Research on DC-Side Voltage Fuzzy Control Method of Shunt Active Power Filter

On the basis of traditional PI control for DC-side voltage of Active Power Filter (APF), a parameter self-adjusting fuzzy PI control method is designed in this paper. In order to adjust the parameter itself, it is can be used fuzzy control rules to control the fuzzy output variables according to fuzzy input variables. The simulation results show that the method has smaller overshoot, faster response and can also meet DC-side voltage control requirements under situation of the load mutations. The effect of parameter self-adjusting fuzzy PI control method is better than traditional PI control method.