modelSMIBStepEfdPm
Synchronous machine infinite bus with steps on Efd and Pm
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
This test case represents a 501 MVA synchronous machine connected to an infinite bus through a transformer and a line, with an active and reactive load between the transformer and the line.A step on PmPu is applied at t = 5 s, followed by a step on EfdPu at t = 15 s. The two figures below show the expected evolution of the generator voltage and active power during the simulation.
The variations of the stator voltage are reflected in the active and reactive power consumed by the alpha-beta load, which are proportional to the voltage at the load terminal.
Initial equations are provided on the generator differential variables to ensure a steady state initialization by OpenModelica. It had to be written here and not directly in Dynawo.Electrical.Machines.OmegaRef.GeneratorSynchronous because the Dynawo simulator applies a different initialization strategy that does not involve the initial equation section.
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Dynawo.Electrical.Buses.InfiniteBus | infiniteBus | ||
| Dynawo.Electrical.Lines.Line | gridImpedance | ||
| Dynawo.Electrical.Transformers.TransformerFixedRatio | transformer | ||
| Dynawo.Electrical.Machines.OmegaRef.GeneratorSynchronous | generatorSynchronous | ||
| Dynawo.Electrical.Controls.Basics.SetPoint | Omega0Pu | ||
| Dynawo.Electrical.Controls.Basics.Step | PmPu | ||
| Dynawo.Electrical.Controls.Basics.Step | EfdPu | ||
| Dynawo.Electrical.Loads.LoadAlphaBeta | load | ||
| Modelica.Blocks.Sources.Constant | PRefPu | ||
| Modelica.Blocks.Sources.Constant | QRefPu |