Abstract：The 44# wind turbine of a wind turbine power plant in Shan Xi province had abrupt and intermittent vibration faults in the vertical direction of transmission chain. Aiming at this problem, a tuned mass damper (TMD) device, i.e., a damping device presented here was designed to reduce the level of the wind turbine nacelle vibration. The principle and design flow of this TMD damping device were presented here in detail. The TMD damping device was designed and developed and successfully applied in the wind turbine site. The results showed that under the full-load condition, the wind turbine with the TMD damping device has a vibration reduction effect of more than 40%; the nacelle vibration amplitude of the wind turbine drops significatly, its vibration fault is mitigated and its downtime is obviously reduced.
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