The Control And Simulation Of Smart Blade Wind Turbine

With the rapid development of wind powertechnology, wind turbines graduallybecomes more large-scale and offshore. Large systems means increased loads andsystem quality, while also increasing the hardware, engineering and ongoingmaintenance costs. In order to reduce the cost of wind turbine manufacturing, thenew technology is searched to improve the power of wind turbine. So in recent yearsthere has been research on smart blades. In this paper, the control methods ofMicrotab blade airfoil has been research in depth based on NREL5MW windturbine.NACA64-A17airfoil section is selected as experimental subjects to calculateitslift and drag coefficients. Microtab airfoil blade model is made by polyurethane, andhave wind tunnel experiments with the tab height of0mm,2mm,4mm,6mm,8mm, measured the lift and drag of the Microtab wind turbine under the angle ofattack of5,3,0,3,5,7,9and the wind at20m/s. The measureddata is import into the FAST/Simulink, established the Microtab airfoil wind turbinemodel.Based on the standard control of traditional wind turbine: collective pitchcontrol and individual pitch control. An effective hybrid control methods isproposed to control Microtab wind turbine. By FAST and Matlab co-simulation, thebladed root bending moment of hybrid control system and the standard controlsystem is compared for different wind speeds and different angles of attack anddifferent tab heights. The simulation results show that the proposed hybrid controlsystem can keep the power output, and the blade root load is reduced by about10%.The wind turbine can run more smoothly and have effectively reduce on thevibration of the blade root.