A Yaw Calibration Method Based on Wind Sensor

Abstract

The invention provides a fan sensor-based drift correcting method. The fan sensor-based drift correcting method comprises, firstly, collecting generator operation data within the time period of T1 through a fan sensor, and eliminating abnormal data; secondly, based on a generator simulation model, creating a multi-variable power matrix to structure a numerical reference system; thirdly, taking wind deviation within T1 as fixed wind deviation to acquire an relation of incoming flow direction and detected wind direction to determine that measured power is in linear correlation with difference power acquired through the multi-variable power matrix; fourthly, through the optimal linear correlation method or the least residual method, solving out an optimal solution; lastly, inputting the acquired optimal solution into a fan control to perform drift compensation and accordingly to achieve generation drift correction. On the basis of not adding devices, the fan sensor-based drift correctingmethod solves the problem of deviations existing in fan wind direction measurement, achieves zero-cost drift correction and is high in reliability and free from maintenance. The fan sensor-based driftcorrecting method can be applied in scales to existing generators to effectively improve the accuracy of drifted wind alignment of wind generators and further to improve the generating capacity of the wind generators.

Description

technical field [0001] The invention relates to the technical field of yaw calibration, in particular to a yaw calibration method based on a fan sensor. Background technique [0002] A wind turbine is a device that converts wind energy into electrical energy. It obtains energy from the wind through the wind rotor and transmits it to the generator for power generation by the transmission chain. Usually, a large wind turbine is controlled by the generator to control the torque of the wind rotor and the pitch system. The blade pitch angle is used to maintain the stable operation of the wind turbine under various wind conditions. [0003] The accuracy of the wind will directly affect the power generation of the wind turbine. Under the premise of the same execution accuracy of the yaw, if the wind direction measurement is offset, the wind turbine will continue to track to the wrong wind direction, which will directly lead to the reduction of power generation. Accurate wind direct...

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Problems solved by technology

[0006] Aiming at the defects in the prior art, the present invention provides a yaw calibration method based on wind turbine sensors, which solves the problem of deviation in wind direction measurement of wind turbines without adding additional equipment, realizes zero-cost yaw calibration, and is reliable high, maintenance-free

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