Research Of Line Protection Device Based On IEC61850

With the formal promulgation of the standard IEC61850 and the constant digital substation commissioning, the research on the new digital protection device has become a must. In this thesis, the subject investigated is the substation application of new digital line protection device complied with IEC61850 standard. And a further research on the modeling of IED protection and implementation is also carried out.Firstly, the thesis analyses the architecture of the standard IEC61850, focus on the digital substation based on IEC61850 hierarchical structure and the substation IED communication configuration description language, basic communication structure for substation and feeder equipment, and specific communication service mapping(SCSM) - Mapping to MMS.Secondly, the thesis summarizes the standard IEC61850-based IED modeling steps and engineering modeling, modeling of line spacing IED substation configuration description language. And it creates the line spacing to the configuration file IED based on the structure and syntax.Again, the paper simulates the data output function of the merging unit, the current and voltage value by simulation of fault line is sent to line protection device as the data source to protection task of line protection device, then the software design is completed and the realization of data output is verified by the WireShark message analysis software.Finally, the analysis of line protection devices and the design of the software technology solutions, combined with MMS-EASE-LITE package, completed line protection device software design which was in line with IEC61850 standard, and was verified the function of software by debug tools.