IEEE Power & Energy Magazine - January/February 2016 - 73

Non-Breaker Example from IEC 61970-301 Figure 10
Terminal

SS2
400 KV
BB1
Volts
(KV)
CN5

CNx: ConnectivityNode

SS1-SS2

TPx: TopologicalNode

P1
(MW)
DC2

CN4

BR1

SS1
CN3 Cable1 CN2

Cable2

CN1

BRx: Breaker
BBx: BusbarSection
SSx: Substation
xKV: Voltagelevel
Tx: PowerTransformer

Cable3

BR3

P2
(MW)

SSx-SSy: Line
Measurement

CN6

CN8

T1

Resulting Bus Topological Node x (TPx)
in Substation SS2 Volatge Level 400 KV
After Removal of Closed Switches
BR3, DC2, and BR1

SS4

CN7
110 KV

TPx Contains Connectivity Nodes
That Have Been Reduced,
i.e., CN6, CN5, CN4, CN3

BB1

TPx

Cable 1

T1

figure 3. An example computation of a power flow bus.

Bus-Branch Profile
EnergyConsumer
+ mRID : String
+ name : String
+ p : ActivePower
+ q : ActivePower

ACLineSegment
+ mRID : String
+ name : String
+ length : Length
+ bch : Susceptance
+ gch : Conductance
+ r : Resistance
+ x : Reactance

ConductingEquipment
1

TopologicalNode
+ mRID : String
+ name : String
TopologicalNode
1

Terminals
1
Terminals
2
ConductingEquipment
1

Terminals
1..*
Terminal
+ mRID : String
+ name : String
+ connected : Boolean
+ sequenceNumber : Integer
+ phases : PhaseCode

figure 4. A subset for a bus-branch profile.

from the canonical model class, and all other attributes have
been omitted from the profile. The aclinesegment class
retains only the basic attributes required for simple power
flow with the zero-sequence attributes from the canonical
model discarded for this profile.
january/february 2016

at the terminal level, we retain the link to Topologicalnode as this is the cIm class for representing a computed
bus in a bus-branch representation of a model. The connectivitynode association is not retained as this is used for
node-switch models and is not required for our bus-branch
ieee power & energy magazine

73



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - January/February 2016

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IEEE Power & Energy Magazine - January/February 2016 - Cover3
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