Wind speed correction method and device for wind farm

Abstract

The invention provides a wind speed correction method and device for a wind farm. The wind farm includes a plurality of wind turbines. The wind speed correction method includes: acquiring operation data of the multiple wind turbines; and identifying the multiple wind turbines according to the acquired operation data. A first wind turbine with normal wind speed detection and a second wind turbine with abnormal wind speed detection in the generator set; based on the difference in wind speed between the second wind turbine and the first wind turbine, determine the wind speed for the second wind turbine Correction coefficient: correcting the wind speed of the second wind turbine by using the determined wind speed correction coefficient. Using the wind speed correction method and device for wind farms in the exemplary embodiments of the present invention can effectively determine the consistency and deviation of wind speed measurements between wind turbines, and perform corresponding wind speed corrections.

Description

technical field [0001] The present invention generally relates to the technical field of wind power generation, and more particularly, to a wind speed correction method and device for a wind farm. Background technique [0002] At present, one or more nacelle anemometers are installed on the upper end of the nacelle of the wind turbine. Due to the influence of factors such as turbulence and wake at the rear end of the impeller, the actual wind speed measured by the nacelle anemometer is not the real inflow wind speed at the front end of the impeller. Therefore, it is necessary to correct the wind speed measured by the cabin anemometer to restore the true incoming wind speed. [0003] Due to the numerous and complicated influencing factors, it is difficult to find an accurate correction factor to correct and restore the actual wind speed measured by the cabin anemometer. For a wind farm with complex terrain including multiple wind turbines, the influencing factors of each sit...

AI Technical Summary

Problems solved by technology

However, at present, all wind turbines in the wind farm use a fixed correction factor to correct the wind measurement of the anemometer in the nacelle, which will cause a large deviation between the wind measurement of the anemometer in the nacelle and the real incoming wind speed. The wind measurement consistency of the anemometer in the nacelle of the unit is poor, which affects the consistency of the power curve of the whole wind turbine unit and the objective evaluation of the real power curve of the wind turbine unit

[0004] In addition, the current method of judging whether the wind speed measurement of a wind turbine is accurate is limited to a single wind turbine, and there is no horizontal consistency benchmarking among wind turbines in the whole field

And at present, only the measured wind speed of the nacelle anemometer is used to judge the deviation of the wind speed measurement on the surface, and the deviation between the wind measured by the nacelle anemometer and the real incoming wind speed is not combined with the real output of the wind turbine.

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