| With the energy crisis intensifies, as an important new energy power generation technology, wind power generation technology is getting more and more attention. Among them, the permanent magnet direct drive wind power system has been widely used due to its advantages of high efficiency and high reliability. This paper mainly studied the permanent magnet synchronous wind generator control technology of the permanent magnet direct-drive wind power generation system and some innovative ideas were proposed.Firstly, this paper introduces the development background and the main topology structure of the wind power system, and mainly focuses on the advantages of direct drive wind power system. Then, the main research content of this article is introduced.Secondly, this paper studies a mathematical model simplified method of permanent magnet synchronous wind generator, and designs a simulation model building method of permanent magnet synchronous wind generator based on MATLAB/SIMULINK. The proposed method simplifies the mathematical model of permanent magnet synchronous wind generator based on triangle function operation, which unified the mathematical model of the salient pole permanent magnet synchronous wind generator and non-salient pole permanent magnet synchronous wind generator. In addition, considering that the MATLAB/SIMULINK based simulation model of permanent magnet synchronous wind generator cannot directly change generator parameters and cannot simulate the nonlinear characteristics of the generator, the designed MATLAB/SIMULINK simulation model of permanent magnet synchronous wind generator in this paper overcomes these drawbacks. As a result, the simulation accuracy is improved.Thirdly, this paper researches a maximum torque per ampere control method of permanent magnet synchronous wind generator. This method combines the advantages of the direct calculation method and the perturbation observation method, and overcomes their disadvantages, so as to effectively improve the maximum torque per ampere control precision of permanent magnet synchronous wind generator. The simulation results verify the effectiveness of the proposed algorithm.Finally, the research content in this paper is summarized and prospected, and the main work in the future is pointed out. |
