Abstract:In order to improve the reliability of the wind turbine,the present situation of the condition monitoring technology and network structure in wind turbine transmission chain were analyzed,and a kind of condition monitoring system based on cable network was proposed,which has high reliability and huge capacity of datum transmission.The system consists of two kinds of online realtime monitoring technologies,the vibration monitoring technology and oil monitoring technology,combines with SCADA data,which can improve the diagnosis and early warning accuracy of transmission chain latent failure and early fault.The system has been installed in the 15 MW doublyfed wind turbine for demonstration application.Realtime datum from vibration sensors,oil sensor and wear particle sensor on a same transmission train,canl be used in data mining and information fusion for the next step.