Transmissão de dados através da rede elétrica.

Abstract

The presented work presents the implementation of a communication system device based on the technology Powerline Communication. This kind of technology uses the existing electric system network to perform the data transmission and can be used to residential automation. Studies shows that this technology promises increase the data-communication baud to the final user applications. Another very excellent characteristic is the capillarity distribution that the system can achieve. Today according to ANEEL (National Agency of Electric Energy) data from 47 million consumers, 85%of this amount is residential and are distributed in over 99% of the Brazilian cities. This work presents the used methodology of research and development of a communication system used for transmitting data using the low voltage power system network. The system is composed of a transmitter circuit connected to a personal computer and it is connected in the electric system using a magnetic coupler, this device sends the data to the receiver and other devices that can be controlled. The developed system is based on special integrated circuits that conditioning and adjust the signals received from the power network with the defined modulation method, and magnetic couplers circuits performed the isolation between the equipment and the 220 V network voltage. In the work, the characteristics of communication channel are discussed (low power voltage network), since this has fundamental importance in the data reception and the system efficiency, as well as the existing methods of digital signal modulation.