并联有源电力滤波器双滞环电流控制策略

Double hysteresis current control strategy for shunt active power filter

提出了一种基于最优电压矢量的并联有源电力滤波器双滞环电流控制策略,用于快速控制三相有源电力滤波器的相间误差电流,同时可减少高次谐波、加快响应速度。采用滞环比较器确定参考电压矢量所在的区域,另根据误差电流矢量的越界情况及所在区域采用不同的控制策略来选择输出开关矢量,同时,引入当前开关状态信号和各相电流幅值信号,来辅助开关矢量的选择。仿真结果证明了该方法的有效性和可行性。

A novel double hysteresis current control strategy based on optimal voltage vector is proposed for shunt active power filter （SAPF）. This new strategy can well control inter-phase error current, decrease high-order harmonics and increase responding velocity. Hysteresis comparators are adopted to determine the location region of reference voltage vector, output switching vector is selected according to the location area of error current vector and whether the error current is beyond the mark. Meanwhile, the switching state and phase current signal is used to assist the output vector selection. Simulation results show that the proposed novel method is valid and feasible.