Abstract
In the last decade the increasing presence of harmonic resonance in residential low-voltage (LV) networks was identified in several field measurement campaigns. The major source of these resonances in LV networks is the distributed power electronic (PE) devices, particularly the modern PE-based household equipment. To investigate the effect of such an increasing trend in modern PE household devices, this paper studies the impact of different realistic combinations of common household appliances. These combinations take different evolution stages of PE into account reflecting the past, present and future and load demand at the fundamental frequency. Equivalent circuits derived based on laboratory measurements carried out on typical household load scenarios were used in residential LV network simulation models. Based on the results it can be seen that the increased usage of PE-based devices and replacement of passive household equipment increases the probability of harmonic resonance in residential LV networks.
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