160kW永磁直驅(qū)風力發(fā)電機的設計與優(yōu)化
[Abstract]:With the increasingly prominent problems of energy and environment, the development of clean energy has become the strategic choice of all countries in the world. Wind energy has become one of the main forces of new energy because of its clean and efficient advantages. The permanent magnet direct drive wind turbine saves the transmission gearbox with high failure rate, thus reducing the maintenance cost of the fan and improving the reliability of the wind power system. The background and prospect of wind power generation is the significance of this topic. After expounding the advantages and disadvantages of different classification of permanent magnet synchronous generator (PMSM), the radial table structure is selected as the basic structure of PMSM. According to the basic theory of motor design, the initial electromagnetic design scheme of 160kw permanent magnet direct drive wind turbine is completed in this paper. In order to optimize the starting resistance torque of permanent magnet direct drive wind turbine and improve the utilization rate of wind energy, a new method of magnetic pole packet migration is proposed to weaken the slot torque of meter-mounted permanent magnet motor. After thoroughly analyzing the generating principle of slot torque, the formula for calculating the offset angle of this migration method is given, and the correctness of the formula for calculating the offset angle of magnetic pole is verified by the parametric analysis module of Maxwell. The law of grouping number selection is summarized, and the correctness of the law is verified by finite element simulation of different grouping numbers of the prototype. The results show that this migration method can reduce the slot torque of permanent magnet motor succinctly and effectively. After the optimization of slot torque, this paper overcomes the disadvantage of long period of traditional finite element optimization of motor. Genetic algorithm is used to optimize the other parameters of generator, taking the efficiency, power factor and economy of generator as multivariate objective function. The program of Matlab genetic algorithm is compiled, and the design scheme before and after optimization is analyzed. Finally, the operation characteristic simulation and prototype experiment of the optimized generator scheme are carried out, and the rationality of the design scheme is verified by the simulation and experimental results.
【學位授予單位】:上海電機學院
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TM315
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