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Wind direction measuring method for wind driven electricity generator capable of avoiding turbulence

A technology of wind generators and generators, applied in the field of wind direction measurement, can solve the problems of inaccurate wind alignment, etc., achieve the effect of improving wind accuracy and simplifying data processing

Inactive Publication Date: 2012-01-11
THREE GORGES NENGSHIDA ELECTRIC
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Problems solved by technology

[0005] In view of the fact that the current wind turbine yaw device cannot accurately face the wind, especially for large-scale grid-connected wind turbines, the present invention proposes a wind direction measurement method for wind generators that can avoid turbulent flow

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  • Wind direction measuring method for wind driven electricity generator capable of avoiding turbulence
  • Wind direction measuring method for wind driven electricity generator capable of avoiding turbulence
  • Wind direction measuring method for wind driven electricity generator capable of avoiding turbulence

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing, the present invention is further described: as figure 2 The wind generator shown in the method can avoid turbulent wind direction measurement, which is characterized in that: the generator uses two ultrasonic anemometers installed on both sides of the nacelle, and connects the output signal line of each ultrasonic anemometer to the controller The input interface, take the horizontal plane projection of the wind force and direction signals measured by two ultrasonic anemometers to determine the wind direction: take the horizontal plane projection value of a larger set of signals, and the controller determines the relative position of the current wind direction and the axial direction of the nacelle through the following formula:

[0015] θ = arctan(b / a),

[0016] Here θ is the wind direction offset angle, b is the wind force measured in the outward extension direction of the nacelle, and a is the wind force measured in the...

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Abstract

The invention relates to a wind direction measuring method for a wind driven electricity generator capable of avoiding turbulence, which is characterized in that a wind measuring instrument is ultrasonic wind measuring instrument; two ultrasonic wind measuring instruments used by the electricity generator are respectively arranged on the two sides of a machine cabin; and the output signal wire ofeach ultrasonic wind measuring instrument is connected with the input interface of a controller. The invention utilizes the characteristics that the ultrasonic wind measuring instruments can measure the three-dimensional wind direction so as to effectively eliminate the influence of the turbulence and enhance the yawing accuracy of the wind driven electricity generator. Because the influence of the turbulence is eliminated, the service life of the wind driven electricity generator and the wind aligning accuracy are enhanced, the data processing is simplified, and the solution method aiming atthe yawing wind aligning difficulty of large-scale wind driven electricity generators is supplied.

Description

technical field [0001] The invention relates to a wind power generator, in particular to a method for measuring wind direction by which the wind power generator can avoid turbulent flow. Background technique [0002] The yaw system ensures that the wind turbine cabin always faces the wind, and is a unique control system for wind turbines. The proposal of its design concept solves the characteristics that the wind is not suitable for capture because it is a random vector, and prolongs the service life of the fan while improving the efficiency of wind energy utilization. [0003] In the prior art, there are two modes of yaw, passive windward and active windward. Among them, the passive windward mode includes rudder yaw, leeward yaw and sidewind wheel yaw. Among them, the lower rudder yaw is widely used in small and medium-sized, small and micro wind turbines due to its simple structure and high reliability, but it is not suitable for large wind turbines; In the flow area, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P13/02
Inventor 戴曦
Owner THREE GORGES NENGSHIDA ELECTRIC
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