Short-circuit modeling of three-phase 4-wire unbalanced networks in presence of single-phase photovoltaic systems

•Short-circuit analysis of distribution networks with photovoltaic generation.•Photovoltaic systems must operate in low-voltage ride through to support networks.•Three control strategies are considered for the active and reactive power injection.•Extensive numerical experiments are based on a test benchmark distribution network.•Results quantify the contribution to short-circuit currents and the network support.