TransformerDataCalculates Impedances from nominal values |
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
The parameters of the transformer models are calculated from parameters normally given in a technical description.
Parameters (19)
| f |
Value: Type: Frequency (Hz) Description: Nominal frequency |
|---|---|
| V1 |
Value: Type: Voltage (V) Description: Primary nominal line-to-line voltage (RMS) |
| C1 |
Value: Type: String Description: Choose primary connection |
| V2 |
Value: Type: Voltage (V) Description: Secondary open circuit line-to-line voltage (RMS) @ primary nominal voltage |
| C2 |
Value: Type: String Description: Choose secondary connection |
| SNominal |
Value: Type: ApparentPower (V·A) Description: Nominal apparent power |
| v_sc |
Value: Type: Real Description: Impedance voltage drop pu |
| P_sc |
Value: Type: Power (W) Description: Short-circuit (copper) losses |
| n |
Value: V1 / V2 Type: Real Description: Ratio primary voltage (line-to-line) / secondary voltage (line-to-line) |
| V1ph |
Value: V1 / (if C1 == "D" then 1 else sqrt(3)) Type: Voltage (V) Description: Primary phase voltage (RMS) |
| I1ph |
Value: SNominal / (3 * V1ph) Type: Current (A) Description: Primary phase current (RMS) |
| V2ph |
Value: V2 / (if C2 == "d" then 1 else sqrt(3)) Type: Voltage (V) Description: Secondary phase voltage (RMS) |
| I2ph |
Value: SNominal / (3 * V2ph) Type: Current (A) Description: Secondary phase current (RMS) |
| Z1ph |
Value: 0.5 * v_sc * V1ph / I1ph Type: Impedance (Ω) Description: Primary impedance per phase |
| R1 |
Value: 0.5 * P_sc / (3 * I1ph ^ 2) Type: Resistance (Ω) Description: Warm primary resistance per phase |
| L1sigma |
Value: sqrt(Z1ph ^ 2 - R1 ^ 2) / (2 * Modelica.Constants.pi * f) Type: Inductance (H) Description: Primary stray inductance per phase |
| Z2ph |
Value: 0.5 * v_sc * V2ph / I2ph Type: Impedance (Ω) Description: Secondary impedance per phase |
| R2 |
Value: 0.5 * P_sc / (3 * I2ph ^ 2) Type: Resistance (Ω) Description: Warm secondary resistance per phase |
| L2sigma |
Value: sqrt(Z2ph ^ 2 - R2 ^ 2) / (2 * Modelica.Constants.pi * f) Type: Inductance (H) Description: Secondary stray inductance per phase |
Used in Examples (8)
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Modelica.Electrical.Machines.Examples.InductionMachines Test example: InductionMachineSquirrelCage transformer starting |
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Modelica.Electrical.Machines.Examples.Transformers Transformer test bench |
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Modelica.Electrical.Machines.Examples.Transformers Asymmetrical load |
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Modelica.Electrical.Machines.Examples.Transformers 6-pulse rectifier with 1 transformer |
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Modelica.Electrical.Machines.Examples.Transformers 12-pulse rectifier with 2 transformers |
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Modelica.Electrical.QuasiStatic.Machines.Examples Transformer test bench |
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Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.InductionMachines Induction machine with squirrel cage starting with transformer |
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Modelica.Magnetic.QuasiStatic.FundamentalWave.Examples.BasicMachines.InductionMachines Induction machine with squirrel cage starting with transformer |