Method and device for adaptive adjustment of cut-out strategy

Abstract

The invention provides a method for adaptive adjustment of a cut-out strategy. The method includes the following steps: predicting a wind resource parameter of a wind turbine of each of machine sitesby using a wind speed prediction model; predicting a fatigue load and a limit load of the wind turbine by using a load prediction model according to the predicted wind resource parameter and air density; comparing the predicted fatigue load and limit load with a reference load; and determining the cut-out strategy based on a result of the comparison, wherein the step of determining the cut-out strategy includes the step of determining a cut-out wind speed and output power. The method can predict wind resource parameters of wind turbines for different machine sites, and dynamically optimize thecut-out strategy of the wind turbines according to the predicted wind resource parameters to maximize utilization of wind resources, and the utilization efficiency of the wind turbines is further improved.

Description

technical field [0001] The present invention relates to the technical field of wind power generation, more specifically, to a method and device for adaptively adjusting cut-out strategies. Background technique [0002] Because most of the wind farms are located in the mountains, the operating environment of the wind turbines is harsh, so the repair and maintenance costs of the wind turbines are high. In order to protect the wind turbine and avoid the wind load exceeding the design value under strong wind conditions, the wind turbine will feather the brakes and stop when it detects that the current wind speed is greater than the cut-out wind speed. Among them, the cut-out wind speed is generally a fixed value designed and given by the wind turbine manufacturer. As long as the current wind speed reaches the set cut-out wind speed, the wind turbine will perform shutdown processing. However, the ultimate load of wind turbines is not only constrained by the cut-out wind speed, b...

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Problems solved by technology

Therefore, in the actual working environment of the wind turbine, when the wind speed exceeds the cut-out wind speed, the ultimate load borne by the wind turbine does not necessarily exceed the design threshold. If the wind turbine is shut down at this time, a certain amount of power generation will be lost

[0003] In the process of designing the cut-out wind speed of wind turbines, it is usually necessary to consider economics and safety comprehensively. However, due to the uncertainty of on-site wind resources and the limitations of traditional control methods, the cut-out wind speed can only be selected at a fixed and relatively low speed. Conservative threshold, although this can ensure the safety of wind turbines, it does not take into account the differences in wind resources at the location of each wind turbine, and cannot maximize the economy of wind turbines

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