双馈风力发电无差拍解耦控制

Deadbeat Decoupling Control of Doubly-fed Wind Power Generation

建立了双馈风力发电系统中双馈异步发电机(DFIG)的数学模型,提出了d,q旋转坐标系下无差拍解耦控制策略。该方法将周期内的电流误差信号转化为电压信号,使下一周期实际转子电流跟踪参考电流,得到的电压信号作为电压空间矢量脉宽调制(SVPWM)给定,实现对d,q轴给定电流的快速跟踪。同时采用基于定子磁链定向的矢量控制策略,实现d,q轴电流的解耦控制。仿真和实验结果验证了该方法的正确性和可行性。

This paper establishes mathematic model of DFIG in doubly-fed wind power generation,proposes deadbeat decoupling control strategy in the d,q rotating coordinates.The current difference signal of this cycle is transformed to voltage signal,so that the next cycle of the actual rotor current track the reference current,a voltage signal obtained is given as the input of SVPWM,which achieves fast tracking for the given d-axis and g-axis currents.The vector control based on stator flux orientation is used,which realizes the decoupling control for the d-axis and g-axis currents. The simulation and experimental results show that the method is valid and feasible.