Resumo:
This work comes with the propose of investigating a combined system composed by
two active series filters and a shunt passive filter operating under distorted and
unbalanced load conditions which are applied to a three phase - four wire system.
The control and the power systems main aspects are investigated to the combined
system elaboration based on Synchronous Reference Frame controllers. Added to this,
the combined system performance is investigated and presented. The control issues have
been widely investigated once it exhibits a good dynamic performance, simple
implementation work and a satisfied cost- effectiveness relationship.
The literature had already proposed a lot of applications related to the combined
system based on SRF controllers. However the existent applications are limited to
balanced load conditions and three phase - three wire power systems.
The aim of this work is to investigate the performance of the combined system
under unbalanced conditions for a three phase – four wire power system and essentially
to propose a solution that viability the combined system under unbalanced condition
application when it is performed in the synchronous reference frame to the heaviest load
conditions and then follows the actual standards recommendations.
