Résumé:
In This paper, we present an experimental study of feedback Linearization applied
to regulate the DC bus voltage of three-phase shunt Active Power Filter (APF). The
feedback linearization controller is introduced to improve tracking performance
characteristics, power quality and minimized consumption of the reactive power. To
identify the reference currents we used an algorithm based on the Self Tuning Filter
(STF). We generate the firing pulses of the IGBT inverter by using a hysteresis
current controller, which is implemented on an analog card..An experimental bench
has been implemented. It consists an active filter parallel to IGBTs, a nonlinear a
load RL, a dSPACE digital prototyping system (DS1104 development board) for
generating the references of the harmonic currents and an analog card to realize the
control of harmonic currents by hysteresis. The experimental results under steady
state and transient conditions is illustrated with signal-flow graphs and
corresponding analysis show the feasibility and the effectiveness of the designed
active filter, associated with feedback Linearization controller capability in meeting
the IEEE 519-1992 recommended harmonic standard limits.