双馈风力发电系统的建模与运行特性研究

双馈风力机是一种绕线式异步发电机,可以实现变速恒频运行,提高风能利用率,并减少对电网稳定性的影响。本文对双馈风力系统的结构进行了研究,分析了其实现最大风能捕获的工作原理,建立了风力发电机的数学模型,并分析了基于定子交轴电流和直轴电流的有功功率、无功功率解耦控制的基本原理,然后讨论了双馈风力发电机在两种运行状态的能量流动过程,最后运用Mtlab/Simulink仿真分析了双馈风力发电机的运行特性,验证了理论分析的正确性。

Research on the Modeling and Operation Characteristics of Doubly-fed Wind Power System

Doubly-fed induction generator(DFIG) is a wound rotor asynchronous generator,which is easy to realize the control of variable speed constant frequency,to improve the wind power utilization,to decrease the influence on the stability of power grid.Doubly-fed wind power system is researched in this paper.The working principle of maximum wind energy capturing is analyzed.The dynamical model of DFIG is built and the principle of decoupling control between the d axis current,q axis current and active power& reactive power is analyzed.Then this paper discusses the energy flow of DFIG as it operates in two states.Finally,the operation characteristics of double-fed wind power generator are analyzed using Matlab/Simulink simulation.