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Second-order shaking protection method, device and system for tower of wind generating set

A technology for wind turbines and protection devices, which is applied in the directions of wind turbines, the configuration of installing/supporting wind turbines, and the control of wind turbines, can solve problems such as the influence of safe and stable operation of the wind turbines, and achieves improved judgment reliability, easy application, Universal effect

Pending Publication Date: 2022-05-27
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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Problems solved by technology

However, if the second-order frequency of the tower is excited during the operation of the wind turbine, it will have a great impact on the safe and stable operation of the unit. However, there is no relevant technology that discloses the acceleration component of the second-order characteristic frequency of the wind turbine tower during the operation of the wind turbine. The extraction of the tower and the protection measures for the unit when the tower shakes due to the second-order characteristic frequency of the tower

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  • Second-order shaking protection method, device and system for tower of wind generating set
  • Second-order shaking protection method, device and system for tower of wind generating set
  • Second-order shaking protection method, device and system for tower of wind generating set

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Embodiment Construction

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] like figure 1 and image 3 As shown, the method for protecting the second-order swaying of a wind turbine tower according to an embodiment of the present invention includes the steps:

[0029] Obtain the tower acceleration at the front and rear positions of the wind turbine nacelle and process it to obtain the acceleration component at the second-order eigenfrequency of the tower;

[0030] Compare the acceleration component at the second-order eigenfrequency of the tower with the first threshold and the second threshold respectively. If the acceleration component at the second-order eigenfrequency of the tower is greater than the first threshold and less than the second threshold, the tower two is triggered. If the acceleration component at the second-order characteristic frequency of the tower is greater than the second threshold, it wi...

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Abstract

The invention discloses a second-order shaking protection method, device and system for a tower of a wind generating set, and the method comprises the steps: obtaining and processing the acceleration of the tower at the front and rear positions of a cabin of the wind generating set, and obtaining the acceleration component of the tower at the second-order characteristic frequency; the acceleration component of the tower under the second-order characteristic frequency is compared with a first threshold value and a second threshold value, if the acceleration component of the tower under the second-order characteristic frequency is larger than the first threshold value and smaller than the second threshold value, tower second-order shake protection is triggered, a primary tower second-order shake protection mode is started, and the wind generating set runs at a reduced speed; and if the acceleration component under the second-order characteristic frequency of the tower is greater than a second threshold value, entering a secondary tower second-order shaking protection mode, and performing shutdown protection on the wind generating set. The method has the advantages of guaranteeing safe operation of the unit and reducing power generation loss.

Description

technical field [0001] The invention mainly relates to the technical field of wind power generation, and in particular relates to a method, device and system for second-order sloshing protection of a tower of a wind turbine. Background technique [0002] With the increase of the installed capacity of wind turbines, in order to improve the wind energy capture efficiency of wind turbines in plain areas, the height of the towers of wind turbines is gradually increased. Especially in recent years, with the emergence of some ultra-high tower models, during the operation of the wind turbine, the second-order mode of the tower is easily excited, which causes the tower to shake at the second-order characteristic frequency of the tower, which has a negative impact on the normal operation of the unit. a great risk. Existing wind turbines generally use a vibration monitor to monitor and identify the vibration acceleration of the wind turbine and make control and protection actions, or...

Claims

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Application Information

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IPC IPC(8): F03D7/02F03D13/20F03D17/00
CPCF03D7/0268F03D13/20F03D17/00Y02E10/72
Inventor 周健蒋韬刘红文陆仕信
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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