See Also
The Automatic Insertion of Lines/Transformers Dialog is used to automatically draw transmission lines and transformers on the oneline diagram between existing bus display objects. Only branches that are already defined in the power flow case can be added automatically; if you need to define a brand new branch, see Transmission Line Display Objects. Thus, this option is useful only when you are starting with an existing power flow case, not building a case from scratch.
To insert lines and transformers automatically, you must first have drawn the buses for each end of the device. Simulator then draws the branch display objects connecting the buses for each transmission line/transformer in the power flow case not already shown on the oneline.
To display the dialog, in the Edit Mode
The dialog has the following options:
Minimum kV Level
Simulator will automatically draw line and transformer display objects between terminals whose nominal voltages meet or exceed the minimum kV level specified in this field. For a branch object to be drawn, either one of its terminals must satisfy this criterion. This option is useful for suppressing the automatic addition of generator step-up transformers if that kind of detail is not warranted.
Default Drawing Values
This button opens the Default Drawing Values Dialog. Options such as the automatic insertion of transmission line stubs, text fields, circuit breakers, and pie charts are specified in the Default Drawing Values Dialog.
Insert Text Fields
If this box is checked, the default fields associated with the transmission line will appear around the transmission line.
Insert Equivalenced Objects
If this option is checked, equivalenced objects modeled as lines will also be automatically inserted with the real transmission lines.
Use Only Selected Buses
Instead of having Simulator automatically insert line and transformer display objects throughout the oneline diagram, you can force it to insert the new objects only between the bus display objects that are currently selected. This option is enabled only when two or more bus display objects are currently selected on the oneline.
Insert Pie Chart for Lines with No Limit and Bus Ties
If this option is checked, Simulator will add pie chart objects to the lines that have no given limit or are bus ties as they are auto-inserted. Typically if a line is a bus tie or has no given limit, it is meaningless to include a pie chart on the element, since no relevant information about the transmission element can be gained from the pie chart object.
Insert Multi Section Lines
Check this option if you wish for Simulator to automatically insert lines designated as multi-section lines as well.
Identifying Bus Ties
This area deals with lines used as ties between breakers. These lines are modeled as zero impedance connections. The identification of a branch as a bus tie depends on the value specified as the Maximum P.U. Impedance for Bus Ties. Branches with total P.U. impedance below this value will be considered bus ties when auto-inserted.
In this area two choices are given for how to insert the bus tie breakers: Do not insert stubs for bus ties and Only insert a single circuit breaker. The first choice allows you to decide if line stubs will be drawn when the tie breaker is inserted. The second sets whether or not only one circuit breaker is inserted on the tie breaker. This could be useful for determining real lines from bus tie breakers.