WOLFRAM SYSTEMMODELER

TransformerData

Calculates Impedances from nominal values

Wolfram Language

In[1]:=
SystemModel["Modelica.Electrical.Machines.Utilities.TransformerData"]
Out[1]:=

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)

AIMC_Transformer

Modelica.Electrical.Machines.Examples.AsynchronousInductionMachines

Test example: AsynchronousInductionMachineSquirrelCage transformer starting

TransformerTestbench

Modelica.Electrical.Machines.Examples.Transformers

Transformer test bench

AsymmetricalLoad

Modelica.Electrical.Machines.Examples.Transformers

Asymmetrical load

Rectifier6pulse

Modelica.Electrical.Machines.Examples.Transformers

6-pulse rectifier with 1 transformer

Rectifier12pulse

Modelica.Electrical.Machines.Examples.Transformers

12-pulse rectifier with 2 transformers

TransformerTestbench

Modelica.Electrical.QuasiStationary.Machines.Examples

Transformer test bench

AIMC_Transformer

Modelica.Magnetic.FundamentalWave.Examples.BasicMachines

Asynchronous induction machine with squirrel cage starting with transformer

IMC_Transformer

Modelica.Magnetic.QuasiStatic.FundamentalWave.Examples.BasicMachines.InductionMachines

Induction machine with squirrel cage starting with transformer