This partial model contains parameters and variables needed to parametrize a generic cable. The resistance, inductance and capacitance are computed by the functions associated to the type of cable selected. The type of cable is specified using a record that inherits from Buildings.Electrical.Transmission.BaseClasses.BaseCable such as ( Buildings.Electrical.Transmission.LowVoltageCables.Generic or Buildings.Electrical.Transmission.MediumVoltageCables.Generic). The record contains functions that depending on the properties of cable compute its resistance, inductance or capacitance.
The model has two parameters use_C and modelMode that
change the behaviour of the model. It is possible to include the effects
of a capacity or select the model to be dynamic or steady state. More information
are available in the line models that extends this partial model.
If mode = commercial, the user can select the type of cable from a list
of commercial cables. The cables are divided in three different categories:
The details and type of cables can be found in Buildings.Electrical.Transmission.LowVoltageCables and Buildings.Electrical.Transmission.MediumVoltageCables.
If mode = automatic, the type of cable is automatically selected
depending on the value of the parameters V_nominal and
P_nominal.
More details about the functions that compute the type of cable and its properties can be found in Buildings.Electrical.Transmission.Functions.
The parameter commercialCable is assumed to be
Buildings.Electrical.Transmission.LowVoltageCables.Generic.
The parameter is replaceable so it can be redeclared using a different type, for example
Buildings.Electrical.Transmission.MediumVoltageCables.Generic.
The example models
Buildings.Electrical.AC.ThreePhasesBalanced.Lines.Examples.ACLineMedium and
Buildings.Electrical.AC.ThreePhasesBalanced.Lines.Examples.ACSimpleGridMedium
show how this can be done.