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A method and system for controlling vibration of a tower of a wind turbine

A technology for wind turbines and towers, which is applied in the control of wind turbines, monitoring of wind turbines, and wind power generation, etc., can solve the problems of poor tower vibration control effect and inaccurate measurement accuracy.

Active Publication Date: 2020-12-11
北方国际合作股份有限公司
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Problems solved by technology

[0006] The present invention overcomes the existing problems of inaccurate measurement accuracy and poor vibration control effect of the tower caused by only measuring the vibration acceleration in a single direction of the tower top cabin

Method used

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  • A method and system for controlling vibration of a tower of a wind turbine
  • A method and system for controlling vibration of a tower of a wind turbine
  • A method and system for controlling vibration of a tower of a wind turbine

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0051] A method for controlling the vibration of a wind turbine tower, wherein the unit of vibration acceleration is m / s 2 , the unit of velocity is m / s, which can be used to measure the vibration amplitude and other information of the position of the nacelle on the top of the tower. When the wind turbine is in a static state, its vibration acceleration and vibration velocity are approximately 0.

[0052] Vibration control method of the present invention specifically comprises the steps:

[0053] 1) Use several acceleration sensors installed at the connection position between the top of the tower and the nacelle to simultaneously measure the vibration acceleration in the axial direction and radial direction of the nacelle on the top of the wind turbine tower. In the circumferential direction of the outer peripheral surface of the tower; then clear the ...

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Abstract

The invention relates to a method and system for controlling the vibration of a wind turbine tower. The technical problem to be solved by the present invention is that the existing measurement of vibration acceleration in a single direction of the tower top cabin will lead to inaccurate measurement accuracy, and the vibration control effect of the tower is not good. The present invention carries out vector summation of the acceleration or velocity in any direction in the horizontal plane of the tower top, or measures and calculates the vibration acceleration in the radial direction of the spherical surface with the intersection point of the horizontal plane of the tower top and the central axis of the tower as the center of the sphere, and utilizes a band-pass filter Perform first-order and second-order filtering on the combined acceleration or combined velocity to obtain the pitch control vibration input value based on the vibration acceleration at the top of the fan tower to control the blade pitch rate, and then combine it with the pitch control vibration input based on the fan generator speed value, and finally use the vibration input values ​​of the above two aspects to control the pitch rate of the fan, so as to achieve the effect of accurately measuring and reducing the first-order and / or second-order natural frequency amplitude of the tower top nacelle in the direction of its resultant force .

Description

technical field [0001] The present invention relates to a method and system for controlling the vibration of a wind turbine tower, in particular to a method and system for controlling the vibration of a horizontal axis wind turbine tower. Background technique [0002] Wind power generation is a green, clean and environmentally friendly energy utilization method. By installing wind power generation devices in areas with strong natural winds on the sea and on land, the natural energy in the area can be fully utilized and converted into electrical energy, thereby creating huge economic benefit. [0003] However, as the diameter of the rotor of the current wind turbine is getting larger and the height of the tower is getting higher and higher, the probability of unit resonance is also increasing. The main reasons for resonance are turbulence, tower shadow, wind Changes in shear and wind turbine loads cause the tower and nacelle of the wind turbine to vibrate. On the other hand,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00F03D17/00F03D13/20
CPCF03D7/0224F03D7/0296F03D7/043F03D17/00G06F17/11Y02E10/72
Inventor 柳盼
Owner 北方国际合作股份有限公司
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