Three-Phrase Active Power Filter Based on DSP for Power Distribution Systems

With the use of nonlinear loads increasing rapidly, which inject undesired harmonic currents into power distribution systems, shunt active power filters (SAF) are being considered as a potential candidate for solving harmonic problems in order to meet harmonic standards and guidelines. This paper presents a new digital signal processor (DSP)-based control method for a three-phase shunt active power filter. Compared to conventional analog-based methods, the DSP-based solution provides a flexible and cheaper method to control the SAF. The proposed control method for determining the reference compensating currents of the three-phase shunt active power Alters based on artificial neural network (ANN) is presented. Finally, the simulation and experimental result also shows that both controller techniques can reduce harmonics in three-phase electric systems drawn by nonlinear loads and reduce hardware components.