Operation of a wye Connected Three-Level Active Power Filter under Non-ideal Conditions

A three-level wye shunt active power filter based on a predictive current controller and line voltage space vector modulation is presented and analyzed. This control scheme treats the non-ideal load as a pure resistive load and compensates the reactive power and harmonics under both ideal and non- ideal conditions, thus the power quality at point of common couplings is improved. Experimental results are presented to demonstrate the effectiveness of this approach, and also reveal the limitation of wye structure APF.