Abstract
The aim of this work is to study and compare two methods for maximum power point tracking (MPPT) for megawatt wind energy conversion systems. The performance of the optimal tip speed ratio control (TSR) and the optimal torque control (OTC) is analyzed using Matlab/Simulink model of a wind turbine with direct driven permanent magnet synchronous generator (PMSG) connected to the grid via full scale back-to-back converter. The simulation results show that the OTC has positive effect to the studied system's stability, minimizing the power fluctuations. The response to wind speed variations of the TSR method is faster but it leads to mechanical stress in the system.
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