This section is only valid when the IEC 61850 standard is used for station bus communication. The IEC 61850 naming conventions to identify an IED are only valid when the IEC 61850 standard is used for station bus communication. According to the IEC 61850-6, the SCL model allows two kinds of project designations in the object properties: a technical key and a user-oriented textual designation.
- Technical key is used in engineering drawings and for signal identifications. This is contained in the attribute name as an identification of each object. If the value is used as a reference to an object, it is contained in an attribute name starting with a string denoting the reference target object type and ending with the string Name. The technical key is used within SCL for referencing to other objects. The name is a relative identification within a hierarchy of objects. The maximum characters allowed for a technical key is 28 for IEC 61850 Edition 1 and 60 for Edition 2 projects.
- User-oriented textual designation is contained in the desc attribute. Attributes are not allowed to contain carriage return, line feed, tab, greater than, less than, double quotes or ampersand characters. The semantics of desc must also be relative within an object hierarchy. The maximum length is 100.
PCM600 takes care of these two possibilities. The two possible signal designations are available per object in the Object Properties for all the hierarchical levels beginning with the station as the highest level.
The technical key is automatically generated based on the rules and type specifications of IEC 61346 and the extended definitions assigned for substations by a technical committee. The technical key is shown in the Object Properties dialog box under SCL Technical Key or Technical Key.
- The station is predefined by “AA1" where 1 is the index. To get the real station name that is used, it is possible to rename the SCL Technical Key for the station as the name used by the project. To minimize the word length, a short form should be used, because this name is used also in the transmitted messages to identify the events, for example.
- The voltage level. In the example it is 20 kV and J1 is selected from the list below SCL Technical Key in the Object Properties dialog box.
- The bay and the IED are appended with the coding defined in the IEC 61346 standard and the substation definition lists. In the example, the Bay SCL Technical Key part is Q03 and IED is A1.
The user-oriented textual designation is visible in the Plant structure view for each object. It is the name given by default or changed by using the Rename function.
The created technical key for the full path name of the IED would be: AA1J1Q03A1.
- AA1 = substation in the project
- J1 = voltage level from 20 to 30 kV
- Q03 = the third bay in the voltage level
- A1 = first IED in the bay Q03