Control method and system for pitch angle of wind turbine generator set, equipment and storage medium

Abstract

The invention discloses a control method and system for the pitch angle of a wind turbine generator set, equipment and a storage medium, and belongs to the field of wind power generation. Whether extreme wind direction changes occur or not is judged by detecting the wind direction measured by a wind indicator and comparing the wind direction with a preset threshold value, and the minimum pitch angle is dispatched to cope with the limit load caused by rapid wind direction changes. The positive and negative wind directions measured by the wind indicator are judged, and the load borne by a large part of the set is larger than that borne in a positive wind direction when the minimum pitch angle is increased during flow incoming in the negative wind direction, so that the limit load is reduced by only performing control of increasing the minimum pitch angle on the wind direction of the positive incoming flow. Compared with a control mode without distinguishing the wind directions, the limit load caused by the extreme wind direction changes of the set is further reduced. By means of a mode of judging the wind speed threshold value, the condition that the current measured wind speed exceeds the threshold value serves as the primary condition, and the problem of loss of the generating capacity of the set due to increase of the pitch angle under the condition that the wind speed is low but the bending moment of the set is not impacted is solved.

Description

Technical field[0001]The present invention belongs to the field of wind power, involving a control method, system, device, and storage medium of a wind turbine pitch angle.Background technique[0002]In the design of the international electrician standard IEC61400-13 wind turbine, the wind turbines experience the wind turbine, the wind speed and the wind and the wind direction of the superposition of ECD (direction change) are stressful, in this case The key components of the unit's yaw bearing and other key components are subject to larger bending moments, and it is possible to experience limit loads. Therefore, it is necessary to make the unit operation control strategy adjustment, so that the unit is changed as much as possible to reduce the unit load in the extreme air condition, such as severe wind speed changes.[0003]In response to the above problems, the prior art proposes a solution, including: When the wind turbine is operating normally in the traditional control mode, the mi...

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Problems solved by technology

[0004] Since the above method only relies on the output power of the wind turbine as the judgment condition, although the pitch change action can be performed in advance under the condition of drastic changes in wind speed and wind direction, the pitch change action will also be performed under normal power generation conditions, resulting in loss of power generation

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