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Multiphase transformers can represent either a 1, 2, or 3-phase transformer. In the corresponding Excel tab, there are columns for declaration of up to 6 connection points (3 for Winding From end and 3 for Winding To end).
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Multiphase 2W Transformer
Parameters
Symbol | Description | Unit | |
|---|---|---|---|
ID | Transformer name | unique name | |
Status | Connect/Disconnect status | Initial value 1 (0 for disconnected) | |
Number of Phases | Phase count in use | 1, 2, or 3 | |
Winding From | Bus1 | Primary side: Bus 1 | a unique name |
Bus2 | Primary side: Bus 2 | a unique name | |
Bus3 | Primary side: Bus 3 | a unique name | |
V (kV) | Primary winding nominal voltage (phase-to-phase) | kV | |
S_base (kVA) | Nominal power in primary side | kVA | |
Conn. type (*) | Primary winding connection type | ‘wye’ and ‘delta’ | |
Winding To | Bus1 | Secondary side: Bus 1 | a unique name |
Bus2 | Secondary side: Bus 2 | a unique name | |
Bus3 | Secondary side: Bus 3 | a unique name | |
V (kV) | Secondary winding nominal voltage (phase-to-phase) | kV | |
S_base (kVA) | Nominal power in secondary side | NOT APPLICABLE | |
Conn. type (*) | Secondary winding connection type | ‘wye’ and ‘delta’ | |
Tap 1 | Initial tap position: winding 1 | Integer between Lowest and Highest Tap | |
Tap 2 | Initial tap position: winding 2 | ||
Tap 3 | Initial tap position: winding 3 | ||
Lowest Tap | The lowest tap position | Integer value | |
Highest Tap | The highest tap position | Integer value | |
Min Range (%) | Max voltage buck | 0 < value < 100 | |
Max Range (%) | Max voltage boost | value > 0 | |
X (pu) | Total reactance | p.u. | |
Rw1 (p.u.) | Primary winding resistance | p.u. | |
Rw2 (p.u.) | Secondary winding resistance | p.u. | |
Multiphase 2W Transformer with Mutual Impedance
Parameters
Symbol | Description | Unit | |
|---|---|---|---|
ID | Transformer name | a unique name | |
Status | Connect/Disconnect status | Initial value 1 (0 for disconnected) | |
Number of Phases | Phase count in use | 1, 2, or 3 | |
Winding From | Bus1 | Primary side: Bus 1 | a unique name |
Bus2 | Primary side: Bus 2 | a unique name | |
Bus3 | Primary side: Bus 3 | a unique name | |
V (kV) | Primary winding nominal voltage (phase-to-phase) | kV | |
S_base (kVA) | Nominal power in primary side | kVA | |
Conn. type (*) | Primary winding connection type | ‘wye’ and ‘delta’ | |
Winding To | Bus1 | Secondary side: Bus 1 | a unique name |
Bus2 | Secondary side: Bus 2 | a unique name | |
Bus3 | Secondary side: Bus 3 | a unique name | |
V (kV) | Secondary winding nominal voltage (phase-to-phase) | kV | |
S_base (kVA) | Nominal power in secondary side | NOT APPLICABLE | |
Conn. type (*) | Secondary winding connection type | ‘wye’ and ‘delta’ | |
Tap 1 | Initial tap position: winding 1 | Integer between Lowest and Highest Tap | |
Tap 2 | Initial tap position: winding 2 | ||
Tap 3 | Initial tap position: winding 3 | ||
Lowest Tap | The lowest tap position | Integer value | |
Highest Tap | The highest tap position | Integer value | |
Min Range (%) | Max voltage buck | 0 < value < 100 | |
Max Range (%) | Max voltage boost | value > 0 | |
Z0 leakage (pu) | Zero-sequence impedance | transformer p.u. | |
Z1 leakage (pu) | Positive-sequence impedance | transformer p.u. | |
X0/R0 | Zero-sequence reactance to resistance ratio | ratio | |
X1/R1 | Positive-sequence reactance to resistance ratio | ratio | |
No Load Loss (kW) | No-load power loss | NOT APPLICABLE | |
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