并联型有源电力滤波器软起动控制研究

Research on the Soft-Starting Control Strategy of Shunt Active Power Filters

针对有源电力滤波器(Active Power Filter,简称APF)起动时补偿后的电网电流过冲,提出了一种控制瞬时有功电流直流分量的新型起动控制方法。该方法在起动时将瞬时有功电流的直流分量进行相应的缩小,然后逐步增大该分量,直至增加到100%,再通过直流侧电压的比例积分控制,将直流侧电压稳定地控制在参考值附近。这样通过对直流侧电压上升速度和参考值的控制,抑制了起动时补偿后电网电流的过冲,也有利于各种保护功能动作。仿真和实验结果证实了该方法的可行性。

Focussed on the over current when Active Power Filter （APF） is starting,a novel start method for controlling the DC component of active power current is presented.While starting,the DC component of instantaneous active power current was zoomed out,and it was increased gradually to 100%.Then,the PI control of DC side voltage made the DC side voltage stably at the reference voltage.By controlling the rise speed and reference voltage,the overshoot of the supply current after compensating could be suppressed.The simulative and the experimental results show the validity of the proposed starting method.