Fault Mode Statistic & Analysis And Failure Diagnosis Of Large-scale Wind Turbines

Recently,with installed capacity of wind turbines increases continuously,the third industry of wind power consisting of operation,research on reliability,maintenance and rapair will be developed into a key point.Failure analysis and diagnosis can support operation, management of spare components and accessories in wind plants,maintenance and repair of wind turbines.In this paper,the two methods are used in reliability analysis of wind turbines.First,with an eye to reliability of wind turbines,fault analysis methods of large-scale wind turbines are investigated.Analysis method FTA,FMEA and FMECA are used in failure statistic and analysis of wind turbine and its subsystems.Second,in allusion to actual operating wind turbines of wind farms,it is presented that fault modes,fault cause,fault effect and fault countermeasure of GE1.5MW and its failure subsystems.It is calculated that fault importance, fault probability grade and fault rate of various failure subsystems.Last but not least,on the basis of research on new method of fault diagnosis,condition monitoring and fault diagnosis system of wind turbines is developed and used in experimentation.