Modélisation et caractérisation du canal de transmission CPL sur le réseau électrique domestique

Abstract

In this paper, a novel approach allowing modeling the transfer function of electrical power lines for broadband PLC is presented. The power line is approximated as a two wire transmission. The characteristic impedance and the constant propagation of the used cable are derived from a circuit lumped-element model. Using these parameters, the LV network is regarded as an M nodes and N branches, which is subdivided into several cascaded basic networks. The channel transfer function is later obtained by using a systematic application of four-pole-theory and combining easily the T-matrices of the cascaded sub networks (the chain matrix method). Different investigations with regard to network load impedances, branches length and number of branches has been evaluated. The impedance of realistic households loads are also measured and their influence on the transfer function of indoor channel is analyzed. Finally, this paper presents an experimental validation of the model based on the deterministic approach.