Simplicity and Performance of Direct Current Control DCC Compared with other Identification Algorithms for Shunt Active Power Filter

In recent years, the shunt active power filter SAPF has received much attention with many control techniques and identification algorithms for compensating the current harmonic pollution. The quality of current harmonics compensation depends heavily on the performance of the chosen algorithm of identification. This paper compares several current generation algorithms for a 3-phase hysteresis inverters used as SAPF. The direct current control algorithm DCC, the classical direct power control DPC and the synchronous reference frame algorithm SRF are used to generate the appropriate harmonic currents. The simulation results show an excellent behaviour of the system with a DCC algorithm in the case of balanced network and non-linear loads based on three-phase bridge rectifier with diodes and (R-L) load. The proposed SAPF with DCC algorithm achieved a very low value of total harmonic distortion THD
_i
and the system was in perfect compliance with harmonic limits per IEEE std 519-1992, the THD of current decreases from 28 % without SAPF to 1.47 % with a simple DCC algorithm.