Modelling of AC/DC Interactions of Converter-Interfaced Resources for Harmonic Power-Flow Studies in Microgrids

Modern power distribution systems experience a large-scale integration of Converter-Interfaced Distributed Energy Resources (CIDERs). As acknowledged by recent literature, the interaction individual CIDER components and different CIDERs through grid can lead to undesirable amplification harmonic frequencies and, ultimately, compromise system stability. In this context, DC AC sides has been shown have significant impact. order analyze support mitigation such phenomena, authors paper recently proposed Harmonic Power-Flow (HPF) framework for polyphase grids with high share CIDERs. The considers coupling between harmonics, but ignores DC-side response Modelling side AC/DC converter introduces nonlinearity into model that needs be approximated numerical solution HPF. This extends HPF address aspect, whose inclusion is non-trivial. extended method applied modified version CIGRÈ low-voltage benchmark microgrid. results are compared (i) time-domain simulations Simulink, (ii) predecessor which neglects side, (iii) classical decoupled