Analysis and Simulation of Active Filter in Distribution Network with Nonlinear and Asymmetrical Load

Active filters are power electronics that are effective in limiting harmonics. The article presents the design and simulation of an active filter using the classical control structure PI combined with the instantaneous power theory of Akagi to detect harmonics and inject into the grid the harmonics that are similar but reverse for the purpose of mitigating harmonics. The effectiveness of the method was verified through simulation by Matlab/Simulink software for variable load in three cases. The results show that in all three cases, not only the harmonics are limited to meet IEEE 519 standards, but the active filter also balances the phase current in the case of asymmetrical loads.