modelSMEE_Generator_Polyphase
Electrical excited polyphase synchronous machine operating as generator
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
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
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | m3 | 3 | Number of stator phases of three-phase system |
| Integer | m | 5 | Number of stator phases |
| SI.Voltage | VsNominal | 100 | Nominal RMS voltage per phase |
| SI.Frequency | fsNominal | smeeData.fsNominal | Nominal frequency |
| SI.AngularVelocity | w | Modelica.Units.Conversions.from_rpm(1499) | Nominal speed |
| SI.Current | Ie | 19 | Excitation current |
| SI.Current | Ie0 | 10 | Initial excitation current |
| SI.Angle | gamma0 | 0 | Initial rotor displacement angle |
| Integer | p | 2 | Number of pole pairs |
| SI.Resistance | Rs | 0.03 | Warm stator resistance per phase |
| SI.Inductance | Lssigma | 0.1/(2*Modelica.Constants.pi*fsNominal) | Stator stray inductance per phase |
| SI.Inductance | Lmd | 1.5/(2*Modelica.Constants.pi*fsNominal) | Main field inductance in d-axis |
| SI.Inductance | Lmq | 1.5/(2*Modelica.Constants.pi*fsNominal) | Main field inductance in q-axis |
| SI.Inductance | Lrsigmad | 0.05/(2*Modelica.Constants.pi*fsNominal) | Damper stray inductance (equivalent three-phase winding) d-axis |
| SI.Inductance | Lrsigmaq | Lrsigmad | Damper stray inductance (equivalent three-phase winding) q-axis |
| SI.Resistance | Rrd | 0.04 | Warm damper resistance (equivalent three-phase winding) d-axis |
| SI.Resistance | Rrq | Rrd | Warm damper resistance (equivalent three-phase winding) q-axis |
| Modelica.Electrical.Machines.Utilities.SynchronousMachineData | smeeData | Synchronous machine data |