风力发电系统中双馈异步发电机的仿真研究

Modeling and Simulation of Doubly Fed Induction Machine for Wind-Energy Generating System

该文利用坐标变换技术,推导了双馈感应风力发电机在d-q坐标系下的数学模型,基于变速恒频矢量控制原理在MATALAB\SIMULINK环境下分别用现成的几种基本模块和S函数两种方法搭建了相应的动态仿真模型,对双PWM变频器励磁的变速恒频双馈异步发电机模型进行了仿真研究。仿真结果表明了模型的正确性,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。最后对两种建模方法的仿真速度作了比较,结果表明仿真速度取决于模型中模块的数量,积分函数在仿真过程中最耗时,使用S-函数能有效地提高仿真速度。

The paper deduces the mathematic model of doubly fed induction machine in the qd frame using the reference frame transformation technology, builds the corresponding dynamic simulation model based on variablespeed constant - frequency vector control in MATLAB/SIMULINK respectively with two methods of existing fundamental modules and S - Function, and studies the simulation model of double PWM convertor excited doubly fed induction machine based on variable - speed constant - frequency. The results show the machine model＇s correctness and provide a credible foundation for further study on wind power system. Finally, the simulation speeds of the above mentioned two modeling methods are compared. The simulation results show that the simulation speed depends on the number of blocks used in a model, the function integration is the most time consuming procedure during the simulation, the S - Function can efficiently increase the simulation speed.