一种新型双馈发电机转子位置估算方法研究

Research on a Novel Doubly Fed Generator Rotor Position Estimation Method

针对双馈感应发电机(DFIG)的无位置传感器控制,提出一种基于转子电流的模型参考自适应系统(MRAS)转子位置估算方法。MRAS的关键技术在于参考模型和可调模型的选取,将测试所得两相旋转坐标的转子电流作为可调模型输出,将定子电压和电流计算得到的转子电流作为参考模型输出。通过对误差信号的比例积分(PI)调节获得转子位置信息,使得参考模型与可调模型的输出偏差为零,实现了转子相位的精确估算。最后,通过仿真和实验验证了理论分析和设计的可行性和正确性。

For doubly fed induction generator（DFIG） sensodess control, a model reference adaptive system（MRAS） ro- tor position estimation method based on rotor current is proposed.The key technology of MRAS is the selection of ref- erence model and adjustable model.The measured rotor current in two-phase rotating coordinate system acts as ad- justable model output, and the rotor current obtained through calculation of stator voltage and current acts as referential model output.Rotor position information is obtained through the proportional integral （P I） adjustment of error signal,it makes the output deviation between reference and adjustable model is zero.This method realizes the precise estimate of rotor phase.Finally the correctness and feasibility of the proposed method is verified by simulation and experiment.