The JN-APF active filtering device is a new generation of harmonic management solution for dynamic harmonic filtering. It adopts advanced dynamic real-time tracking and compensation methods to eliminate grid harmonics. By monitoring the current waveform generated by nonlinear loads in real-time, the harmonic part is separated, and equal and opposite harmonic currents are injected into the grid to achieve the function of harmonic filtering. All technical performance indicators have reached the same level as similar products at home and abroad, with revolutionary breakthroughs in cost and technology. The new process design greatly reduces the machine volume, saves valuable space in the computer room, and greatly reduces the threshold for enterprise users to use active filter technology.