Scope
This part of IEC 61850, which is a Technical Specification, describes the use of the information model for devices and functions of IEC 61850 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 Object 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 IEC 61850-7-1 and defined in IEC 61850-7-2. The Logical Node and Data Object names used in this document are defined in IEC 61850-7-4 and associated documents (work in progress) and IEC 61850-7-3, the services applied in IEC 61850-7-2. The naming conventions of IEC 61850-7-2 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 classes and Data Object names defined in IEC 61850-7-1 are considered. IEC 61850-1-2 is also used to guide extensions required by this document. Extensions to any Logical Node classes are defined in IEC 61850-90-25.
IEC 61850-7-5 describes example uses of Logical Nodes for modeling application functions and related concepts. It also generally describes guidelines independently from any application domain and is valid for all application domains in the electric power system (substation automation, distributed energy resources, hydro power, wind power, etc.). This document describes example uses of Logical Nodes for application functions in substation automation, including line protection between substations. It also includes some tutorial material, where helpful. However, it is recommended to read IEC 61850- 5 and IEC 61850-7-1 in conjunction with IEC 61850-7-3 and IEC 61850-7-2 first.
Purpose
IEC has updated their guidelines for Technical Reports, stating these documents can no longer contain “Shall” or “Should”. Edition 1 of Technical Report IEC 61850-7-500 contains these words. We are updating part 7-500 and therefore need to address this issue. The proposal is to convert part 7-500 into a Technical Specification maintaining the reference number. Per the approved Questionnaire 57/2715/Q this work has been agreed upon. This Technical Specification will not include any models. Models will be hosted in the new PAS 61850-90-25. Topics to be included in the next edition of part 7-500 include, but are not limited to:
• Corrections for errors in the previous edition
• Clarification on the usage of SwModKey
• Introduction of a new logical node class (RFMX) for fault-related measurements
• Introduction of the concept of topology modelling
• Enhancement of the circuit breaker model to support withdrawable circuit breakers
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