Method for stall monitoring of wind generating set

Abstract

The invention discloses a method for stall monitoring of a wind generating set. The method comprises the following steps that the running state data and guarantee power curve data of the wind generating set are acquired, and a wind speed interval is selected according to the actual running condition of the set; a guarantee power curve trend function in the selected wind speed interval is solved; operation state data of the wind generating set in the selected wind speed interval are acquired, and edge data positioning is performed; stall boundary preliminary solving is conducted based on the edge data; fine solution on the stall boundary is conducted aiming at the stall of the wind generating set under different conditions; and stall discrimination is performed according to the stall boundary. According to the technical scheme, in the stall boundary construction process, the output trend of the unit is considered, and the actual operation data of the unit are combined, so that the method has better flexibility and reliability, and compared with a single data monitoring method, the method takes data distribution monitoring as a main body and carries out verification through stall related physical quantity monitoring. And the effectiveness and the interpretability of the stall monitoring results are ensured.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method for stall monitoring of a wind power generating set. Background technique [0002] Blades are one of the main components of wind turbines, and their ability to capture wind energy will directly affect the output performance of wind turbines. During the actual operation of the wind turbine, due to blade design, environment and other reasons, the wind turbine stall may occur. This phenomenon is mainly reflected in the decrease of the wind energy capture capacity of the wind turbine, and the output performance is far below the theoretical level. Generally speaking, the occurrence of a wind turbine stall phenomenon will result in a large loss of power generation of the wind turbine or the wind farm. Therefore, it is of great significance to effectively monitor the stall phenomenon of wind turbines to improve the economic benefits of wind farms. [0003] Acco...

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Problems solved by technology

[0006] The present invention mainly solves the technical problem that the actual output of the unit in the original technical scheme has deviation fluctuations and additionally obtains a large amount of auxiliary information, and provides a method for wind turbine stall monitoring. Considering the stall problem of wind turbine operation data in combination with the characteristic changes of wind turbines, in the process of building the stall boundary, it not only considers the output trend of the unit, but also combines the actual operation data of the unit, so it has better flexibility and reliability , compared with a single data monitoring method, the data distribution monitoring is the main body, and the stall related physical quantity monitoring is used for verification, which ensures the validity and interpretability of the stall monitoring results

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