Automatic yaw correction control method for wind turbine generator

Abstract

The invention discloses an automatic yaw correction control method for a wind turbine generator, which comprises the following steps of: when the wind turbine generator gives an alarm of large wind direction deviation, adding a certain angle deviation value to a measured value of one wind indicator to obtain a correction value, and inputting the correction value as a yaw error to carry out automatic wind alignment; adjusting the angle deviation value in the yaw error input to enable the deviation percentage of the actually measured power of the wind turbine generator after wind alignment and the corresponding power obtained by looking up the table through the real-time wind speed section to meet the preset condition, obtaining a correction value, and replacing the average value of the two wind indicators with the correction value to serve as the yaw error input of automatic wind alignment; according to the method, the adjusted yaw error input serves as the correction value, the correction value replaces the average value of the two wind indicators to serve as the yaw error input of automatic wind alignment of the wind turbine generator set, finally accurate wind alignment of the wind turbine generator set is achieved, the generating capacity of the wind turbine generator set before alarm repair with large wind direction deviation is improved, damage to the wind turbine generator set is reduced, and the reliability of the wind turbine generator set is improved. And meanwhile, the manual operation and maintenance cost is reduced.

Description

technical field [0001] The invention relates to the technical field of yaw control of wind turbines, in particular to a method for automatic correction and control of yaw of wind turbines. Background technique [0002] Modern megawatt wind turbines are equipped with a yaw system, which can rotate the nacelle according to the wind direction so that the wind turbine can quickly and efficiently complete the operation against the wind, so that the impeller is kept in the windward state as much as possible. The current technology is that the yaw control system of the crew collects the wind direction data of the two wind vanes on the top mast of the engine room in real time, and inputs the average value of the two wind vanes as the yaw error. Combined with the wind speed, the motor is driven to adjust the position of the engine room, reducing the difference between the axis of the engine room and the The deviation of the wind direction makes the average angle between the nacelle a...

AI Technical Summary

Problems solved by technology

Before it is repaired, there will be a large deviation between the wind rotor of the unit and the actual wind direction. At this time, it will not only reduce the efficiency of the unit to capture wind energy, but also cause aeroelastic fluctuations of the blades, increase the asymmetric load of the unit, and then reduce the wind power of the unit. operating life of

Especially for offshore wind turbines, if they cannot go to sea for a long time due to sea conditions or other reasons, the loss of power generation and damage to the unit itself will be immeasurable

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