永磁电机在风力发电系统中的应用及其发展趋向.pdf

11 2012 年 3 月 电 工 技 术 学 报 Vol.27 No. 3 第 27 卷第 3 期 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Mar. 2012 永磁电机在风力发电系统中的 应用及其发展趋向 王凤翔 （沈阳工业大学电气工程学院 沈阳 110870 ） 摘要 永磁电机具有功率密度大、效率高和运行可靠等优点，在风力发电系统中得到广泛的 应用。然而由于稀土永磁材料的成本较高，永磁风力发电机也面临着如何提高性能价格比的挑战。 本文在对比分析高速、中速和低速直接驱动风力发电系统的特点与性能的基础上，阐述了永磁风 力发电机的关键设计技术；分析了电机结构、极数和槽数配合对于电机性能的影响，防止永磁体 失磁的方法以及发电机与变流器参数的合理匹配问题。此外，还论述了永磁风力发电机设计与控 制技术的发展趋向。 关键词：风力发电系统 永磁发电机 设计特点 关键技术 发展趋向 中图分类号：TM351 Application and Development Tendency of PM Machines in Wind Power Generation System Wang Fengxiang （Shenyang University of Technology Shenyang 110870 China ） Abstract Permanent magnet(PM) machine has advantages of high power density, high efficiency and high reliability, and has been using widely in the wind power generation systems. However, the PM wind generators face the challenge of how to increase the ratio of performance to the cost due to the expensive rare earth PM material. In this paper, based on the comparative study on the feature and performance of PM generators for high speed, medium speed and low speed direct-driven wind power generation systems, the key design techniques of PM wind generators are explained. The influence of machine structure and combination of pole-slot number on the performance, the prevention of permanent magnet from demagnetizing, and the reasonable matching between generator and converter are analyzed. Besides, the development tendency of design and control technology of the PM wind power generators is discussed. Keywords ：Wind