Carrier in Distribution Management System/Dispatch Automation

In distribution management system dispatch automation system,the communication is one of the most important and difficult problems.The rationality of the communication system has direct effect on the actualization of DMS/DA.It introduces the application of distribution line carrier(DLC)and compares it with power line carrier(PLC).The main factors that have effects on the DLC are analyzed.The methods to improve the DLC qualities are discussed here.It is simply advised how to connect DLC with other communication system in DMS/DA.There exist many difficulties of this technology in DLC,but it can be well used widely in the DMS/DA.