modelTwoPortRL_N
Model of a resistive-inductive element with two electrical ports and neutral line cable
Extends from Modelica.Electrical.Analog.Interfaces.ConditionalHeatPort, IDEAS.Electrical.AC.ThreePhasesUnbalanced.Interfaces.TwoPort_N.
Information
Resistive-inductive model that connects two AC three-phase unbalanced interfaces with neutral line. This model can be used to represent a cable in a three-phase unbalanced AC system.
The model represents the lumped impedances as shown in the figure above. Assuming that the overall cable has a resistance R and an inductance L, each line has an inductance equal to L/3 and a resistance equal to R/3.
The resistance and the inductance of the neutral cable are defined separately using the parameters
Rn and Ln.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Resistance | R | Resistance at temperature T_ref | |
| Modelica.Units.SI.Resistance | Rn | Resistance of neutral cable at temperature T_ref | |
| Modelica.Units.SI.Temperature | T_ref | 298.15 | Reference temperature |
| Modelica.Units.SI.Temperature | M | 507.65 | Temperature constant (R_actual = R*(M + T_heatPort)/(M + T_ref)) |
| Modelica.Units.SI.Inductance | L | Inductance | |
| Modelica.Units.SI.Inductance | Ln | Inductance of neutral cable | |
| Modelica.Units.SI.Current[2] | i1_start | {0, 0} | Initial current phasor of phase 1 (positive if entering from terminal p) |
| Modelica.Units.SI.Current[2] | i2_start | {0, 0} | Initial current phasor of phase 2 (positive if entering from terminal p) |
| Modelica.Units.SI.Current[2] | i3_start | {0, 0} | Initial current phasor of phase 3 (positive if entering from terminal p) |
| Modeling assumption | |||
| IDEAS.Electrical.Types.Load | mode | IDEAS.Electrical.Types.Load.FixedZ_steady_state | Type of model (e.g., steady state, dynamic, prescribed power consumption, etc.) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| OnePhase.Lines.TwoPortRL | phase1 | Impedance line 1 | |
| OnePhase.Lines.TwoPortRL | phase2 | Impedance line 2 | |
| OnePhase.Lines.TwoPortRL | phase3 | Impedance line 3 | |
| OnePhase.Lines.TwoPortRL | neutral | neutral cable RL model |
Revisions
-
March 9, 2015, by Marco Bonvini:
Added parameter for start value of the current. -
January 14, 2015, by Marco Bonvini:
Added model and user guide