Shutdown control method, shutdown control device and wind generating set
A technology of a wind power generating set and a control method, which is applied in the direction of wind power generators, control of wind power generators, wind power generation, etc., and can solve problems affecting the safety of wind power generating sets, impeller system stall and flutter, etc., so as to ensure power generation efficiency and improve aerodynamic damping , to avoid the effect of stall flutter
Pending Publication Date: 2022-04-08
JIANGSU GOLDWIND SCI & TECH CO LTD
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Problems solved by technology
[0003] Although this method can prevent the occurrence of stall flutter to a certain extent, it also has corresponding risks, mainly manifested in that when the yaw system fails, such as power failure, the engine room cannot be controlled to drive the impeller to move relative to the tower according to the risk. Will make the impeller system also have the risk of stall flutter, affecting the safety of wind turbines
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[0048] Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention; and, for clarity, the dimensions of some structures may have been exaggerated. Furthermore, the features, structures, or characteristics described hereinafter may be combined in any suitable manner in one or more embodiments.
[0049] The orient...
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The invention relates to a shutdown control method, a shutdown control device and a wind generating set. The shutdown control method comprises the steps that shutdown information of the wind generating set is obtained; and at least one blade is controlled to rotate by a preset angle relative to the hub according to the shutdown information, so that the difference value of the absolute values of the pitch angles of at least two blades in the multiple blades reaches a preset threshold value range, and the value range of the lower limit value of the preset threshold value range is 2-5 degrees. According to the shutdown control method, the shutdown control device and the wind generating set provided by the embodiment of the invention, stall flutter of the wind generating set after shutdown can be effectively avoided when the yaw system of the wind generating set fails, and the power generation benefit of the wind generating set is ensured.
Description
technical field [0001] The invention relates to the technical field of wind power, in particular to a shutdown control method, a shutdown control device and a wind power generator set. Background technique [0002] When the wind turbine is shut down, when the wind speed is high and the yaw angle is too large, the impeller system of the wind turbine will stall and flutter, resulting in excessive load on the blade root, thereby destroying the structure. In order to avoid the occurrence of flutter when the wind turbine is shut down, the yaw system is usually required to track the wind direction when the wind turbine is shut down, and the yaw system is controlled according to the wind direction so that the nacelle drives the impeller system to move relative to the tower, so as to avoid the excessive wind angle of the yaw and prevent The occurrence of stall chatter. [0003] Although this method can prevent the occurrence of stall flutter to a certain extent, it also has corresp...
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IPC IPC(8): F03D7/02F03D7/04
CPCY02E10/72
Inventor 周经纬闻笔荣唐浩
Owner JIANGSU GOLDWIND SCI & TECH CO LTD