Method for correcting wind alignment deviation of wind turbine

Abstract

The invention discloses a method for correcting the wind alignment deviation of a wind turbine. The wind turbine is a horizontal-axis wind turbine. The method includes the following steps that firstly, a laser radar wind meter is installed and used for measuring the real-time wind direction in front of a wind wheel of the operating wind turbine, and the direction of the central axis of the laser radar wind meter and the direction of the central axis of a cabin of the wind turbine need to be kept the same in the installing process; secondly, according to a plurality of measured real-time wind directions, the actual wind alignment deviation value alpha of the wind turbine is acquired through statistical analysis; thirdly, the installed location of the initial zero position of a wind indicator on the cabin of the wind turbine is adjusted, and then the included angle between the initial zero position of the wind indicator and the horizontal axis of the cabin of the wind turbine changes from zero to alpha, accurate wind alignment of the wind turbine is achieved, and the measured value of the wind indicator of the adjusted wind turbine can serve as input of a wind turbine yaw system. According to the method for correcting the wind alignment deviation of the wind turbine, accurate wind alignment of the wind turbine is achieved, the method can be used for improving the power generation performance of the operating wind turbine, additional loads are reduced, production cost of the wind turbine is not increased, and the method is suitable for being popularized and applied.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a method for calibrating wind deviation of a fan, and the method is suitable for horizontal-axis wind power generators. Background technique [0002] At present, the yaw system is widely used in large-scale wind turbines (wind turbines). Accurate wind-facing can make the wind rotors of the wind turbines capture more wind energy, thereby obtaining objective benefits in terms of power generation. Such as figure 1 As shown, the traditional horizontal axis wind turbine is composed of wind rotor 1, nacelle 2, tower 3 and other parts. Wind rotor 1 is connected with nacelle 2 through the main shaft, and nacelle 2 is installed on the top of The navigation system 4 rotates around the axis of the tower 3 so that the surface of the wind rotor faces the wind more accurately, and this process is called yaw. When the wind rotor is facing the wind, the fan can obtain the maximum electric e...

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Problems solved by technology

[0006] Chinese patent applications CN102797629A (a control method, controller and control system for wind turbines) and CN103061980A (feedforward control system and control method for wind turbines based on laser wind measuring radar) are aimed at the measured values ​​of traditional anemometers In order to solve the problem of poor accuracy, a method of using the laser radar anemometer to obtain the wind condition signal and send it to the main control system for the pitch control of the wind turbine is provided. The maximum wind energy capture of the wind turbine is realized through the pitch control, which improves the Phenomenon of poor measurement accuracy

[0007] The above method only realizes the capture of the maximum wind energy of the wind turbine through pitch control, but the wind deviation of the wind turbine still exists, which cannot eliminate the mechanical damage to the structure of the wind turbine caused by the long-term inaccuracy of the wind, which will also affect the power generation of the wind turbine At the same time, installing a laser radar wind measurement system for a single fan for long-term unit control will significantly increase the cost of the whole machine

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