Assessment of Supraharmonic Emissions of Parallel Grid Connected Inverters Using Symmetric Carrier Phase Shift Concept

This paper presents an experimental study on the high frequency emissions in supraharmonic (SH) range of grid connected inverters (GCIs) under symmetric carrier phase shift concept. The aim of the study is to show the advantages and the limitations of using the carrier phase shift concept for parallel connected GCIs in distributed power generation systems. The experimental study is done with a dSPACE MicroLabBox based system of two GCIs under two symmetric and asymmetric scenarios.