基于风机基础损伤前后的SCADA振动数据对比分析研究

Analysis and Contrast of SCADA Vibration Data before and after the Damage of Wind Turbine Foundation

风机基础损伤是长期累积的效果,通过对基础损伤前后时期的SCADA数据进行统计分析,发现风机基础损伤前后时期的机舱振动加速度数据有明显差异,x、y两个方向的振动幅度均会变大,尤其是x方向的振动变化更为明显。筛选出损伤前后时期维护停机状态下的振动数据,利用自适应最稀疏时频分析方法得到固有圆频率,结果表明基础损伤后固有圆频率有所降低,但幅度不大。通过SCADA振动数据可以对基础结构的损伤的预判提供参考依据,对保证风机的正常运行具有重要意义。

The damage of wind turbine foundation is a long-term cumulative effect.Through statistical analysis of SCADA data before and after the damage of wind turbine foundation,it is found that there are obvious differences in the cabin vibration acceleration data before and after the damage of wind turbine foundation,and the vibration amplitudes in both directions of x and y will increase,especially in the direction of x.The vibration data under maintenance and shutdown state before and after damage are screened out,and the natural circular frequency is obtained by using adaptive sparsest time-frequency analysis method.The results show that the natural circular frequency reflected by SCADA vibration acceleration data after foundation damage is reduced,but the amplitude is small.The SCADA vibration data can provide a reference for the damage prediction of wind turbine foundation structure,which is of great significance for ensuring the normal operation of the wind turbine.