Wind turbine generator set fatigue state monitoring method

Abstract

The invention relates to a wind turbine generator set fatigue state monitoring method. According to the method, an information collection system and a fatigue computing system are established by additionally arranging strain gages on critical components of a set to compute the current state of fatigue of the set, and an existing SCADA (supervisory control and data acquisition) network in a wind farm can serve as information transmitting network. The wind turbine generator set fatigue state monitoring method has the advantages of combining the modern measurement technique with the fatigue theory, establishing the information collection system and the fatigue computing system by additionally arranging the strain gages on the critical components of the set, and reproducing the current state of fatigue of the set through analysis. The current state of fatigue of all sets in the wind farm can be intuitively learned to perform effective and reasonable output distribution and maintenance for the sets, so that good returns can be obtained for the wind farm.

Description

technical field [0001] The invention relates to a method for monitoring the fatigue state of a wind turbine. Background technique [0002] Fatigue research in my country started relatively late, but has developed rapidly in the past 30 years. Aeronautical department has taken fatigue design as a main content of aircraft parts design. In the general mechanical design department, fatigue design is rarely considered. There are two main reasons: on the one hand, domestic mechanical designers have insufficient understanding of the importance of fatigue problems; on the other hand, there is a lack of detailed and comprehensive fatigue performance data and fatigue design data of domestic mechanical materials in China. Domestic fatigue analysis work basically relies on some foreign fatigue analysis software, such as MSC.Fatigue, ANSYS, FE.SAFE and so on. This limits the application of fatigue analysis by engineers and technicians to a certain extent. [0003] The fatigue of the ...

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Problems solved by technology

This limits the application of fatigue analysis by engineers and technicians to a certain extent

[0003] The fatigue problem of the main shaft and bolts of the wind turbine is related to the performance of the entire wind turbine. However, few people in China have studied this issue

Domestic wind power companies are still in the stage of importing and absorbing the design and verification of the main shaft and high-strength bolts involved in megawatt-scale wind turbines, and cannot independently develop them.

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