Vertical-shaft wind turbine rotary spindle vibration restraining method which is high in wind energy capturing efficiency

A technology of rotating the main shaft and the vertical axis, which is used in the control of wind turbines, wind turbines, motors, etc., can solve the problems of reducing the wind energy capture efficiency of wind turbines, and the wind turbine cannot reach the maximum wind energy capture speed, and achieve reverse electric braking. The effect of smooth and easy control of torque, fast adjustment speed and high work efficiency

Inactive Publication Date: 2015-02-25
NANTONG UNIVERSITY
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Problems solved by technology

[0008] However, the existing method of "suppressing the free vibration of the tower by reducing the speed of the wind turbine" is too conservative. Maximum wind capture speed

Method used

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  • Vertical-shaft wind turbine rotary spindle vibration restraining method which is high in wind energy capturing efficiency
  • Vertical-shaft wind turbine rotary spindle vibration restraining method which is high in wind energy capturing efficiency
  • Vertical-shaft wind turbine rotary spindle vibration restraining method which is high in wind energy capturing efficiency

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Experimental program
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Embodiment Construction

[0053] refer to figure 1 , which is a flow chart of an embodiment of the electromechanical coordination suppression method for the vibration of the rotating main shaft of the vertical axis wind turbine according to the present invention. This embodiment includes the following steps:

[0054] S100, start.

[0055] S110. Acquire the vertical inclination of the rotating spindle in real time.

[0056] The vertical inclination angle includes the inclination declination value α in two orthogonal directions in the horizontal section of the main axis x and α y . The inclination angle value can be obtained by installing a two-axis inclination sensor on the stationary part at the top of the rotating spindle.

[0057] S120. Calculate the vibration intensity K of the rotating spindle v .

[0058] The tremor intensity is defined as, K v = α x 2 ...

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Abstract

The invention discloses a vertical-shaft wind turbine rotary spindle vibration restraining method which is high in wind energy capturing efficiency. The method includes: acquiring vertical inclination angle of a rotary spindle in real time; calculating vibration intensity of two orthogonal directions in a horizontal section of the rotary spindle and optimal rotation speed of a wind turbine generator under a maximum tracking target; determining expected rotation speed; allowing a rotating speed inner ring controller to drive the rotation speed to reach the expected rotation speed fast; and starting a reverse electric braking function of the rotating speed inner ring controller and a electromagnetic braking mechanism of the rotary spindle when vibration intensity of the spindle exceeds a preset safety regulating threshold; wherein fast rotating speed regulating of the rotating speed inner ring controller is achieved by motor acceleration through directly cutting of part of phase winding excitations or motor deceleration through releasing current chopping limits. By the method, current vibration intensity of the spindle can be calculated in real time, spindle vibration can be restrained, and the wind turbine generator is enabled to acquire the highest wind energy capturing efficiency as far as possible while mechanical stability is maintained.

Description

[0001] This application is a divisional application with application number: 201210049193.0, application date: 2012.2.29, titled "Method and Device for Electromechanical Coordination Suppression of Vibration of Rotating Main Spindle of Vertical Axis Wind Turbine". technical field [0002] The invention relates to the field of mechatronics control of wind turbines, in particular to a method and a device for intelligently suppressing mechanical and electrical coordination of vibration of a rotating main shaft of a vertical-axis wind turbine. Background technique [0003] Except for the establishment of experimental wind farms in a few regions of the world, there is still no large-scale promotion of vertical axis wind turbines, but its superior aerodynamic performance has attracted more and more attention of researchers from all over the world. [0004] Structurally, the vertical rotating main shaft structure of the vertical axis wind turbine belongs to the mast structure in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/06
CPCY02E10/74
Inventor 茅靖峰吴国庆吴爱华张旭东曹阳周井玲肖龙雪
Owner NANTONG UNIVERSITY
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