Control of Horizontal Axis Wind Turbine with Synchronous Generator to Capture Maximum Energy of Wind

Three types of generator named wound rotor synchronous generator (WRSG), permanent magnet synchronous generator (PMSG) and doubly fed induction generator (DFIG) are usually used in variable speed horizontal axis wind turbines. Synchronous generator with controlled excitation voltage is a proper solution for power production in rotational speed lower than the nominal. In this paper, excitation voltage controller is designed to capture maximum energy of wind and pitch angle controller is designed to regulate the rotational speed of rotor when wind speed is over the rated value. Simulation results are verified by means of HIL (Hardware In the Loop) test setup. In this case, the function of controllers are examined in a turbulent wind condition on a simulator and the performance is analyzed. Finally, it is concluded that MPPT (Maximum Power Point Tracking) algorithm can be performed by controlling the excitation voltage of a synchronous generator in a below rated condition

Innovative approach to computer-aided design of horizontal axis wind turbine blades

The design of horizontal axis wind turbine (HAWT) blades involves several geometric complexities. As a result, the modeling of these blades by commercial computer-aided design (CAD) software is not easily accomplished. In the present paper, the HAWT blade is divided into structural and aerodynamic surfaces with a G1 continuity imposed on their connecting region. The widely used method of skinning is employed throughout the current work for surface approximation. In addition, to ensure the compatibility of section curves, a novel approach is developed based on the redistribution of input airfoil points. In order to evaluate deviation errors, the Hausdorff metric is used. The fairness of surfaces is quantitatively assessed using the standard strain energy method. The above-mentioned algorithms are successfully integrated into a MATLAB program so as to enhance further optimization applications. The final surfaces created by the procedure developed during the present study can be exported using the IGES standard file format and directly interpreted by commercial CAD and FE software