Interactive PV-Shunt Active Power Filter based on Impedance Source Inverter Controlled by SRF-MVF

This paper deals with an interactive three-phase shunt active power filter (SAPF) connected to a Photovoltaic (PV) source through a Z-source inverter (ZSI). The filter is controlled by synchronous reference frame (SRF) controller based on Multi-variable filter (MVF). The proposed system is designed to reduce the total harmonic distortion (THD) of the source current. In addition, the filter utilizes the PV source to inject active power into the grid as an additional support. The proposed system has been validated through extensive real-time simulation carried out using OPAL-RT-5600 under several scenarios. The conducted investigations are aimed to demonstrate the good performance of the filter in terms of harmonic elimination, operating under weak grid conditions, and injecting active power to the grid.