Slot: rab¶

Resistance matrix element R_ab in per-unit (base z_base).

Applicable Classes¶

Name	Description	Modifies Slot
BranchRecord	Branch data record for DistOPF	no

Properties¶

Type and Range¶

Property	Value
Range	Float
Domain Of	BranchRecord

Cardinality and Requirements¶

Property	Value
### Slot Characteristics

Property	Value
If Absent	`float(0.0)`
Owner	BranchRecord

Additional Constraints

**Unit:** | Property | Value | | --- | --- | | ucum_code | pu |

Comments¶

Not used on import (only the diagonal raa is read; see the raa comment). Export: rab = PhaseImpedanceData(row=2,col=1).r × length / z_base when a PerLengthPhaseImpedance with PhaseImpedanceData is present; otherwise left at zero (the direct ACLineSegment.r/x fallback only populates the diagonal).

TODOs¶

Import never populates off-diagonal mutual-coupling terms — a PerLengthPhaseImpedance is not constructed from rab/rac/rbc, so phase coupling is lost on import even when the source CSV provides it.

Identifier and Mapping Information¶

Annotations¶

property	value
order	6
value_type	float
precision	16
separator	,

Schema Source¶

from schema: https://gridappsd.org/cimhub/distopf

Mappings¶

Mapping Type	Mapped Value
self	distopf:rab
native	distopf:rab
related	cim:PerLengthPhaseImpedanceData.r

LinkML Source¶

name: rab
annotations:
  order:
    tag: order
    value: 6
  value_type:
    tag: value_type
    value: float
  precision:
    tag: precision
    value: 16
  separator:
    tag: separator
    value: ','
description: Resistance matrix element R_ab in per-unit (base z_base).
todos:
- Import never populates off-diagonal mutual-coupling terms — a PerLengthPhaseImpedance
  is not constructed from rab/rac/rbc, so phase coupling is lost on import even when
  the source CSV provides it.
comments:
- 'Not used on import (only the diagonal raa is read; see the raa comment). Export:
  rab = PhaseImpedanceData(row=2,col=1).r × length / z_base when a PerLengthPhaseImpedance
  with PhaseImpedanceData is present; otherwise left at zero (the direct ACLineSegment.r/x
  fallback only populates the diagonal).'
from_schema: https://gridappsd.org/cimhub/distopf
related_mappings:
- cim:PerLengthPhaseImpedanceData.r
rank: 1000
ifabsent: float(0.0)
owner: BranchRecord
domain_of:
- BranchRecord
range: float
required: false
unit:
  ucum_code: pu