Analysis on time domain characteristics of imbalanced mechanical loads of wind turbine rotor

Firstly, the mechanism model of imbalanced turbine load change is established. Then, to address the imbalanced load of the wind turbine caused by the mass imbalance and aerodynamic imbalance of the wind wheel, the time domain characteristics of the mechanical load change on the top of the tower drum are analyzed using the GH Bladed wind turbine load simulation software to identify the change of the characteristic parameters. The simulation results show that the two inbalance cases of wind turbine will lead to the increase of the fatigue load and ultimate load, thus destroying the stability of the wind turbine. Moreover, there are some differences in the form of the fault. The research results can provide a basis for the reverse reasoning and locating of the wind turbine imbalance fault. © 2020, Solar Energy Periodical Office Co., Ltd. All right reserved.