Action of EM Disturbances on the Availability and Range of Indoor PLC Transmitters and Impact of Radiation on the Environment around Channel

Abstract

The use of power lines for transmission of broadband data for applications such as Internet access or home automation, is certainly very attractive, but the problem of electromagnetic interference and radiated caused by these new systems. Risk of interference to radio reception is mainly approached in the frequency band ranging from 1 MHz to 30 MHz allocated to power line communication (PLC) and covers including HF. The experimental study throughout this work show that the coupling factor has a strong dependence relative to the measurement location, to the topology of the electrical network and to a lesser degree, relative to the level of the load impedance. Thus, we made possible an estimate of the radiated field for a known injected signals. Experimental characterization of the indoor measurement also showed that the field values are dispersed; against for outdoor a proportional decrease relative to the distance can be observed. The different results permit to deduct a few orders of magnitude as well as some simple rules of use for minimizing exposure while allowing normal operation of the application level. In all cases, measured or simulated covered by the study, the required levels are met. In situ measurements show that human exposure to the electric field radiated by the PLC network is very small (< 1 V/m) compared to the reference limits.