Currents' physical components theory implementation in shunt active power filtering for unbalanced loads

This paper is focused on the implementation of the Currents' Physical Components power theory in the control of a three-phase three wire shunt active power filtering system. Various compensation objectives are taken into consideration by using the provided orthogonal decomposition of the load current associated to the power phenomena. The control algorithms were implemented through the dSPACE DS1103 controller board for modern rapid prototyping which is fully programmable from the Simulink block diagram environment. Three types of unbalanced loads were taken into consideration in the experimental investigations in order to be compensated, namely an AC voltage controller, an unbalanced fully-controlled bridge rectifier and a transformer with unbalanced resistive load. The active filtering performance, in terms of harmonic distortion factor, unbalance factor, global power factor and displacement power factor, are analysed for each laboratory test. The experimental results prove that the control algorithm implementation on the developed dSPACE platform enables achieving all compensation objectives.