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 [Gremmel1999], but with the addition of a central phase-to-ground admittance, cf. following picture.
All impedances and admittances are given with respect to the higher voltage side.
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 impedance in branch A |
xScB | Ω | Short circuit impedance in branch B |
xScC | Ω | Short circuit impedance 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 |
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 | -- | Amount of parallel devices of same attributes |
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!
[Gremmel1999] | Gremmel, H., Ed., Schaltanlagen. Cornelsen Verlag, 1999, Vol. 10, isbn: 3-464-48235-9. |