A Detailed Simulation Model of Residential LV Networks for Harmonic Resonance Studies

Harmonic resonance is increasingly observed in many European residential low-voltage networks, warranting its characterization and detection. Various simulation models of such networks were developed to perform harmonic studies, but they are not optimized to represent the varying harmonic resonance characteristics and the parameters it affects. To bridge this gap, a detailed simulation model in the frequency domain is proposed in this paper. The model represents the low-voltage network including its residential customers. One of the novel contributions of this paper is the realistic modeling of customer-side harmonic impedance. Equivalent circuits of various time-dependent combinations of household devices are derived, which were identified based on customer behavior. The simulation model is validated against measurements obtained from German low-voltage networks for their representativeness. An application example is provided to highlight the usefulness of the proposed model.