(transformer3w-model)=
Model of a three winding transformer. It is assumed, that node A is the node with highest, node B with intermediate and node C with lowest voltage.
The assumed mathematical model is inspired by ABB Schaltanlagenhanbuch 1, but with the addition of a central phase-to-ground admittance, cf. following picture.
---
align: center
name: Equivalent circuit diagram of a three winding transformer
---
"Star like" T-equivalent circuit diagram of a three winding transformer
All impedances and admittances are given with respect to the higher voltage side.
.. list-table::
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* - Attribute
- Unit
- Remarks
* - uuid
-
-
* - id
-
- Human readable identifier
* - rScA
- Ω
- Short circuit resistance in branch A
* - rScB
- Ω
- Short circuit resistance in branch B
* - rScC
- Ω
- Short circuit resistance in branch C
* - xScA
- Ω
- Short circuit reactance in branch A
* - xScB
- Ω
- Short circuit reactance in branch B
* - xScC
- Ω
- Short circuit reactance in branch C
* - gM
- nS
- No load conductance
* - bM
- nS
- No load susceptance
* - sRatedA
- kVA
- Rated apparent power of branch A
* - sRatedB
- kVA
- Rated apparent power of branch B
* - sRatedC
- kVA
- Rated apparent power of branch C
* - vRatedA
- kV
- Rated voltage at higher node A
* - vRatedB
- kV
- Rated voltage at higher node B
* - vRatedC
- kV
- Rated voltage at higher node C
* - dV
- %
- Voltage magnitude increase per tap position
* - dPhi
- °
- Voltage angle increase per tap position
* - tapNeutr
-
- Neutral tap position
* - tapMin
-
- Minimum tap position
* - tapMax
-
- Maximum tap position
.. list-table::
:widths: 33 33 33
:header-rows: 0
* - Attribute
- Unit
- Remarks
* - uuid
- --
-
* - id
- --
- Human readable identifier
* - operator
- --
-
* - operationTime
- --
- Timely restriction of operation
* - nodeA
- --
- Higher voltage node
* - nodeB
- --
- Intermediate voltage node
* - nodeC
- --
- Lowest voltage node
* - parallelDevices
- --
- | overall amount of parallel transformers to automatically
| construct (e.g. parallelDevices = 2 will build a
| total of two transformers using the specified parameters)
* - type
- --
-
* - tapPos
- --
- Current position of the tap changer
* - autoTap
- --
- true, if there is a tap regulation apparent and active
Nothing - at least not known. If you found something, please contact us!
Footnotes
-
Gremmel, H., Ed., Schaltanlagen. Cornelsen Verlag, 1999, Vol. 10, isbn: 3-464-48235-9. ↩