The causes of harmonic walking-through and the principle of its restraint by APFs are analyzed.

详细分析了谐波穿行现象产生的原因以及APF并列运行抑制谐波穿行的原理；

Like the AP Summary Page, the AP Status Page also gives you direct access to the Alarms list for all APFs.

正如ap汇总页，用户还可以在AP状态页中直接访问所有apf的告警列表。

In this paper, we propose and discuss two new control methods for three phase shunt APFs: the sinusoidal line current control method and the instantaneous reactive power compensation control method.

本论文提出三相并联型有源滤波器的两种新的控制方法，即正弦波化控制和瞬时无功功率的控制方法。