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Stall nonlinear flutter suppression type wind turbine blade and flutter suppression system

A wind turbine blade and non-linear technology, applied in the field of wind turbine control, can solve problems such as stall, flutter, fracture, failure, etc., and achieve the effects of fast drive response, light weight, and simple drive

Pending Publication Date: 2021-01-08
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wind turbine blades may fail due to stall flutter fracture under nonlinear stall aerodynamic forces

Method used

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  • Stall nonlinear flutter suppression type wind turbine blade and flutter suppression system
  • Stall nonlinear flutter suppression type wind turbine blade and flutter suppression system
  • Stall nonlinear flutter suppression type wind turbine blade and flutter suppression system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] combine Figure 1 to Figure 9 , a stall nonlinear flutter suppressed wind turbine blade, comprising a blade matrix 1, a blade notch 11 is opened in the lower part of the trailing edge side of the blade matrix 1, a swing mechanism is arranged in the blade notch 11, and the swing mechanism Including the trailing edge flap 2 and the swing control cylinder mechanism 3, the left and right ends of the trailing edge flap 2 are connected to the blade matrix 1 through the rotating shaft positioning mechanism 4, and the inner end of the trailing edge flap 2 is connected to the blade matrix through the swing control cylinder mechanism 3 1 connection.

[0050] The blade matrix 1 is in the shape of a triangular prism, the blade matrix 1 is a cavity skin structure, and the skin of the blade matrix 1 is made of high-strength composite material; the cross section of the blade matrix 1 is a circumferential antisymmetric surface, and the blade matrix 1 The head edge is in the shape of a...

Embodiment 2

[0058] combine Figure 1 to Figure 9 , a blade stall flutter suppression system, comprising a wind power frame and a wind power head connected to the wind power frame, the wind power head is adapted and connected with a plurality of above-mentioned stall nonlinear flutter suppression wind turbine blades The system controller is set in the wind machine head, and the system controller is set with a main control system, which controls the driving of the swing mechanism through the blade stall flutter control method.

[0059] The blade stall flutter control method includes the following steps:

[0060] Step A, wind turbine blades or wind turbine heads are equipped with wind speed sensors, and the wind speed sensors send wind speed signals to the analog input module in the main control system, and the main control system judges that the speed is greater than or equal to the critical stall flutter wind speed and lasts for a period of time Then call the aeroelastic system prefabrica...

Embodiment 3

[0074] The stall nonlinear flutter suppression type wind turbine blade and the flutter suppression system in the present invention improve the nonlinear aeroelastic stability of the blade to suppress possible stall flutter fracture failure phenomenon. The blade matrix structure of the wind turbine blade is a cavity skin structure, and the blade material matrix is ​​suitable for various composite materials, and a specific form of trailing edge flap structure is embedded and hinged on the composite material matrix of the blade. In the state of stall flutter (usually the critical wind speed of stall flutter continues to appear as a signal), the controller detects that the wind speed is greater than or equal to the critical wind speed and continues to occur, and starts the pneumatic transmission system 5 to drive two pairs (total four) of cylinders synchronously The reverse movement causes the flap to deflect and changes the distribution of aerodynamic force on the flap, thereby fu...

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Abstract

The invention discloses a stall nonlinear flutter suppression type wind turbine blade and a flutter suppression system. The blade comprises a blade parent body, wherein a blade notch is formed in thelower portion of the tail edge side of the blade parent body, a swing mechanism is arranged in the blade notch, the swing mechanism comprises a tail edge flap and a swing control air cylinder mechanism, the left end and the right end of the tail edge flap are connected with the blade parent body through a rotating shaft positioning mechanism, and the inner end of the tail edge flap is connected with the blade parent body through the swing control air cylinder mechanism. The blade stall flutter suppression system comprises a wind turbine frame and a wind turbine head connected to the wind turbine frame, and the stall nonlinear flutter suppression type wind turbine blade is connected to the wind turbine head in a matched mode; and a system controller is arranged in the wind turbine head, a main control system is arranged in the system controller, and the main control system controls driving of the swing mechanism through a blade stall flutter control method. By arranging the novel bladeand the suppression system, the stability of the blade during stall can be better kept, and the blade is prevented from being broken.

Description

technical field [0001] The invention relates to the field of wind power generator control, in particular to a stall nonlinear flutter suppression wind turbine blade and a flutter suppression system. Background technique [0002] In recent years, new energy technologies for wind power generation have been greatly developed, especially wind energy capture machinery. Under the action of nonlinear stall aerodynamic force, wind turbine blades may fail due to stall flutter fracture. The specific trailing edge flap structure described in this design and the air pressure transmission drive, based on the intelligent control algorithm to drive the trailing edge flap swing scheme, based on the combined effect of unstable displacement amplitude control and stall flutter wind speed, can just carry out aeroelastic instability. sexual regulation and control. Contents of the invention [0003] The purpose of the present invention is to provide a stall nonlinear flutter suppression wind ...

Claims

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Application Information

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IPC IPC(8): F03D1/06F03D7/02F03D7/04
CPCF03D1/0675F03D7/0236F03D7/043F03D7/046F05B2260/96F05B2270/605F05B2270/32F05B2270/404Y02E10/72
Inventor 刘廷瑞孙长乐
Owner SHANDONG UNIV OF SCI & TECH
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