CIM Issues #6274
Remove ACDCTerminal.connected
61970-301, 61970-456
Description
In CIM17 and CIM18 we have clean up the modelling styles and we are forcing models to have ConnectivityNodes
ACDCTerminal.connected in SSH creates a lot of confusion and it requires consistency checks. We have Equipment.inService, we can also go in the direction of using switches. The only case where we could need this is if there are no switches and somebody wants to model open ended branch for multi terminal devices. My recommendation is to recommend modelling a switching device instead of using the .connected attribute.
Proposed Solution
The following changes should be applied:
- Remove ACDCTerminal.connected from SSH.
- deprecate ACDCTerminal.connected in 61970-301.
- add the following text in 301 under a new section
4.6.18 Modelling of open ended branch
This document deprecates the attribute ACDCTerminal.connected as additional attributes were added and modelling concepts aligned. ConductingEquipment-s can be put in service using the attribute Equipment.inService that specifies the availability of the equipment for topology processing, which determines if the equipment is energized or not. Usage of switching equipment is the prefered approach. In order to cover use cases where modelling of open ended branch for pure bus branch models, it is recommended that export at lease one of the switches of the branch so that fault studies or other studies can perform the necessary simulations. Some studies may require modelling a fault is detail and this may require using Cut and Jumper classes to for instance to a model the detail location of the Cut.
- in 456 delete the followng statement and refer to the section 4.6.18 in 301
"Opening of an ACLineSegment end can be made by using the ACDCTerminal.connected flag. In this case a TopologicalNode at the open ACLineSegment end is needed. This is made to describe a fault case."
Decision
The proposed solution was agreed in the call on 15 March 2023.
Release Notes
The following changes were applied:
- Remove ACDCTerminal.connected from SSH profile. The following classes were deleted: ACDCTerminal, DCBaseTerminal, Terminal, DCTerminal, ACDCConverterDCTerminal
- deprecate ACDCTerminal.connected in 61970-301.
- add the following text in 301 under a new section
4.6.18 Modelling of open ended branch
This document deprecates the attribute ACDCTerminal.connected as additional attributes were added and modelling concepts aligned. ConductingEquipment-s can be put in service using the attribute Equipment.inService that specifies the availability of the equipment for topology processing, which determines if the equipment is energized or not. Usage of switching equipment is the prefered approach. In order to cover use cases where modelling of open ended branch for pure bus branch models, it is recommended that export at lease one of the switches of the branch so that fault studies or other studies can perform the necessary simulations. Some studies may require modelling a fault is detail and this may require using Cut and Jumper classes to for instance to a model the detail location of the Cut.
- in 456 delete the followng statement and refer to the section 4.6.18 in 301
"Opening of an ACLineSegment end can be made by using the ACDCTerminal.connected flag. In this case a TopologicalNode at the open ACLineSegment end is needed. This is made to describe a fault case."
Updated by Chavdar Ivanov over 1 year ago
- Status changed from New to Open
- Proposed Solution updated (diff)