中文摘要：

由于补偿电流的时变性和逆变器自身的损耗,若不采取适当的控制措施,有源电力滤波器（APF）直流侧电容电压将发生衰减或较大的波动。为抑制电容电压的波动,提出了采用粒子群PI控制方法,该方法对传统的PI控制方法进行优化设计,提高控制精度,减小系统误差,进而减小电容电压的波动幅值。同时采用空间矢量脉宽调制（SVPWM）进行了脉宽调制,进一步控制电压波动。仿真和实验结果表明了此方法的正确性和可行性。

英文摘要：

Because of the compensation current is time-variant and inverter＇s own losses,if do not take appropriate control measures,active power filter（APF） DC side capacitor voltage will occur decay or large fluctuations.In order to prevent the capacitor voltage fluctuations,a particle swarm PI control method is proposed.This control method is the optimize design of traditional PI control method,the control precision is improved and the system error is reduced,thus the capacitance voltage fluctuation amplitude is deduced.At the same time,the space vector pulse width modulation（SVPWM） is used for pulse width modulation,further control voltage fluctuation.Simulation and experimental results show the correctness and feasibility.