A three-phase hybrid active power filter with photovoltaic generation and hysteresis current control

This paper presents a new three-phase hybrid active power filter configuration that interconnects a passive high-pass filter in parallel with an active power filter and a photovoltaic system. The proposed configuration improves the filtering performance of the conventional active power filter, as well as simultaneously supplies the power from the photovoltaic arrays to the loads and utilities. Furthermore, the derivation of the compensation current reference is simplified with the utilization of the extended p-q theory. This paper will describe the proposed hybrid active power filter with photovoltaic system. It will primarily focus on the power circuit, control system and the compensation current reference derivation. The proposed system effectively filters harmonics under 1 kHz but also higher frequencies to achieve a wideband harmonics compensation. The THD of the source current is reduced from 30.09 % to 1.95 %. Simulation results that verify the theoretical predictions of the proposed configuration are presented.