Yaw control method and device for wind generating set

Abstract

The invention discloses a yaw control method and device for a wind generating set. The method includes the steps that a wind regime recognition method is adopted for judging whether the current wind direction type is a trend type wind direction type or a fluctuation type wind direction type; if the wind direction is a fluctuation type wind direction, under-yaw control is adopted when yaw is stopped; if the wind direction is a trend type wind direction, whether wind in the trend type wind direction is turn-around wind or not is judged; if yes, under-yaw control is adopted when yaw is stopped; if not, over-yaw control is adopted when yaw is stopped. According to the method, the wind direction is divided into the fluctuation type wind direction and the trend type wind direction, whether wind in the trend type wind direction is turn-around wind or not is judged, different yaw stop control modes are adopted in the wind directions of different types, accuracy of yaw towards wind is improved, the number of times of yaw of the wind generating set is reduced, the fault occurrence probability of the wind generating set is reduced, and the generating capacity of the wind generating set is improved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method and device for controlling the yaw of a wind power generating set. Background technique [0002] At present, the yaw control of large-scale wind turbines usually controls the yaw of the unit according to the wind direction signal sent back by the wind direction sensor. When the wind direction changes and exceeds the allowable error range, the automatic yaw command issued by the controller will cause the yaw system to execute the error. The corrected action, when the angle between the wind direction and the normal line of the impeller reaches a certain error range, the yaw action stops. [0003] This traditional yaw control method does not adjust the yaw according to the law of wind direction changes. Under certain wind conditions, continuous yaw will occur. In this case, the time interval of yaw is short and the number of yaws is large. Therefore, after th...

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Problems solved by technology

[0003] This traditional yaw control method does not adjust the yaw according to the changing law of the wind direction. Under certain wind conditions, continuous yaw will occur. In this case, the yaw time interval is short and the number of yaws is large. Therefore, after the unit has been in operation for many years, electrical and mechanical failures will occur in the yaw system, which will affect the stable and safe operation of the unit, and at the same time, affect the life of the unit to a certain extent

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