.BuildingSystems.Electrical.Transmission.BaseClasses.PartialBaseLine

Information

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 BuildingSystems.Electrical.Transmission.BaseClasses.BaseCable such as ( BuildingSystems.Electrical.Transmission.LowVoltageCables.Generic or BuildingSystems.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.

Commercial cable mode

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:

• Low voltage,
• Medium voltage, and
• High voltage.

The details and type of cables can be found in BuildingSystems.Electrical.Transmission.LowVoltageCables and BuildingSystems.Electrical.Transmission.MediumVoltageCables.

Automatic cable mode

If mode = automatic, the type of cable is automatically selected depending on the value of the parameters V_nominal and P_nominal.

Note:

More details about the functions that compute the type of cable and its properties can be found in BuildingSystems.Electrical.Transmission.Functions.

The parameter commercialCable is assumed to be BuildingSystems.Electrical.Transmission.LowVoltageCables.Generic. The parameter is replaceable so it can be redeclared using a different type, for example BuildingSystems.Electrical.Transmission.MediumVoltageCables.Generic.
The example models BuildingSystems.Electrical.AC.ThreePhasesBalanced.Lines.Examples.ACLineMedium and BuildingSystems.Electrical.AC.ThreePhasesBalanced.Lines.Examples.ACSimpleGridMedium show how this can be done.

Revisions

• September 23, 2014, by Marco Bonvini:
  Revised model and documentation according to change in the structure of the cable record.
• June 3, 2014, by Marco Bonvini:
  Added User's guide.