交流励磁双馈风力发电机组的稳定性仿真分析

Analysis of simulation of stability of AC excited double-fed wind generator

介绍了交流励磁变速恒频双馈风力发电机组的工作原理,在坐标变换的技术下,建立了交流励磁发电机在d-q-0坐标系下的数学模型。在Matlab中搭建了系统仿真模块,对交流励磁风力发电机组的稳定性做了仿真分析。仿真结果表明了所建模型的正确性,以及在风力发电系统中利用变速恒频技术后可以大大提高风能的利用率,改善了电力系统稳定性,并且转子转速也可以改变,使其具有独立的无功调节能力。研究结果表明了变速恒频双馈风力发电机组具有良好的动态特性,并为风力发电系统的进一步应用研究提供了可靠的理论依据。

The paper presents the principle of variable speed constant frequency （VSCF） AC exited wind power system. It also builds the d-q coordinate system mathematic model of VSCF AC exited wind power generation system by the coordinate commutation technology, builds the simulink model by Matlab and analyses the stability of double-fed wind generator which is subjected to the interference. The simulation results show that the established model is correct and it can capture as much wind energy as possible, may improve the stability of electric power system, and its rotor speed may adjust and have ability for reactive power regulating in self-help ways. The conclusions provide that VSCF double-fed wind generator possesses good dynamic characteristics and has theoretical foundation for ulteriody studying on wind power system.