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CIM Mapping

Below is an overview of the mapping done between IEC CIM Classes and IEC 61850 Classes and their properties.
There is an IEC document describing the mapping, namely IEC/TS 62361-102, but not all details are in there.

Mapping IEC CIM to IEC 61850

Remark: In CIM the name is optional, so when the name is not there the ID is used. This is the case for many entities described below (name or id).

CIM Class IEC Class Required Remark
cim:Substation TSubstation -
id name Yes
name desc No
List<cim:VoltageLevel> List<TVoltageLevel> - (1)
List<cim:PowerTransformer> List<TPowerTransformer> -

(1): The list of VoltageLevels that belong to the Substation.

CIM Class IEC Class Required Remark
cim:VoltageLevel TVoltageLevel -
name or id name Yes
'0' nomFreq - (1)
nominalV voltage.value No
'k' voltage.multiplier -
'V' voltage.unit -
List<cim:Bay> List<TBay> - (2)
List<cim:PowerTransformer> List<TPowerTransformer> -

(1): The nomFreq will be set to 0 if there is a Switch connected to it of the type 'DCLineSegment'.
(2): The list of Bays that belong to the VoltageLevel.

CIM Class IEC Class Required Remark
cim:BusbarSection TBay -
name or id name Yes
List<cim:ConnectivityNode> List<TConnectivityNode> - (1)

(1): The ConnectivityNodes that are linked to the BusbarSection through a Terminal of the BusbarSection.

CIM Class IEC Class Required Remark
cim:Bay TBay -
name or id name Yes
List<cim:ConnectivityNode> List<TConnectivityNode> - (1)
List<Switches> List<TConductingEquipment> - (2)
List<cim:PowerTransformer> List<TPowerTransformer> -

(1): The ConnectivityNodes that are linked to the Bay thought the terminals of the switches of the Bay.
(2): Switches in IEC CIM can be the following types, cim:Switch, cim:Breaker, cim:Disconnector, cim:LoadBreakSwitch and cim:ProtectedSwitch. These classes are all mapped in the same way on IEC 61850

CIM Class IEC Class Required Remark
cim:PowerTransformer TPowerTransformer -
name or id name Yes
description desc No
'PTR' type -
List<cim:PowerTransformerEnd> List<TTransformerWinding> -
CIM Class IEC Class Required Remark
cim:PowerTransformerEnd TTransformerWinding -
name or id (PowerTransformer) +
'_' + endNumber name Yes
'PTW' type -
cim:RatioTapChanger or
cim:PhaseTapChanger tapChanger -
Terminal List<TTerminal> - (1)

(1): The terminal found in IEC CIM will be added as List to IEC 61850.

CIM Class IEC Class Required Remark
cim:RatioTapChanger or
cim:PhaseTapChanger TTapChanger -
name or id name Yes
'LTC' type -
CIM Class IEC Class Required Remark
cim:ConnectivityNode TConnectivityNode -
name or id name Yes
- pathName - (1)

(1): The path name is derived from the names of all parent of that ConnectivityNode. In the context we keep a list of all Naming Elements we passed before coming to that ConnectivityNode. In this way we can build the PathName of that ConnectivityNode.

CIM Class IEC Class Required Remark
Switches TConductingEquipment - (1)
name or id name Yes
type type Yes (2)
List<cim:Terminal> List<TTerminal> - (3)

(1): Switches in IEC CIM can be the following types, cim:Switch cim:Breaker cim:Disconnector cim:LoadBreakSwitch cim: ProtectedSwitch.These classes are all mapped in the same way on IEC 61850
(2): The mapping between types is described in 5.6.2 of IEC/TS 62361-102. Below is a table describing how the mapper implements this mapping.
(3): The list of Terminal that belong to the Switch.

CIM Class IEC Class Required Remark
cim:Terminal TTerminal -
name or id name Yes
- connectivityNode - (1)
- CNodeName - (1)

(1): Use the ID of the ConnectivityNode to find the name or pathName of that ConnectivityNode. A map is saved of all ConnectivityNode that are processed for each Bay.

Mapping from Cim Switch Type to IEC TConductingEquipment

IEC 61850 Type CIM Type
BSH Connector
CAB ACLineSegment
CAB DCLineSegment
CAP ShuntCompensator
CAP SeriesCompensator
CBR ProtectedSwitch
CBR Breaker
CBR Recloser
CON FrequencyConverter
CTR CurrentTransformer
DIS Switch
DIS Disconnector
DIS Fuse
DIS Jumper
DIS LoadBreakSwitch
DIS GroundDisconnector
DIS Sectionaliser
EFN PetersenCoil
GEN GeneratingUnit
LTC TapChanger
LTC RatioTapChanger
LTC PhaseTapChanger
MOT AsynchronousMachine
PSH GroundingImpedance
PTR PowerTransformer
PTW TransformerEnd
PTW PowerTransformerEnd
PTW TransformerTankEnd
RES EarthFaultCompensator
SAR SurgeArrester
SCR ACDCConverter
SMC SynchronousMachine
TCR StaticVarCompensator
TNK TransformerTank
VTR PotentialTransformer