Abstract
Wind power generation has the advantages of high conversion efficiency, high reliability, and flexible control. The widely used grid-connected wind power generation system is mostly adopted asynchronous generator, which has low efficiency. Therefore, A direct-wind power generation system based on a permanent magnet synchronous generator is proposed in this paper. By studying the characteristics and operation mechanism of wind turbines and permanent magnet generators, wind speed, wind turbine, permanent magnet synchronous generator, and direct-drive wind power control system models are established. Aiming at the characteristics of low conversion efficiency and low reliability of traditional wind power systems, a vector control method for the generator side converter based on the rotor magnetic field orientation is proposed in this paper, which achieves the maximum wind energy capture and greatly improves the efficiency of the generator. Finally, the direct-drive wind power system was built by Matlab simulation, which verified whether the system could stably capture wind energy and output energy to the maximum extent under the condition of wind speed change.
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