三相并联型有源滤波器控制方法研究

Research on Control Approaches for the Three-Phase Shunt Active Power Filter

介绍了基于虚拟磁链的有源滤波器直接功率控制工作原理,提出了一种针对于三相三线制有源滤波器的控制方案。该方案采用虚拟磁链进行定向,省去了常规电压定向所使用的电压传感器。利用矢量调制环节发出驱动脉冲,实现恒频控制。提出将模糊PI控制器应用于直接功率控制系统的电压控制环节,具有鲁棒性强和动态响应速度快等优点。仿真结果证实了所设计的基于虚拟磁链的有源滤波器直接功率控制系统的正确性和有效性。

In the paper, working principles of the direct power control for the active power filter based on virtual fluxwas introduced, and a new control scheme for the three：phase three-wire active power filter was proposed. In thescheme, virtual flux was used to oriente, and the use of the voltage sensor in the conventional voltage orientation wasomitted. As to attain the frequency control , the driving pulse was produced by the space vector pulse modulation（SVPWM）link. At the same time, the fuzzy PI controller was applied to the voltage control link of the direct powercontrol system, with robustness and fast dynamic response as the advantages. The simulation results verified that thedirect power control system for the active power filter based on virtual flux designed in this paper was correct andeffective.