Research on Harmonic Management of Single-Phase AC Charging Pile Based on Active Filtering

Nowadays, AC charging piles are widely used, and with the increasing number of piles, harmonic pollution generated by them becomes more serious affects power quality grid. Aiming at problem control single-phase pile, it is decided to apply active filter technology. The parallel (PAPF) selected according characteristics pile. single detection method studied based on instantaneous reactive theory, a new adaptive low-pass fixed-step size proposed improve performance combining least mean square (LMS) fourth-order moment (LMF) algorithms. PAPF part adopts composite strategy inner outer loop combined repetitive complete voltage stabilization control, tracking, compensation. Based MATLAB/SIMULINK, output waveforms link simulated analyzed, prototype experiment carried out. results verify that algorithm can detection. Finally, system simulation established compensation capability analyzed Fast Fourier Transform (FFT). demonstrate effectively manage harmonics total distortion (THD) reduced less than 5%.