.Buildings.Electrical.Interfaces.Terminal

Information

This connector represents a generalized electric terminal. The generalization is made possible by the replaceable package Buildings.Electrical.Interfaces.Terminal.PhaseSystem. The package PhaseSystem can be one of the packages contained in Buildings.Electrical.PhaseSystems. Using this approach allows to represent DC, single phase AC and multi phases balanced and unbalanced AC systems with the same connector.

This connector is compatible with the following Modelica libraries:

• Electric Power Library developed by Modelon, and
• Power Systems Library developed by Ruediger Franke (ABB).

The connector is overdetermined since the number of effort variables is higher than the number of flow variables. This happens when the phase system has a number of reference angles PhaseSystem.m > 0. The over-determined connectors are defined and used in such a way that a Modelica tool is able to remove the superfluous but consistent equations arriving at a balanced set of equations, based on a graph analysis of the connection structure. The models have to use ad-hoc constructs specified by the Modelica language to handle this situation. More information can be found in Olsson Et Al. (2008).

More details about the generalized electrical terminal can be found in Franke and Wiesmann (2014).

References

Hans Olsson, Martin Otter, Sven Erik Mattson and Hilding Elmqvist.
Balanced Models in Modelica 3.0 for Increased Model Quality.
Proc. of the 7th Modelica Conference, Bielefeld, Germany, March 2008.

Ruediger Franke and Hansjurg Wiesmann.
Flexible modeling of electrical power systems - the Modelica PowerSystems library.
Proc. of the 10th Modelica Conference, Lund, Sweden, March 2014.

Contents

Revisions

• May 15, 2014, by Marco Bonvini:
  Created documentation.
• October 31, 2013, by Marco Bonvini:
  Model included into the Buildings library.