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Wind speed detection method and device for wind turbine

A technology for wind turbines and detection methods, which is applied in the directions of measuring devices, fluid velocity measurement, velocity/acceleration/impact measurement, etc., which can solve the problems that the maximum power tracking control cannot be realized, and the anemometer cannot obtain the wind speed, etc., so as to facilitate accurate control , to avoid measurement errors, the effect of accurate wind speed

Active Publication Date: 2017-09-29
INNER MONGOLIA UNIV OF TECH
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Problems solved by technology

However, due to the blocking effect of the wind wheel and the disturbance of the airflow, the anemometer cannot obtain accurate wind speed, and thus cannot achieve accurate maximum power tracking control

Method used

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  • Wind speed detection method and device for wind turbine
  • Wind speed detection method and device for wind turbine
  • Wind speed detection method and device for wind turbine

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Embodiment Construction

[0037] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0038] figure 2 A flow chart of a wind speed detection method for a wind power generating set according to an embodiment of the present invention is shown. Such as figure 2As shown, the detection method may include: step S1, detecting the angular velocity of the wind rotor, the output power of the generator and the pitch angle. where the detected rotor angular velocity can be denoted as ω, the detected generator output power can be denoted as P, and the detected pitch angle can be denoted as θ m . If the wind power generating set is a DC driven wind power generating set, then the detected angular velocity ω of the wind rotor is equal to the rotational spee...

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Abstract

The invention discloses a wind speed detection method used for a wind power generator set and a device thereof. The detection method comprises the steps that wind wheel angular speed, power generator output power and the pitch angle are detected; blade tip speed ratio is set; wind energy utilization coefficient is confirmed according to the set blade tip speed ratio and the detected pitch angle; a power error is confirmed according to the set blade tip speed ratio, the detected power generator output power, the detected wind wheel angular speed and the confirmed wind energy utilization coefficient, wind wheel rotational inertia, air density, wind wheel diameter and wind swept area; if the power error exceeds the allowed power error range, the blade tip speed ratio is reset and the wind energy utilization coefficient and the power error are confirmed again until the power error is within the power error range; and if the power error is within the power error range, wind speed of the wind power generator set is confirmed according to the set blade tip speed ratio and the detected wind wheel angular speed and wind wheel diameter. Therefore, wind speed can be accurately obtained and accurate data support is provided for realization of accurate control of the wind power generator set.

Description

technical field [0001] The invention relates to the field of wind power generator control, in particular to a wind speed detection method and device for a wind power generator set. Background technique [0002] Because wind power generation has the advantages of environmental protection and energy saving, it has been widely used at present, and the control technology of wind power generators has also attracted more and more attention. During the operation of the wind turbine, the control of the wind turbine is mainly divided into two stages: when the output power of the generator is less than or equal to the rated power, the pitch angle remains unchanged at 0°, and there is no need to adjust the propeller at this time. pitch angle, only the maximum power tracking control is required to make the maximum possible energy absorption of the wind rotor. When the output power of the generator is greater than the rated power, the size of the pitch angle should be adjusted according...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P5/00
Inventor 孟克其劳张占强贾大江吴洁马建光陈虎包道日娜
Owner INNER MONGOLIA UNIV OF TECH
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