modelReducedOrderSFR
Reduced order system frequency response model, based on the proposition by Anderson in 1990
Extends from SFRParameters.
Information
This model is a reduced order model that allows representing the average frequency behaviour of a reheat steam turbine.It is an implementation of the model described in the following paper:
P. M. Anderson and M. Mirheydar, "A low-order system frequency response model," in IEEE Transactions on Power Systems, vol. 5, no. 3, pp. 720-729, Aug. 1990, doi: 10.1109/59.65898.
keywords: {Frequency response;Power system modeling;Power system dynamics;Frequency estimation;Power generation;Impedance;Frequency synchronization;Nonlinear dynamical systems;Nonlinear equations;Turbines}
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Types.PerUnit | DPu (from SFRParameters) | Damping coefficient of the swing equation in pu (base SNom/omegaNom) | |
| Real | Fh (from SFRParameters) | Fraction of the total power generated by the high pressure turbine (0...1) | |
| Types.Time | H (from SFRParameters) | Inertia constant in s | |
| Real | Km (from SFRParameters) | Mechanical power gain factor | |
| Types.PerUnit | R (from SFRParameters) | Governor droop in pu (base omegaNom/SNom) | |
| Types.Time | Tr (from SFRParameters) | Reheat time constant in s | |
| Types.ActivePowerPu | Pe0Pu | Initial electrical power in pu (base SNom) | |
| Types.ActivePowerPu | Psp0Pu | Pe0Pu/Km | Initial incremental speed in pu (base SNom) |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | PePu | Generator electrical load power in pu (base SNom) | |
| Modelica.Blocks.Interfaces.RealInput | PspPu | Incremental power set point in pu (base SNom) | |
| Modelica.Blocks.Interfaces.RealOutput | deltaFrequency | Frequency variation in Hz | |
| Modelica.Blocks.Interfaces.RealOutput | deltaOmegaPu | Incremental speed in pu (base OmegaNom) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Math.Add | add | ||
| Modelica.Blocks.Math.Gain | gain2 | ||
| Modelica.Blocks.Math.Add | add1 | ||
| Modelica.Blocks.Math.Add3 | add3 | ||
| Modelica.Blocks.Continuous.Integrator | integrator | ||
| Modelica.Blocks.Math.Gain | gain1 | ||
| Modelica.Blocks.Math.Gain | gain | ||
| Modelica.Blocks.Math.Gain | gain4 | ||
| Modelica.Blocks.Continuous.FirstOrder | firstOrder | ||
| Modelica.Blocks.Math.Gain | gain3 |