This example shows how to use three different types of load models. Each load is of type AixLib.Electrical.DC.Loads.Conductor.
The first load loa1consumes a constant amount of power.
The second and the third loads (loa2 and loa3) consume a variable amount of power.
The load loa2 has a variable input y between 0 and 1 that specifies the portion of
nominal power that is consumed.
The load loa3 has a variable input Pow that represents the actual power consumed
(or produced) by the load.