CIM Issues #5053
Add explanatory text to show the differences between BusbarSection and Junction
Description
IEC TS 62361-102 Recommendation R4:
The CIM has two classes called BusbarSection and Junction which have similar attributes and associations. From a topology processing point of view clearly the two classes are equivalent.
In addition, ConnectivityNodes can be defined with or without associations to instances of these classes.
IEC 61970-301 does not give clear guidance on when it would be appropriate for ConnectivityNodes to be associated with BusbarSections, Junctions or neither.
This makes it difficult to define rules for automatic conversion from IEC 61850 SCL files.
Proposed Solution
WG19 IEC TS 62361-102:2018 proposed changes:
Add explanatory text to show the differences between BusbarSection and Junction.
"The BusbarSection class is intended to represent physical parts of bus bars no matter how that bus bar is constructed.
The Junction class is intended to provide a place to associate additional information to a connectivity node which connects two or more equipment terminals. Examples include a tee-point or the connection point between two switches.
Typically, BusbarSections and Junctions are represented by different symbols on diagrams."
Decision
Review by WG13 on 19-Feb-2020 resulted in consensus on the following set of changes:
Apply the agreed upon descriptions to the following areas in the CIM:
. Include paragraphs 1 and 3 in the BusbarSection description.
. Include paragraphs 2 and 3 in the Junction description.
. Include all paragraphs within Section 4.5.4 in the Connectivity Model. (Svein proposed and mutually agreed upon)
Release Notes
Per an IEC 61850 harmonization recommendation (Recommendation R4) the CIM classes BusbarSection and Junction descriptions were updated. From a topology processing point of view the two classes are equivalent. In addition, ConnectivityNodes can be defined with or without associations to instances of these classes. IEC 61970-301 does not give clear guidance on when it would be appropriate for ConnectivityNodes to be associated with BusbarSections , Junctions or neither. This makes it difficult to define rules for automatic conversion from IEC 61850 SCL files. Section 4.5.4 in the standard has also been updated to better clarify.
Updated by Todd Viegut over 2 years ago
- Subject changed from IEC TS 62361-102 Recommendation R4: The CIM has two classe to Add explanatory text to show the differences between BusbarSection and Junction
- Author/Contact Info changed from IEC TS 62361-102:2018 to Tom Berry
- Solution Version changed from CIM18 to CIM18v00
- Solution Applied By changed from tviegut to Todd Viegut
- Proposed Solution updated (diff)
- Decision updated (diff)
Updated by Todd Viegut over 2 years ago
- Solution to be Applied To changed from 61970cim18 to CIM18