title: High frequency input impedance modeling of low-voltage residential installations - influence on lightning overvoltage simulations results.
abstract: The overvoltage level of a system is strongly dependent on the connected loads and with more precise models, better and more reliable simulation results are obtained. This paper presents the input impedance characteristics, measured over a wide range of frequencies, of various actual low-voltage residential installations. The measured frequency responses were fitted by effective RLC models and a general model was also developed. The range of frequencies considered in the study, nearly d.c. up to 5 MHz, allows the use of these models for lightning or switching studies. It is also presented overvoltage simulations, using different residential installations models presented in the paper, of a distribution network subjected to lightning surges on the medium voltage circuit.
authors.affiliation: Institute of Energy and Environment (IEE), University of São Paulo (USP), Av. Prof. Luciano Gualberto 1289 CEP, 05508-900 São Paulo, SP Brazil.
authors.forename: Welson
authors.initials: W
authors.lastname: Bassi
keywords: Lightning; Low-voltage; Power distribution; Power distribution lines; Power system transients; Surge protection