笼型无刷双馈风力发电机有限元分析与仿真

Finite Element Analysis and Simulation of Wind Turbine Generator with Squirrel-cage Brushless Doubly-Fed

在变速恒频风力发电系统的研究中,无刷双馈电机是一种新型变频调速感应电机,在风力发电方面具有广阔的应用前景。在分析笼型无刷双馈电机工作原理和电磁关系基础上,采用交叉短距式定子绕组抑制高次谐波,运用有限元分析方法详细阐述其电磁设计方法。建立双旋转坐标系无刷双馈电机的数学模型,并对其在各种工况下的性能进行仿真研究。结果表明无刷双馈电机具有良好的动、静态运行特性,证明了无刷双馈电机设计与仿真模型的正确性和可行性,为深入研究无刷双馈风力发电系统奠定了理论基础。

Brushless doubly-fed machine（BDFM） is a new kind of AC induction motor with variable-frequency and regulating speed,and it has broad prospects in wind power generation system. Based on the analysis of principle and electromagnetic relationship of BDFM,the approach to decrease higher harmonic was presented by using cross-short-pitch stator winding. The mathematical model of BDFM was established based on dual rotating coordinate system,and the simulation research of BDFM was carried out under various working conditions. The simulation results show that the BDFM has good dynamic and static performances. Therefore,the simulation model of BDFM is correct and feasible. Thus,it lays a foundation for further practicability study of the brushless doubly-fed wind turbine generation system.