Control system in wind turbine blades

A technology for wind turbine blades and wind turbines, which is applied in the control of wind turbines, the drive of control systems, and engine control. It can solve the problems of undesired use of cables and poor mechanical stability, and achieve compact and strong structures. Strong, cheap weight effect

Inactive Publication Date: 2011-08-24
VESTAS WIND SYST AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unavoidable phenomenon of lightning, it is not desirable to use cables
Also, the speed

Method used

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  • Control system in wind turbine blades
  • Control system in wind turbine blades
  • Control system in wind turbine blades

Examples

Experimental program
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Embodiment Construction

[0050] FIG. 1 shows a prior art wind turbine blade 100 and shows some examples of so-called aerodynamic devices 101 . During wind turbine operation, when the aerodynamic device associated with the blade body 107 is operated, it changes the aerodynamic surface or shape 105 of the wind turbine 100 thereby changing the lift and / or drag coefficient of the wind turbine. In the example shown in the figure, either by changing the position of a movable trailing edge flap 102 disposed at an outer distance along the length of the blade, or by actuating a plurality of movable vortex generators 103 (in this example, vortex The generator is arranged on the suction side of the wind turbine blade close to the root 104 ) and can change and adjust the aerodynamic shape 105 of the wind turbine blade 100 . Examples of such aerodynamic devices 101 are, as described above in the background, different movable or adjustable flaps, such as trailing edge flaps 102, leading edge ailerons or Krueger fla...

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PUM

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Abstract

The invention relates to a wind turbine blade with devices for modifying the aerodynamic surface or shape of the blade. The position and movement of these devices are controlled by a pneumatic actuator powered by pressure from a pressure chamber connected to the actuator via a valve system controlling the powering. The valve system in return is operated by a control unit conveying control signalsto the valve system via a signal communication pathway. The communication pathway may comprise a power link or pressure tubes with a liquid or a gas. In one embodiment the gas used is of a lower molecular weight than 28.9 kg/kmol and thereby lower than air, whereby the speed of the pressure signals being sent from the control unit is increased and thereby the operational speed of the aerodynamic devices. The invention further relates to a wind turbine comprising a tower, a nacelle mounted to one end of the tower, and a rotor with at least one wind turbine blade according to the above.

Description

technical field [0001] The present invention relates to a wind turbine blade having means for changing the aerodynamic surface or shape of the blade actuated by a pneumatic actuator. Background technique [0002] Most modern wind turbine blades are continuously controlled and adjusted during operation to ensure optimum performance of the wind turbine under all operating conditions - for example under varying wind speeds or varying requirements of the plant. It is also desirable to regulate wind turbines to account for localized rapid changes in wind speed - so-called gusts. Furthermore, the load on each blade is different due to e.g. the operation of the tower or the actual wind speed as a function of the distance from the ground (wind profile), so being able to adjust each wind turbine blade individually is essential to ensure load balance and thus reduce rotor roll And tilting is beneficial. [0003] A known and effective method of adjusting the load on the rotor is pitc...

Claims

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Application Information

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IPC IPC(8): F03D1/06
CPCY02E10/721F03D7/0232Y02E10/723F05B2240/31Y02E10/72F03D1/0683F05B2270/506F03D1/0675F05B2270/60F05B2240/3052
Inventor M·汉考克N·D·巴洛D·韦尔德坎普
Owner VESTAS WIND SYST AS
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