WOLFRAM SYSTEM MODELER
SMEE_Generator_PolyphaseElectrical excited polyphase synchronous machine operating as generator |
 |
Diagram
Wolfram Language
In[1]:=
SystemModel["Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.SynchronousMachines.ComparisonPolyphase.SMEE_Generator_Polyphase"]
Out[1]:=
Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Electrical excited synchronous machine as generator
Two electrically excited synchronous generators are connected to grids and driven with constant speed. Since speed is slightly smaller than synchronous speed corresponding to mains frequency, rotor angle is very slowly increased. Two equivalent machines with different numbers of phases are compared and their equal behavior is demonstrated.
Simulate for 30 seconds and plot (versus rotorAngleM3.rotorDisplacementAngle):
aimcM|M3.tauElectrical: machine torqueaimsM|M3.wMechanical: machine speedfeedback.y: zero since difference of three-phase current phasor and scaled polyphase current phasor are equal
Parameters (17)
| m |
Value: 5 Type: Integer Description: Number of stator phases |
|---|---|
| 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.Units.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 |
| p |
Value: 2 Type: Integer Description: Number of pole pairs |
| Rs |
Value: 0.03 Type: Resistance (Ω) Description: Warm stator resistance per phase |
| Lssigma |
Value: 0.1 / (2 * Modelica.Constants.pi * fsNominal) Type: Inductance (H) Description: Stator stray inductance per phase |
| Lmd |
Value: 1.5 / (2 * Modelica.Constants.pi * fsNominal) Type: Inductance (H) Description: Main field inductance in d-axis |
| Lmq |
Value: 1.5 / (2 * Modelica.Constants.pi * fsNominal) Type: Inductance (H) Description: Main field inductance in q-axis |
| Lrsigmad |
Value: 0.05 / (2 * Modelica.Constants.pi * fsNominal) Type: Inductance (H) Description: Damper stray inductance (equivalent three-phase winding) d-axis |
| Lrsigmaq |
Value: Lrsigmad Type: Inductance (H) Description: Damper stray inductance (equivalent three-phase winding) q-axis |
| Rrd |
Value: 0.04 Type: Resistance (Ω) Description: Warm damper resistance (equivalent three-phase winding) d-axis |
| Rrq |
Value: Rrd Type: Resistance (Ω) Description: Warm damper resistance (equivalent three-phase winding) q-axis |
| smeeData |
Value: Type: SynchronousMachineData Description: Synchronous machine data |
Components (26)
 |
star3 |
Type: Star Description: Star-connection |
|---|---|---|
 |
ground3 |
Type: Ground Description: Ground node |
 |
sineVoltage3 |
Type: SineVoltage Description: Polyphase sine voltage source |
 |
electricalPowerSensorM |
Type: PowerSensor Description: Polyphase instantaneous power sensor |
 |
electricalPowerSensor3 |
Type: ElectricalPowerSensor Description: Instantaneous power from space phasors |
 |
terminalBoxM |
Type: TerminalBox Description: Terminal box Y/D-connection |
|
terminalBox3 |
Type: TerminalBox Description: Terminal box Y/D-connection |
 |
smeeM |
Type: SM_ElectricalExcited Description: Electrical excited synchronous machine with optional damper cage |
|
smee3 |
Type: SM_ElectricalExcited Description: Electrical excited synchronous machine with optional damper cage |
|
groundRM |
Type: Ground Description: Ground node |
|
groundR3 |
Type: Ground Description: Ground node |
 |
rampCurrentM |
Type: RampCurrent Description: Ramp current source |
|
rampCurrent3 |
Type: RampCurrent Description: Ramp current source |
 |
rotorAngle3 |
Type: RotorDisplacementAngle Description: Rotor lagging angle |
 |
mechanicalPowerSensorM |
Type: MechanicalPowerSensor Description: Mechanical power = torque x speed |
|
mechanicalPowerSensor3 |
Type: MechanicalPowerSensor Description: Mechanical power = torque x speed |
 |
constantSpeedM |
Type: ConstantSpeed Description: Constant speed, not dependent on torque |
|
constantSpeed3 |
Type: ConstantSpeed Description: Constant speed, not dependent on torque |
 |
smeeData |
Type: SynchronousMachineData Description: Synchronous machine data |
 |
currentRMSsensorM |
Type: CurrentQuasiRMSSensor Description: Continuous quasi current RMS sensor for polyphase system |
 |
currentRMSsensor3 |
Type: CurrentQuasiRMSSensor Description: Length of space phasor -> RMS current |
 |
gain |
Type: Gain Description: Output the product of a gain value with the input signal |
 |
feedback |
Type: Feedback Description: Output difference between commanded and feedback input |
|
starM |
Type: Star Description: Star-connection |
|
groundM |
Type: Ground Description: Ground node |
|
sineVoltageM |
Type: SineVoltage Description: Polyphase sine voltage source |