This part of IEC61850, which is a technical report, describes the use of the information model for devices and functions of IEC61850 in applications in substation automation systems, but it may also be used as informative input for the modeling of any other application domain. In particular, it describes the use of compatible logical node names and data objects names for communication between Intelligent Electronic Devices (IED) for use cases. This includes the relationship between Logical Nodes and Data Objects for the given use cases. If needed for the understanding of the use cases, the application of services is also described informatively. If different options cannot be excluded they are also mentioned.
The modelling of the use cases given in this document are based on the class model introduced in IEC61850-7-1 and defined in IEC61850-7-2. The logical node and data names used in this document are defined in IEC61850-7-4 and IEC61850-7-3, the services applied in IEC61850-7-2. The naming conventions of IEC61850-7-2 are also applied in this document.
If extensions are needed in the use cases, the normative naming rules for multiple instances and private, compatible extensions of Logical Node (LN) Classes and Data Object Names defined in IEC61850-7-1 are considered.
IEC61850-7-5 describes in examples the use of logical nodes for modeling application functions and related concepts and guidelines in general, independently from any application domain respectively valid for all application domains in the electric power system (substation automation, distributed energy resources, hydro power, wind power, etc.). This document describes in examples the use of logical nodes for application functions in substation automation including also line protection between substations. It also implies some tutorial material where helpful. However it is recommended to read IEC61850-5 and IEC61850-7-1 in conjunction with IEC61850-7-3 and IEC61850-7-2 first.