双馈风力发电机无速度传感器控制研究

Research on the Control of Doubly-fed Induction Wind Power Generator without Speed Sensor

间接利用定子、转子电流间的比例关系,分析转子电流和转子位置观测之间的关系,提出了一种基于PQ功率转子位置观测法的DFIG矢量控制策略,这种控制策略克服了其他速度观测方式在同步速运行时观测不准的缺陷,具有较宽广的运行范围,能够取得与有速度传感器控制相似的稳态性能。最后构建了DFIG仿真与实验平台,对所述无位置传感器控制策略进行了仿真与实验验证。仿真结果和试验结果证明了这个控制方法的正确性与有效性。

The proportional relation of the current of stator and rotor is indirectly used to analyze the relation of the rotor current and rotor position observer. By analyzing the simulation results a vector control strategy for doubly - fed induction generator （DFIG） based on PQ - power rotor position observer is proposed. This control strategy overcomes the drawback of incorrect observation in other speed observer methods when running at the synchronous speed. The proposed control strategy has wider speed range, and can achieve the control per- formanee similar as the control method using speed sensor. Finally, a DFIG experimental system is built up and the experiments are per- formed. The simulation and experimental results have a good agreement verifying the effectiveness of the proposed control method.