基于模糊逻辑的有源电力滤波器直接功率控制

基于模糊逻辑的直接功率控制方法用于并联型有源滤波器,有利于消除非线性负载产生的谐波与无功功率补偿。该方法根据瞬时功率理论将瞬时有功功率和无功功率差值作为模糊控制变量,由模糊规则产生开关状态信号,省去功率滞环比较器,不使用传统的预置开关表。仿真和试验表明,该控制方法能够实现网侧单位功率因数、直流侧电压接近参考值,电能质量得到优化。

Direct Power Control of Shunt Active Power Filter Based on Fuzzy-Logic

Direct power control method based on fuzzy logic for shunt active power filter with compensation of higher harmonics function was presented. Under the instantaneous theory, the instantaneous active and reactive power errors are used as the fuzzy logic control variables, and the switching state selection is chosen by the fuzzy rules, without hysteresis comparators and conventional switching table. The simulation results show that this control strategy has good performance and achieves unit power factor, constant DC voltage, smoothly control in every sector, and better electrical energy quality.