Besides conventional solutions such as passive filters and changed system configurations to harmonic problems, the use of active power filters (APF) to eliminate harmonic currents injected by nonlinear loads has attracted much attention.

• 除了传统的滤波方法,例如,无源滤波、改变系统的拓补结构来抑制谐波外,人们已广泛应用有源滤波器(APF)来消除注入电网的谐波。