基于参数在线辨识的永磁风力发电机无位置传感器控制技术

提出一种基于无位置传感器及电机参数在线辨识的永磁同步风力发电机控制策略。通过建立永磁同步发电机的扩展反电势数学模型,推导出基于锁相环技术的转子位置自检测控制模型。为消除发电机参数时变性对转子位置观测精度的影响,建立了基于递归最小二乘法的电机参数辨识模型,对永磁风力发电机的d、q轴电感进行实时在线辨识,并将实时辨识得到的电机参数应用于发电机转子位置观测和转子磁场定向矢量控制中。建立了一套2kW的永磁风力发电机实验机组,对所提控制策略的有效性和可行性进行了实验验证。

Sensorless Control Technique of PMSG for Wind Power Application Based on On-line Parameter Identification

A novel position sensorless control strategy integrated with the on-line parameter identification for a permanent magnet synchronous generator(PMSG) applied to wind power generation was proposed in the paper.Based on PMSG mathematic model,the phase-locked loop technique was used to detect the rotor position.Considering that the position detection accuracy was influenced by the generator parameter variation,the recursive least square algorithm was adapted for PMSG inductance parameters identification.Then,the rotor position and PMSG parameters obtained based on the proposed method were used in the rotor-flux oriented vector control of PMSG for wind power generation system.Experiment on a 2 kW PMSG-based prototype demonstrates that the proposed method is effective and is capable of achieving more accurate control than the generation system without parameter identification.