Slot: rbb¶

Resistance matrix element R_bb 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 raa is read and applied to the whole segment/end; see the raa comment). Export: rbb = PhaseImpedanceData(row=2,col=2).r × length / z_base when available, or the same fallback ACLineSegment.r / z_base value as raa/rcc otherwise. For switches, rbb is a fixed small epsilon (1e-8 / z_base) representing near-zero impedance, equal across all three diagonal terms.

Identifier and Mapping Information¶

Annotations¶

property	value
order	8
value_type	float
precision	16
separator	,

Schema Source¶

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

Mappings¶

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

LinkML Source¶

name: rbb
annotations:
  order:
    tag: order
    value: 8
  value_type:
    tag: value_type
    value: float
  precision:
    tag: precision
    value: 16
  separator:
    tag: separator
    value: ','
description: Resistance matrix element R_bb in per-unit (base z_base).
comments:
- 'Not used on import (only raa is read and applied to the whole segment/end; see
  the raa comment). Export: rbb = PhaseImpedanceData(row=2,col=2).r × length / z_base
  when available, or the same fallback ACLineSegment.r / z_base value as raa/rcc otherwise.
  For switches, rbb is a fixed small epsilon (1e-8 / z_base) representing near-zero
  impedance, equal across all three diagonal terms.'
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