power generator set of the present invention can improve the reliability and power generation of the wind power generator set.

Description

technical field [0001] The following description relates to the field of wind power, and more particularly, to a method and device for controlling the rotational speed of a wind turbine. Background technique [0002] As the competition in the wind power market intensifies and the focus of wind power development gradually shifts to low wind speed areas, in order to increase the utilization time of wind turbines and increase the power generation of units in low wind speed areas, the tower height is continuously increased during the development process of wind turbines. The weight of the tower reduces the natural frequency of the tower. When the first-order natural frequency of the tower intersects with the frequency of a certain rotational speed of the impeller (for example, 1P frequency) during the operation of the wind turbine, there will be a resonance point during the operation of the wind turbine. or resonance bands. [0003] In addition, the demand for cost reduction an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00F03D17/00
CPCF03D7/00F03D17/00F05B2270/101F05B2260/96F05B2270/334Y02E10/72
Inventor 杨晓李永明
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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