This model represents a generic load that can be extended to represent either a DC or an AC load.
The model has a single generalized electric terminal of type
Buildings.Electrical.Interfaces.Terminal
that can be redeclared.
The generalized load is modeled as an impedance whose value can change. The value of the impedance
can change depending on the value of the parameter mode, which is of type
Buildings.Electrical.Types.Load:
| Mode | Description | Explanation |
|---|---|---|
| Buildings.Electrical.Types.Load.FixedZ_steady_state | fixed Z steady state | The load consumes exactly the power
specified by the parameter P_nominal.
|
| Buildings.Electrical.Types.Load.FixedZ_dynamic | fixed Z dynamic |
The load consumes exactly the power
specified by the parameter P_nominal at steady state.
Depending on the type
of load (e.g., inductive or capacitive)
different dynamics are represented.
|
| Buildings.Electrical.Types.Load.VariableZ_P_input | variable Z P input |
The load consumes exactly the power specified
by the input variable Pow.
|
| Buildings.Electrical.Types.Load.VariableZ_y_input | variable Z y input |
The load consumes exactly the a fraction of the nominal power
P_nominal specified by the input variable y.
|
It is assumed that the power P of the load is positive when produced
(e.g., the load acts like a source) and negative when consumed (e.g., the
source acts like a utilizer).
The model has a Boolean parameter linearized that by default is equal to false.
When the power consumption of the load is imposed, this introduces
a nonlinear equation between the voltage and the current of the load. This flag is used to
select between a linearized version
of the equations or the original nonlinear ones.
When the linearized version of the model is used, the parameter V_nominal has to
be specified. The nominal voltage is needed to linearize the nonlinear equations.
Note: A linearized model will not consume the nominal power if the voltage at the terminal differs from the nominal voltage.
| Name | Description |
|---|---|
| PhaseSystem | Phase system |
P.
P_nominal
and removed assertion warning.
This is required for pedantic model check in Dymola.
This is for
#426.
P_nominal if
mode <> Buildings.Electrical.Types.Load.VariableZ_P_input.
This avoids a warning during translation of
Buildings.Examples.ChillerPlant.DataCenterRenewables.
linear to linearized
because Buildings.Fluid also uses linearized.
This change has been done to use a consistent naming across the library.
initMode that can be used to
select the assumption to be used during initialization phase
by the homotopy operator.