基于竞争失效的风电机组齿轮箱轴承剩余寿命分析

REMAINING USEFUL LIFE ANALYSIS OF GEARBOX BEARING OF WIND TURBINE BASED ON COMPETITION FAILURE

提出考虑退化失效和突发失效之间存在竞争失效的风电机组齿轮箱轴承可靠性评估方法,结合风电场SCADA实时监控数据,将轴承监控温度、振动数据通过主成分分析方法融合,以描述轴承退化程度。考虑风电机组齿轮箱轴承的特殊性,采用改进的比例危险模型,基于Wiener退化过程和Weibull突发失效过程,建立竞争失效可靠性评估模型。通过实例分析,对比退化失效和突发失效竞争模型、不相关模型及独立退化失效、突发失效模型的剩余寿命,验证了竞争模型的可靠性。

Considering the relationship between degradation failure and outburst failure,a reliability evaluation method for gearbox bearing of wind turbine with competition failure is proposed.Combining with the real-time monitoring SCADA data of wind farm,the monitoring temperature and vibration data of bearing are fused by principal component analysis to describe the degree of bearing degradation.Based on the specific characteristics for gearbox bearing of wind turbine,the reliability evaluation model is used to build on the improved proportional risk model,degradation failure is assumed to be Wiener degradation process and outburst failure is assumed to be Weibull distribution.Through example analysis,comparing the model of remaining useful life,uncorrelated model and independent degradation failure and sudden failure have low efficiency,the reliability of the competition failure model is verified.