有源电力滤波器，采用滞环控制方法以，直流侧电压为530V，最终波形显示很好 -Active power filter, a control method with hysteresis, DC voltage is 530V, the resulting waveform display good

有源滤波器，低通滤波器检测谐波，加直流电源抵消谐波，效果较好，滑模控制方式(Active filter, low-pass filter to detect harmonics, plus DC power supply to cancel harmonics, better effect, sliding mode control)