滑模控制在有源电力滤波器直流侧中的应用

Application of Sliding Mode Control in the DC Side of Active Power Filter

直流侧电压的稳定对并联型有源电力滤波器(APF)的性能起着非常重要的作用。针对传统PI控制存在着电压超调大和抗干扰能力弱等问题,设计用于三线制并联型APF的滑模变结构控制器。仿真结果表明,该滑模控制器能实现软启动并有效地提高了三电平并联型APF直流侧电压控制的鲁棒性以及稳定性。

The voltage of the DC side plays a very important role in the active power filter(APF)′s performance.In view of the disadvantages which exist in the DC side using PI control when active power filter starts up,such as the voltage overshoot,current shock and the voltage fluctuation when load change.Design a sliding mode contraller for three-level APF.The simulation results show that the active power filter at startup by using this method can make the DC-side voltage steadily rise to reference,the starting current is no impact and the system has strong robustness.