基于虚拟健全的有源电力滤波器容错控制

Fault-tolerant Control of Active Power Filter Based on Virtual Health

针对有源电力滤波器(APF)故障,提出一种基于虚拟健全概念的无辅助电路容错控制方法,在所提容错控制方法实现过程中,不需要改变电路拓扑和控制架构,只需要修改参考电流;给出正常运行与容错运行均适用的APF统一控制架构;研究了APF的缺相故障和开关管故障特性,分别给出了对应的容错控制参考电流。通过采用所提APF的缺相故障和开关管故障容错控制方法,电网电流的总谐波畸变率减小,有效改善了电网的电能质量。实验结果验证了该方法的有效性。

Aiming at the fault of active power filter(APF),a fault-tolerant control method without auxiliary circuit based on the concept of virtual health is proposed.The proposed fault-tolerant control method does not need to change the circuit topology and control framework,but only needs to modify the reference current.The uniform control framework of APF for normal operation and fault-tolerant operation is given.The open-phase fault and open-switch fault characteristics of APF are studied,and the reference current under fault-tolerant control are given respectively.By using the proposed the fault-tolerant control method of open-phase fault and open-switch fault of APF,which reduces the total harmonic distortion rate of power grid current,and effectively improves the power quality of power grid.Experimental results verify the effectiveness of this method.