This partial model represents a generalized electrical network.
The model has three main components. The parameter grid declares the type
Buildings.Electrical.Transmission.Grids.PartialGrid
that contains the information about the topology of the network, such as
the number of nodes,
how they are connected, and the length of each connection.
The parameter terminal[...] declares
an array of generalized electric connectors that are associated to each node of the grid.
The parameter lines[...] is an array of type
Buildings.Electrical.Transmission.BaseClasses.PartialBaseLine that represent the cables
in the grid.
This is a partial model that once extended can represent either DC or AC networks. This model is based on the assumption that the topology of the network does not depend on the type of cables that connect the nodes.