Application of Backstepping to the Virtual Flux Oriented Control for Three- Phase Shunt Active Power Filter

Abstract

The present paper proposes to combine the virtual flux oriented control with backstepping control to increase the filtering performance of three-phase shunt active power filter. This work is motivated by the limited ability of the conventional controller to perform effectively the dynamic performance of active filter when load variations or line voltage distortions are considered. The resulting control system based on backstepping approach is aimed to compensate reactive power and harmonic distortion, operate at unit power factor and maintain the DC voltage at the desired level. Computer simulations are presented to confirm the performance and effectiveness of the proposed control strategy.