Time Domain Characteristic Analysis of Wind Turbine Tower Load Based on Imbalanced Fault of Wind Wheel

The mechanical load of wind turbine is complicated and changeable under the imbalanced fault of wind wheel, which intensifies the influence of fatigue load on the service life of main components and the generation quality of wind turbine. The mechanism model of imbalanced load change of wind turbine is established. Aiming at the imbalanced load of wind turbine caused by two phenomena of wind turbine mass imbalance and aerodynamic imbalance, the time domain characteristics of mechanical load change on the top of tower drum are analyzed by GH Bladed wind turbine load simulation software to identify the change of characteristic parameters. The simulation results show that the two cases of imbalanced wind turbine will lead to the increase of fatigue load and limit load of wind turbine, which will destroy the stability of wind turbine. There are some differences in fault phenomena. The research results can provide basis for reverse reasoning and location of imbalanced wind turbine fault.