Series Active Filter Control with A Novel Load Voltage Harmonic Extraction Method

Series Active Filters (SAF) are designed for harmonic isolation and load voltage regulation of singlephase and three-phase voltage harmonic source type nonlinear loads. The novel Absolute Value Method (AVM) for load voltage harmonic extraction is proposed and applied in the control algorithm of SAF. Harmonic isolation and load voltage regulation performances of 2.5 kW single-phase and 10 kW three-phase SAF compensated systems are evaluated by detailed simulations. Via simulations it is shown that AVM yields superior harmonic isolation and load voltage regulation performance compared to the conventional low/high pass filtering method. Theory, and simulations are well correlated and illustrate the feasibility of the proposed method.