An Advanced Control Approach for a Shunt Active Power Filter

Abstract

This paper deals with the design, analysis and simulation of a three phase three wire shunt active power filter. It compensates harmonic currents, and reactive power under balanced and unbalanced supply network. An advanced control theory based on a self tuning filter is adopted. The novelty with the control approach developed in this paper is to use a self tuning filter, which can extract directly the fundamental currents in the αβ axis with high performance. It will be proved that the new approach has a good dynamic and without any delay. Moreover, we are going to propose a PLL with a high performances when the voltages of the main are strongly unbalanced and contain harmonics. The simulation results will illustrate the good performance of this new approach, specially a better dynamic characteristics in comparison with classical extraction methods will be obtained. Finally an experimental branch for testing practically this new control approach is undergoing now and hopefully the experimental results will be presented during the conference.