recordTransformerData
Calculates Impedances from nominal values
Extends from Modelica.Icons.Record (Icon for records).
Information
The parameters of the transformer models are calculated from parameters normally given in a technical description.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Frequency | f | Nominal frequency | |
| SI.Voltage | V1 | Primary nominal line-to-line voltage (RMS) | |
| String | C1 | Choose primary connection | |
| SI.Voltage | V2 | Secondary open circuit line-to-line voltage (RMS) @ primary nominal voltage | |
| String | C2 | Choose secondary connection | |
| SI.ApparentPower | SNominal | Nominal apparent power | |
| Real | v_sc | Impedance voltage drop pu | |
| SI.Power | P_sc | Short-circuit (copper) losses | |
| SI.Voltage | V1ph | V1/(if C1 == "D" then 1 else sqrt(3)) | Primary phase voltage (RMS) |
| SI.Current | I1ph | SNominal/(3*V1ph) | Primary phase current (RMS) |
| SI.Voltage | V2ph | V2/(if C2 == "d" then 1 else sqrt(3)) | Secondary phase voltage (RMS) |
| SI.Current | I2ph | SNominal/(3*V2ph) | Secondary phase current (RMS) |
| SI.Impedance | Z1ph | 0.5*v_sc*V1ph/I1ph | Primary impedance per phase |
| SI.Impedance | Z2ph | 0.5*v_sc*V2ph/I2ph | Secondary impedance per phase |
| Result | |||
| Real | n | V1/V2 | Ratio primary voltage (line-to-line) / secondary voltage (line-to-line) |
| SI.Resistance | R1 | 0.5*P_sc/(3*I1ph^2) | Warm primary resistance per phase |
| SI.Inductance | L1sigma | sqrt(Z1ph^2 - R1^2)/(2*Modelica.Constants.pi*f) | Primary stray inductance per phase |
| SI.Resistance | R2 | 0.5*P_sc/(3*I2ph^2) | Warm secondary resistance per phase |
| SI.Inductance | L2sigma | sqrt(Z2ph^2 - R2^2)/(2*Modelica.Constants.pi*f) | Secondary stray inductance per phase |