This information is part of the Modelica Standard Library maintained by the Modelica Association.

This example compares a time transient and a quasi static model of a electrically excited synchronous machine. The electrically excited synchronous generators are connected to the grid and driven with constant speed. Since speed is slightly smaller than synchronous speed corresponding to mains frequency, rotor angle is very slowly increased. This allows to see several characteristics dependent on rotor angle.

Simulate for 30 seconds and plot versus rotorAngle|rotorAngleQS.rotorDisplacementAngle:

• smpm|smpmQS.tauElectrical: machine torque

Since the rotor slip is very low the transient and quasi static electro magnetic torque are practically equal.

VsNominal	Value: 100 Type: Voltage (V) Description: Nominal RMS voltage per phase
fsNominal	Value: smeeData.fsNominal Type: Frequency (Hz) Description: Nominal frequency
w	Value: Modelica.SIunits.Conversions.from_rpm(1499) Type: AngularVelocity (rad/s) Description: Nominal speed
Ie	Value: 19 Type: Current (A) Description: Excitation current
Ie0	Value: 10 Type: Current (A) Description: Initial excitation current
gamma0	Value: 0 Type: Angle (rad) Description: Initial rotor displacement angle
smeeData	Value: Type: SynchronousMachineData Description: Machine data

Ptr	Default Value: powerSensor.power Type: Power (W) Description: Transient power
Pqs	Default Value: powerSensorQS.y.re Type: Power (W) Description: QS power