Abstract: In order to dynamically adapt to the changes in power line environment, communicate effectively and reliably and meet the increasing demand for power line carrier communications, an automatic relay distribution line carrier communication method is developed to improve the existing artificial fixed relay based on statistics. The algorithm process and detailed procedures are presented. By virtue of Matlab the algorithm process is simulated through an example. The simulation analysis is carried out with the information of each relay path provided. The signal-to-noise ratio of all paths is compared and a diagram of different optimal path simulation is also drawn. The simulation results show that the algorithm is easy to be implemented, and the automatic relay could be achieved effectively.

Key words: distribution automation, power line communication, automatic relay, statistics, optimal relay path