三相有源电力滤波器滑模解耦控制方法研究

发布时间：2019-04-13 14:49

【摘要】：针对电网中存在的大量谐波给电网和其他设备造成危害的问题,根据直流侧电压的变化远小于电流的变化的特点,把直流侧电压作为常量,将模型化简为只有电流作为状态变量,采用渐近率的方法设计滑模函数,得到解耦的有源电力滤波器滑模控制模型,并从理论上证明其稳定。考虑到直流侧电压的波动主要来源于有源电力滤波器与电网的能量交换,以直流侧电压偏差及偏差变化率作为输入条件,采用PI调节器来控制直流侧电压,输出基波有功分量,来补偿解耦有源电力滤波器滑模控制模型输出的补偿电流量。实验结果表明,本方法不仅能够保证系统稳定,而且在负载发生突然变化时保证控制方法的鲁棒性。
[Abstract]:In view of the harm caused by a large number of harmonic waves to the power grid and other equipment, the DC side voltage is taken as a constant according to the characteristic that the DC side voltage change is much smaller than the current change. The model is simplified as only the current as the state variable, and the sliding mode function is designed by using the asymptotic rate method. The decoupled sliding mode control model of active power filter is obtained, and the stability of the sliding mode control model is proved theoretically. Considering that the fluctuation of DC side voltage mainly comes from the energy exchange between active power filter and power network, taking the DC side voltage deviation and deviation rate as input conditions, the PI regulator is used to control the DC side voltage and output the fundamental active power component. To compensate the compensated current output from sliding mode control model of decoupled active power filter. The experimental results show that this method can not only ensure the stability of the system, but also guarantee the robustness of the control method when the load changes abruptly.
【作者单位】：南京航空航天大学自动化学院;中南大学物理与电子学院;
【基金】：国家自然科学基金(61273159,61105080) 湖南省自然科学基金委员会与株洲市政府自然科学联合基金资助(13JJ9038) 中国博士后科学基金(2012M511752)
【分类号】：TN713.8;TM76

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