A DSP-based Active Power Filter for Three-phase Power Distribution Systems

This paper presents a new digital signal processor (DSP)-based control method for shunt active power filter (SAF) for three-phase power distribution systems. Compared to conventional analog-based methods, the DSP-based solution provides a flexible and cheaper method to control the SAF. The proposed technique requires fewer current sensors than other solutions which require both the source current and the load current information. Furthermore, the proposed technique provides both harmonic elimination and power factor correction. 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.