Harmonic compensation using residential PV interfacing inverter

The increased number of nonlinear residential loads in today´s typical home and power electronics based distributed generation (DG) systems is a growing concern for the utility companies due to the power quality issues. However, properly controlled DG-grid interfacing converters are able to improve the distribution system power quality. Thus increased number of DG systems can effectively be utilized to address the power quality concern raised by increased nonlinear residential loads. This paper is mainly focused on the distribution system harmonic control through the DG-grid interfacing converters. An in-depth analysis and comparison of different compensation schemes based on the virtual harmonic impedance concept are carried out. The analysis results are verified by simulation of a test residential distribution system.