| Title |
Design of Speed Controller for Stall Blade Wind Turbine Complying with the Speed Limit During Speed Overshoot |
| Authors |
Ye-Chan Kim ; Seung-Ho Song |
| DOI |
https://doi.org/10.6113/TKPE.2022.27.5.438 |
| Keywords |
Stall blade; Type 4 wind turbine; PI Speed controller; Speed overshoot |
| Abstract |
Blade efficiency decreases when the rotor speed is kept constant even though the wind speed is higher than the rated value. Therefore, a speed controller is used to regulate the rotor speed in the high-wind-speed region. In stall-blade wind turbine, the role of the speed controller is important because precise aerodynamic regulation is unavailable. In this study, an effective parameter design method of a PI speed controller is proposed to limit the speed overshoot of a type 4 wind turbine with stall blades even though wind gust occurs. The proposed method considers the efficiency characteristics of the stall blade and the mechanical inertia of the wind turbine rotor. It determines the bandwidth of the speed controller to comply with the speed limit during generator speed overshoot for the worst case of wind gust. The proposed method is verified through intensive simulations with a MATLAB/SIMULINK model and experimental results obtained using a 3 kW MG set of wind turbine simulator. |