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CIM Issues #5299

ACLineSegment updates for mutual coupling

Added by Pat Brown about 2 years ago. Updated 6 months ago.

Status:
Closed
Priority:
Normal
Author/Contact Info:
Tom McDermott
Base Release:
Solution to be Applied To:
CIM18v07
Solution Version:
CIM18v07
Solution Applied By:
Chavdar Ivanov
Completion Date:
10/08/2023
CIM Keywords:
61970-Wires
Breaking Change:
No
Breaking Change Description:
but at some point in the future, the MutualCoupling class could be considered for deprecation
CIM Impacted Groups:
WG13
Requestor:
Pat Brown
Standard(s):

61970-301, 61968-13

Version:
Clause:
Sub-Clause:
Paragraph:
Table:
Originally Closed in Version:
Origination Date:
Origination ID:
Originally Assigned To:
Yang Feng

Description

The current mechanism for describing coupled lines (lines in sufficiently close proximity to each other to induce mutual impedances) does not support unbalanced modeling.

Files

2022-01-30 Device Datasheet ACLineSegment coupling UML proposal.docx 2022-01-30 Device Datasheet ACLineSegment coupling UML proposal.docx 1.2 MB Pat Brown, 01/30/2022 04:05 AM

Proposed Solution

A physical modeling approach (leveraging WireAssembly and related classes) will allow accurate unbalanced mutual modeling to be done with the results stored in a phase impedance matrix described by the PerLengthPhaseImpedance class. Balanced modeling of mutual impedances can be derived from the phase impedance matrix.
To implement this approach, modeling needs to allow the identification of a group of line segments that are coupled. Two new classes are proposed that support such grouping: CoupledLineSegmentGroup and LineSegmentCoupling.

Decision

09/22/2022- WG approves and updates to the 301 are required. Recommend Tom McDermott, Kurt Hunter as reviewers.

13 June 2023, Oslo - Apply UML changes

Release Notes

Wires package updated with
Add class LineSegmentCoupling, a child of IdentifiedObject
with attributes
.coupledLineNumber
.reverseFlow
.xOffset
Add class CoupledLineSegmentGroup, a child of IdentifiedObject
with no attributes
Add association LineSegmentCoupling.ACLineSegment
Add association LineSegmentCoupling.CoupledLineSegmentGroup

These changes are also applied in 452 SC profile where the following attributes are set to required

.coupledLineNumber
.reverseFlow
.xOffset

MutualCoupling class is set to deprecated in wires package and in 452 SC profile.

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