PV based Shunt Active Power Filter for harmonics mitigation using Decoupled DSRF theory

A PV based Shunt Active Power Filter (SAPF) with a DC-DC boost converter is proposed for the improvement of power quality, i.e., lessening current harmonics using Decoupled Double Synchronous Reference Frame (DDSRF) theory in this paper. DDSRF theory has the capability to extract the sequence components of currents when the loads are unbalanced and nonlinear, and eliminate double frequency oscillations created by injecting positive and negative-sequence currents. A three level Voltage Source Converter (VSC) configuration is used for SAPF realization which will provide compensation at Point of Common Coupling (PCC). The DC capacitor voltage is maintained constant with the aid of a battery connected to a PV panel, controlled by incremental conductance method algorithm. The simulation work has been performed for non linear load and the performance of the proposed theory is confirmed with the simulation results.