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OpenDSS COM Documentation
Circuit Interface
The Circuit interface contains many of the methods and properties one would use to
access values related to the circuit, the present solution, and to individual circuit
elements.. You should set a variable to the Circuit interface once the active circuit has
been defined.
For example, you might do something like this VB:
Set DSSobj = New OpenDSSEngine.DSS „ sets to DSS interface
Set DSSText = DSSObj.Text
…
Set DSSCircuit = DSSObj.ActiveCircuit
Set DSSSolution = DSSCircuit.Solution
Where “DSSCircuit” is the variable that points to the Circuit interface.
Then you could use the DSSCircuit variable as follows, for example to obtain all per unit
voltages of all buses in the system:
„ Solve Power Flow and put pu voltages in cells
DSSSolution.Solve
If DSSSolution.Converged Then
V = DSSCircuit.AllBusVmagPu
…. (process busvoltages ) ….
For i = Lbound(V) to Ubound(V)
ThisSheet.Cells(i+3, 4).Value = V(i)
Next i
End If
Note that accessing most of these properties and methods without an active circuit
defined will result in no action.
Properties
ActiveBus: IBus (read only)
Returns an interface to the active bus.
ActiveElement: ICktElement (read only)
Returns an interface to the active circuit element. The active element can be established
in a number of ways such as through an Edit or Select command. In the Circuit interface,
the SetActiveElement method may be used as well as the methods for iterating through
PC elements and PD elements. The CktElements collection property will also set the
active circuit element.
