Active Harmonic Filter (AHF) Harmonic Mitigation Working Principles：

1.Real-time detection: Load current is captured through CT transformers;

2.Harmonic extraction: The internal DSP calculates and extracts the harmonic components of the load current;

3.Signal control: PWM signals are generated to drive the IGBT modules;

4.Reverse compensation: The inverter outputs a current equal to and opposite to the harmonics, injecting it into the grid to cancel the harmonics and achieve filtering.