Analysis Of Aeroelastic Coupling Dynamic Charateritics Of Wind Turbin Based On Co-Simulation

The enlargement of wind turbines has made the development design and performance analysis of wind turbines more complicated,such as the nonlinear deformation of the blade structure,dynamic stall of dynamic load and strong coupling relationship between aerodynamic load and structural response,These factors increase the difficulty and cost of wind turbine performance analysis.This study combines multi-body dynamics software and wind turbine aerodynamic models,Through Simulink co-simulation,the aeroelastic coupling characteristics of large wind turbines and their control strategies are studied.First of all,according to the structural characteristics of large-scale wind turbines,the flexible components such as wind turbine blades and towers are dispersed into multibody systems connected by springs and damped motion pairs using the "super element" method,combined with the rigid hub and nacelle,the multi-body dynamics model of the wind turbine generator is built in the multi-body dynamics software Adams,The correctness of the model is verified by the modal analysis of the Wind Turbine.Secondly,the modified leaf element-momentum theory was used to develop the aerodynamic load calculation program for large blades,based on the control module in the dynamics analysis software Adams and the Simulink module in the Matlab numerical analysis software,the aerodynamic-elastic-control multi-coupling joint simulation analysis model for large wind turbines is established.Taking a 5 MW large wind turbine as an example,the aeroelastic coupling analysis of the wind turbine is performed to reveal the aeroelastic coupling characteristics of the large wind turbine,and then the performance of the wind turbine is accurately analyzed.Based on the Co-simulation model,combined with the variable-speed pitch control strategy,a control model is established,and analyze the aerodynamic performance and structural nonlinear response of the large-scale wind turbine under variable speed pitch and yaw control actions.The research results show that the Co-simulation model can accurately describe the nonlinear flexible deformation and structural vibration of the blades with less degrees of freedom,and efficiently and accurately realize the aeroelastic coupling simulation analysis of large wind turbines,as well as pitch and yaw.The research work in this paper provides a reliable simulation analysis method for the development of large-scale wind turbines,and has important engineering application value for reducing the cost of wind turbine performance analysis and shortening the development cycle of wind turbines.