The Application Of IEC 61850 In The Relaying Protection And Fault Information System

IEC 61850 is the newest national standard about communications network and system in substations, and it is the best way to realize communications within and between substations without barricades. The structure and functions of the relaying protection and fault information system for power network and the necessity of applying IEC 61850 are presented in this paper first, then the origination, system, destinations and characteristic of IEC 61850 are presented, and the methods and steps of modeling an IED device according to IEC 61850 are emphasized. Then I took a real protection device as an example, tried to model the main function CPUs according to IEC 61850 by the steps of logical node and data object modeling, logical device modeling and communition service modeling. The prospects of this standard are put forward in the end of this paper.