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Wind direction identification method and system based on tower footing load of wind generating set

A technology for wind turbines and identification methods, applied in the direction of instruments, speed/acceleration/shock measurement, and measuring devices, which can solve the problems of poor reliability, high damage rate of wind direction measuring instruments, and obstruction of blade roots in the measured wind direction and other problems, to achieve good wind direction environmental adaptability, good wind direction anti-interference, and overcome the effects of freezing and freezing

Pending Publication Date: 2022-06-28
GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the wind direction measuring instruments of wind turbines are generally installed at the tail of the nacelle, and the measured wind direction is easily blocked and interfered by blade roots
In addition, under typhoon wind conditions, the damage rate of the wind direction measuring instrument is very high, and its reliability cannot meet the requirements well

Method used

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  • Wind direction identification method and system based on tower footing load of wind generating set
  • Wind direction identification method and system based on tower footing load of wind generating set
  • Wind direction identification method and system based on tower footing load of wind generating set

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Experimental program
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Effect test

Embodiment 1

[0085] The present embodiment discloses a wind direction identification method based on the tower base load of a wind turbine, comprising the following steps:

[0086] 1) Strain sensors are mounted on the tower base of the wind turbine to measure the stress distribution of the tower base. The details are as follows:

[0087] Four strain sensors are arranged on the inner surface of the tower base at a certain height. The strain sensors are arranged on the same pitch circle of the tower, with an interval of 90 degrees from each other, and each strain sensor corresponds to azimuth angles of 0, 90, 180 and 270 degrees respectively. An additional temperature sensor should be installed adjacent to each strain sensor, and the temperature measured by it is used to correct the strain measurement of the strain sensor. The strain sensor can be an optical fiber type strain sensor or a resistance type strain sensor, but is not limited to these two types of strain sensors. For the layout ...

Embodiment 2

[0119] This embodiment discloses a wind direction identification system based on the tower base load of a wind turbine, such as image 3 shown, including the following functional modules:

[0120] The tower base stress distribution acquisition module is used to install strain sensors on the tower base of the wind turbine to measure the tower base stress distribution, and perform paranoid correction and temperature correction on the strain measurement of each strain sensor to obtain the final response. strength;

[0121] The tower base pitching moment and lateral bending moment calculation module, based on the tower base stress distribution measured by the strain sensor, calculates the tower base pitching moment and lateral bending moment;

[0122] The main vector bending moment amplitude and direction angle calculation module of the tower base, based on the pitch bending moment and lateral bending moment of the tower base, calculate the main vector bending moment amplitude an...

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Abstract

The invention discloses a wind direction identification method and system based on tower footing load of a wind generating set, and the method comprises the steps: pasting a strain sensor on a tower footing of a tower of the wind generating set, and measuring the stress distribution condition of the tower footing; calculating the pitching bending moment and the lateral bending moment of the tower footing based on the tower footing stress distribution measured by the strain sensor; calculating a main vector bending moment amplitude and a main vector bending moment direction angle of the tower footing based on the pitching bending moment and the lateral bending moment of the tower footing; calculating a cabin yaw error angle based on the main vector bending moment amplitude and the main vector bending moment direction angle of the tower footing; and calculating a wind direction angle based on the cabin yaw error angle. Stress distribution data are measured through the tower footing strain sensor, the current wind direction of the wind generating set is recognized and calculated, the reliable wind direction is provided for accurate yaw wind alignment of the wind generating set under the limit wind condition, and the limit load of the set is reduced to the maximum extent.

Description

Technical field [0001] The present invention relates to the technical field of wind power generation, and in particular, to a wind direction identification method and system based on the tower base load of a wind turbine generator set. Background technique [0002] Wind turbines are equipment that convert wind energy into electrical energy. As a sustainable and renewable green energy, wind turbines continue to develop into large-scale. As an important measurement data, wind direction plays a very important role in the normal operation and safety of wind turbines. Under extreme wind speeds (such as typhoon wind conditions), the wind turbine unit faces the wind direction to minimize the unit's ultimate load. Therefore, above the cut-out wind speed, the unit should always face the wind. At present, wind direction measuring instruments of wind turbines are generally installed at the rear of the nacelle, and the measured wind direction is easily blocked and interfered by blade ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P13/02
CPCG01P13/02Y02E10/72
Inventor 李刚马冲段博志
Owner GUANGDONG MINGYANG WIND POWER IND GRP CO LTD