Slot: raa¶

Resistance matrix element R_aa 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¶

Import: for lines, ACLineSegment.r = raa × z_base (per-unit to ohms; raa is the only diagonal term read, and is applied as the segment's single r, not a per-phase value). For transformers, the same raa × z_base is written to PowerTransformerEnd.r on end 1 only. Export: for lines, raa = PhaseImpedanceData(row=1,col=1).r × length / z_base when a PerLengthPhaseImpedance with PhaseImpedanceData is present; otherwise raa falls back to ACLineSegment.r / z_base (also copied into rbb/rcc). For switches and transformers, raa is a synthesized value (see the rbb/rcc and class-level comments), not a genuine per-phase resistance.

Identifier and Mapping Information¶

Annotations¶

property	value
order	5
value_type	float
precision	16
separator	,

Schema Source¶

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

Mappings¶

Mapping Type	Mapped Value
self	distopf:raa
native	distopf:raa
close	cim:ACLineSegment.r, cim:PerLengthPhaseImpedanceData.r

LinkML Source¶

name: raa
annotations:
  order:
    tag: order
    value: 5
  value_type:
    tag: value_type
    value: float
  precision:
    tag: precision
    value: 16
  separator:
    tag: separator
    value: ','
description: Resistance matrix element R_aa in per-unit (base z_base).
comments:
- 'Import: for lines, ACLineSegment.r = raa × z_base (per-unit to ohms; raa is the
  only diagonal term read, and is applied as the segment''s single r, not a per-phase
  value). For transformers, the same raa × z_base is written to PowerTransformerEnd.r
  on end 1 only. Export: for lines, raa = PhaseImpedanceData(row=1,col=1).r × length
  / z_base when a PerLengthPhaseImpedance with PhaseImpedanceData is present; otherwise
  raa falls back to ACLineSegment.r / z_base (also copied into rbb/rcc). For switches
  and transformers, raa is a synthesized value (see the rbb/rcc and class-level comments),
  not a genuine per-phase resistance.'
from_schema: https://gridappsd.org/cimhub/distopf
close_mappings:
- cim:ACLineSegment.r
- cim:PerLengthPhaseImpedanceData.r
rank: 1000
ifabsent: float(0.0)
owner: BranchRecord
domain_of:
- BranchRecord
range: float
required: false
unit:
  ucum_code: pu