WOLFRAM SYSTEMMODELER

SMEE_DOL

ElectricalExcitedSynchronousInductionMachine starting direct on line

Diagram

Wolfram Language

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SystemModel["Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.SMEE_DOL"]
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Information

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

An electrically excited synchronous generator is started direct on line utilizing the damper cage (and the shorted excitation winding) at 0 seconds.

At t = 0.5 seconds, the excitation voltage is raised to achieve the no-load excitation current. Note, that reactive power of the stator goes to zero.

At t = 2 second, a driving torque step is applied to the shaft (i.e. the turbine is activated). Note, that the active (and the reactive) power of the stator change. To drive at higher torque, i.e., produce more electric power, excitation has to be adapted.

Simulate for 3 seconds and plot:

  • smee.tauElectrical: electric torque
  • smee.wMechanical: mechanical speed
  • currentRMSSensor.I: quasi RMS stator current
  • irRMS: quasi RMS rotor current
  • smee.ie: excitation current
  • rotorDisplacementAngle.rotorDisplacementAngle: rotor displacement angle
  • electricalSensor.powerTotal: total electric real power
  • mechanicalSensor.power: mechanical power

Default machine parameters are used.

Note

The mains switch is closed at time = 0 in order to avoid non physical noise calculated by the rotorDisplacementAngle. This noise is caused by the interaction of the high resistance of the switch and the machine, see #2388.

Parameters (5)

VNominal

Value: 100

Type: Voltage (V)

Description: Nominal RMS voltage per phase

fNominal

Value: 50

Type: Frequency (Hz)

Description: Nominal frequency

Ve

Value: smeeData.Re * smeeData.IeOpenCircuit

Type: Voltage (V)

Description: Excitation current

gamma0

Value: 0

Type: Angle (rad)

Description: Initial rotor displacement angle

smeeData

Value:

Type: SynchronousMachineData

Connectors (1)

irRMS

Type: RealOutput

Description: Damper cage RMS current

Components (16)

smee

Type: SM_ElectricalExcited

rotorDisplacementAngle

Type: RotorDisplacementAngle

groundExcitation

Type: Ground

mechanicalSensor

Type: MultiSensor

electricalSensor

Type: MultiSensor

currentRMSSensor

Type: CurrentQuasiRMSSensor

sineVoltage

Type: SineVoltage

star

Type: Star

ground

Type: Ground

rampVoltage

Type: RampVoltage

terminalBox

Type: TerminalBox

smeeData

Type: SynchronousMachineData

switch

Type: IdealClosingSwitch

booleanStep

Type: BooleanStep

booleanReplicator

Type: BooleanReplicator

torqueStep

Type: TorqueStep