一种应用PIR控制器的双馈风力发电机组电流谐波控制方法

A Method with PIR Controller for the Elimination of Harmonic Currents in a DFIG Based Wind Power System

基于一种应用比例积分谐振(PIR)控制器的双馈风力发电机控制方法及其参数整定原则,对双馈型风力发电机进行了详细地建模分析,结果显示谐波电压和谐波电流造成了系统输出功率以及电磁转矩的波动。研究表明通过引入一种新型的PIR控制器,可以增强对谐波的控制能力,实现多种控制目标。在定子同步旋转坐标系下,当谐振控制器R的谐振频率为6倍工频时,能够对常见的5次、7次谐波电流进行有效的控制,同时不影响基波分量的控制。通过分析控制器参数对系统稳定性的影响,确定了分频段的参数整定原则。在Matlab/Simulink中建立了双馈风电机组的仿真模型,并将该算法应用于一台110kW双馈风力发电地面实验平台。仿真和实验结果都表明了所提控制方法的有效性与实用性。

A new control method with PIR（proportion integration differentiation） controller and parameters tuning method presented for the improvement of harmonics control of a DFIG based wind turbine, especially when it works under distorted network conditions. A detailed mathematical analysis of the DFIG is carried out, which shows the harmonics would cause oscillations of system output power and electric torque. Research is shown that a PIR controller would enhance the control ability of harmonics, and achieve a variety of control targets. In the synchronous reference frame, when the resonant frequency of the controller R is 6 times of the grid frequency, the 5th, 7th harmonic current can be effectively controlled. What＇s more, the R controller does not affect the control of fundamental components. The controller parameters are tuned so as to increase the system stability. A simulation of a DFIG system under distorted conditions has been developed, and the algorithm was successfully applied to an 110kW DFIG based Wind Power Test bench. Simulation and experimental results show the effectiveness and practicality of the proposed control method.