电源电流控制的并联有源电力滤波器研究

Research on Shunt Active Power Filter based on Supply Current Control Method

介绍了并联有源电力滤波器(APF)的一种新的控制方式,即电源电流控制方式,该控制方式与传统控制方式是完全等效的。采用带有自调整因子的模糊控制规则设计了逆变器直流侧电压的模糊控制器,并将模糊控制与PI控制相结合,设计了复合控制器,使其兼具模糊控制鲁棒性强和PI控制稳态精度高等优点。实验结果表明,新的控制系统完全能够补偿谐波和无功电流,并且具有电压超调量小、电流冲击小等优点。

A new control method for the shunt active power filter,namely supply current control method is used,this control method is completely equivalent to the traditional control method.The fuzzy control rule with the self-adjustment factor is employed to design the fuzzy controller for inverter DC side voltage, and the combined controller is designed through the combination of the fuzzy control with the PI control, which makes the controller has the advantages of the fuzzy control＇s robustness strong and the PI control＇s high precision at stable conditions.The experimental results show that the new control system can definitely compensate the harmonic and the reactive current, the voltage overshoot and the current impact is small, and so on.