This paper presents a simulation for a shunt active
power filter aimed at mitigation of harmonics, power factor
correction and balancing of unbalanced three-phase system. The
system consists of load fed though a six pulse bridge rectifier.
The active power filter consists of a three-phase currentcontrolled
voltage source inverter (CC-VSI) with a filter
inductance at the ac output and a dc-bus capacitor. The CC-VSI
is operated to directly control the ac source current to be
sinusoidal and in phase with the ac source voltage. The inverter
switching is controlled using ramptime current control being
based on the concept of zero average current error (ZACE). The
active power filter reference currents are generated using perfect
harmonic cancellation (PHC) control method. The proposed
filter successfully succeeded in reducing the total harmonic
distortion (THD) to less than unity, correcting power factor to
unity and balancing of unbalanced currents under sinusoidal and
distorted supply voltages. The dynamic performance of the
proposed filter is so fast to meet the dynamic load conditions.