Research On Active Control Simulation Of Wind Turbine Blade

In recent years,with the continuous expansion of wind power scale,the wind turbine capacity and the size of blade are also constantly increasing.In order to solve the aerodynamic load question caused by large-scale wind turbine,the concept of "smart" blade has appeared in recent years.In this paper,the smart blade with trailing edge flaps is studied in depth based on NREL 5MW wind turbine,the main contents in this thesis are as follows:1)A large-scale wind turbine aerodynamic simulation platform is built by improve FAST software.The effects of position,chord length ratio,length and angle range of trailing edge flaps on load suppression and power capture of large wind turbine blades are studied by this platform.The results show that the wind turbine blades have better effects of load reduction and less power loss under low and transition wind conditions when the trailing edge flaps are located near the blade tip.Increasing chord length ratio,length and angle range of flaps all will improve the ability of load reduction of wind turbine blades under low and transition wind conditions,but will also cause power loss to an extent.There exist a group of optimum values for chord length ratio,length and angle range of flaps to improve the ability of load reduction of blades under high wind conditions,and the changes of these three parameters have no effects for power capture.2)Based on the analysis of the influence of trailing edge flaps structure parameters for the aerodynamic performance of the wind turbine,a typical configuration of trailing edge flaps are selected to verify performance of the aerodynamic and control system of the wind turbine.The results show that the trailing edge flaps can effectively reduce the blade load and suppress the fluctuation of the mechanical power;The times and angle of the pitch are obviously reduced when the wind turbine ran in the three zones;The power capture ability of the wind turbine is reduced to a certain extent running in the second zone.3)In order to verify the effect of the trailing edge flaps for the wind blade,the dSPACE real-time simulation system is used to design the hardware-in-the-loop simulation platform.A lot of experiments are carried out on the platform.The experimental results verify the effect of the trailing edge flaps for the wind blade.