Wind driven generator coating fatigue life optimization design method considering raindrop erosion

Abstract

The invention discloses a raindrop erosion-considered wind driven generator coating fatigue life optimization design method. The method comprises the following steps: constructing a wind driven generator blade coating fatigue life agent model based on a Kriging method; constructing probability distribution of wind field wind speed and rain field rainfall intensity in consideration of an actual service environment; designing the rotating speed of the wind-driven generator by taking the maximum generating capacity of the wind-driven generator as a target function; constructing a constraint equation by combining the fatigue life change characteristics of the blade coating with different rainfall intensities; constructing an initial optimization point for optimization by adopting wind power utilization coefficient characteristics; the optimal rotating speed of the wind driven generator under different rainfall intensities and wind speeds is obtained through a traditional optimization calculation method. According to the method, the fatigue life of the blade coating of the wind driven generator can be effectively prolonged under the condition that the annual energy output of the wind driven generator is reduced to the minimum, and a new thought is provided for optimizing the fatigue life of the coating of the wind driven generator.

Description

technical field [0001] The invention relates to the field of fatigue optimization of wind power generators, in particular to a design method for optimizing the fatigue life of wind power generator coatings in consideration of raindrop erosion. Background technique [0002] In recent years, in order to make better use of wind energy, the capacity of a single wind turbine has been continuously increasing, resulting in the continuous increase of structural size parameters such as the diameter of the wind turbine impeller. However, due to the long-term impact of rain erosion, hail impact, sand and gravel friction on the leading edge of the blade, and the high linear velocity of the blade when the fan is working, it is easy to cause erosion of the leading edge of the blade, resulting in fatigue damage to the coating and a decrease in aerodynamic performance. Larger blade size means greater blade tip speed and contact area, which will lead to more serious erosion of the leading ed...

AI Technical Summary

Problems solved by technology

This type of method is more effective in preventing erosion, but multiple customized designs are required for different fan blade surface structures and fan service environments

Also, for regular maintenance, frequent shutdown inspections can lead to wasted wind turbine production in the absence of coating damage

For the reduced speed method, there is currently no method to quantify it

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