FMECA And Control For Over-temperature Fault Of Wind Turbine Generator Systems

Overheating alarm occurred in the nacelle is one of the most common failure modes in wind turbines. Load-down operation of a wind turbinecaused by overheating component has happened in many domestic wind farms, which leads to large economic loss. Due to the complexity of wind turbines, there are too many reasons of the overheating fault. The fault mode and its effect is different. Hence, it is significant to study the overheating modes and effect for promoting the availability and economy of wind turbine devices.In this article,50 2MW wind turbines of type H-93 made in Haizhuang Wind Powre Equipment in Guanyun wind farm were studied. The failure mode and effect analysis and criticality analysis of the gearbox and generator were studied. On that basis, solution plan for the overheating problem was proposed and verified with test with significant effect. Detailed research and key technique is as follows:(1) Aiming to the frequent overheating fault of the key devices of a wind turbine (gearbox, generator and control cabinet), the effect of overheating fault is analyzed with the data of Guanyun wind farm. The effect of overheating fault on efficiency is discussed. The statistical result of Guanyun wind farm devices with overheating fault for the availability and generating capacity is given.(2)Aiming to the overheating fault modes, based on the actual operation data of Guanyun wind farm, the failure mode and effects analysis (FMEA) and criticality analysis has been conducted. Obtained the FMECA analysis table and criticality matrix analysis figure of the wind turbine gearbox, generator and converter under overheating fault, and confirmed the most serious factors of overheating fault. According to the result of overheating fault FMECA analysis, a scheme to solve wind turbines overheating fault and improve the efficiency was proposed combining the actual operation experience of wind turbines and fault statistics. Through the implementation of the scheme, the problems of overheating was solved, and overall improve the performance of wind turbines was improved.(3) According to the FMECA result of overheating fault, optimizing plan for solving the overheating fault and promoting the efficiency has been proposed and implemented with experiment and fault statistics of H-93 wind turbines. The proposed plan has achieve optimizing effect.