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Angle installation error obtaining method of anemorumbograph

An anemometer and installation error technology, applied in the direction of speed/acceleration/shock measurement, testing/calibration of speed/acceleration/shock measurement equipment, instruments, etc., can solve the angle installation error of anemometer, no measurement method, etc problems, to achieve the effect of improving measurement accuracy, saving labor costs and capital costs

Inactive Publication Date: 2016-05-04
DALIAN SHINERGY SCI & TECH DEV
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Problems solved by technology

[0014] At present, there is no more convenient measurement method except for using manual and high-precision angle measurement and positioning system to measure the angle installation error of the anemometer
How to determine the angle installation error of the wind direction anemometer conveniently, quickly and at low cost, there is no report on the relevant method so far

Method used

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  • Angle installation error obtaining method of anemorumbograph
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  • Angle installation error obtaining method of anemorumbograph

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Embodiment Construction

[0041] Below in conjunction with accompanying drawing, the present invention will be further described: according to method step of the present invention, the angle measurement error function δ=f(v)≈a that anemometer obtains 0 +a 1 ·v+a 2 · v 2 +…+a n · v n , which shows that the angle measurement error function δ of the anemometer is a multi-degree polynomial function of the wind speed. Angle installation error refers to the inconsistency between the zero position of the anemometer and the direction of the fan head, which will cause a fixed error between the actual measured wind direction deviation angle of the anemometer and the actual wind direction deviation angle, such as Figure 4 shown. This error is a fixed error and will not be affected by errors such as wind speed, wake flow, and microscopic site selection. The constant ɑ 0 express.

[0042] When the wind turbine is in the normal power generation state, and the wind speed and the position of the nacelle remain...

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Abstract

The invention discloses an angle installation error obtaining method of an anemorumbograph. The method comprises the following steps that data collected by the anemorumbograph is preprocessed according to wind speed segments; an angle measuring error function delta=f(v) approximately equals a0+a1.v+a2.v2...+an.vn is formed; and the constant a0 is used as the angle installation error of the anemorumbograph. According to the invention, data collected by the anemorumbograph in the learning period is calculated, and fit into a polynomial function in the least square fitting method, the angle installation error of the anemorumbograph is obtained via the polynomial function, and thus, the problem that the angle installation error of the anemorumbograph is inconvenient to measure is solved. After that the angle installation error of the anemorumbograph is obtained, measurement error can be compensated to correct the practical wind deviation angle theta 1 in the blades of a blower fan, the measuring precision for the wind deviation angle of the blower fan is improved, and the labor and fund cost for reinstalling the anemorumbograph is reduced.

Description

[0001] The invention relates to an anemometer, in particular to a method for acquiring the angle installation error of the anemometer. Background technique [0002] Wind turbines convert the kinetic energy of wind into electricity, with the goal of generating as much electricity as possible while keeping the mechanical load on the wind turbine low. To successfully achieve the above goals, the key is to have the fan impeller accurately aligned with the wind direction. [0003] Such as Figure 1-2 As shown, according to the theory of wind turbine dynamics, when the wind speed is constant and the generator speed is lower than the rated speed, the power generated by the wind turbine is proportional to the cube of the cosine of the wind direction deviation angle θ. Assuming that the wind direction has no deviation, the power obtained by the fan impeller is Power1; when the wind speed is constant and the wind direction deviation angle is θ, the power obtained by the fan impeller is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/00
CPCG01P21/00
Inventor 马丁·费舍尔孟繁擘矫斌
Owner DALIAN SHINERGY SCI & TECH DEV
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