Nonstandard wind field oriented wind turbine generator fatigue life efficient assessment method

Abstract

The invention discloses a nonstandard wind field oriented wind turbine generator fatigue life efficient assessment method. The steps comprises: 1) according to equivalent fatigue load of a to-be-assessed wind turbine generator under different wind resources, establishing a fatigue load assessment database; 2) detecting actual wind resource value of the to-be-assessed wind turbine generator on a target machine position in a nonstandard wind field, to obtain the equivalent fatigue load corresponding to the actual wind resource value; 3) comparing the equivalent fatigue load with the standard design load of the wind turbine generator, determining whether the fatigue life in the target machine position is in the design range or not; 4) converting the equivalent fatigue load to a corresponding equivalent stress value and calculating a fatigue damage value of the target machine position, and determining whether the fatigue damage value obtained by calculation is in the preset range. The method can effectively assess the fatigue life of the wind turbine generator in the nonstandard special wind field, and is advantaged by simple implementation method, low cost, and rapid and efficient.

Description

Technical field [0001] The invention relates to the technical field of evaluation of non-standard wind farms, and in particular to an efficient evaluation method for the fatigue life of a wind power generator set for non-standard wind farms. Background technique [0002] As a clean and renewable energy source, wind energy has attracted more and more attention from all over the world. The most ideal location for a wind farm address is in a wide and flat area with an altitude close to sea level. In these areas, wind speed can be fully utilized. At present, there are fewer and fewer standard wind farms, and the topography and wind conditions of the wind farm can be developed. More and more complex and environmental conditions are getting worse, so developers have begun to pay attention to the construction of some non-standard wind farms, such as high-altitude areas, hilly areas and other areas. [0003] The wind turbine system is a complex and multidisciplinary system, involving prof...

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Problems solved by technology

[0011] It can be seen from the above that the current calculation method of fatigue life of wind turbines needs to strictly rely on expensive calculation software and complete unit parameters. In non-standard wind farms, due to the complex wind resource conditions and the constraints of multiple conditions, the fatigue life of wind turbines calculated by wind resource combinations with different input conditions is different, so the analysis of the fatigue life of each machine position will be very difficult. Complexity, long calculation time, low calculation efficiency and high cost, and in practical applications, it is usually required to be able to respond quickly and output response results, so the above calculation method of fatigue life is obviously not suitable for non-standard wind fields in practical applications Fatigue life assessment of wind turbines. On the other hand, site-specific assessments in full compliance with standard requirements are time-consuming and costly.

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