See Also
The Automatic Line Tap Dialog will allow you to define the settings to use for inserting a new bus along a transmission line. The transmission line to tap will be represented in the panel at the top of the dialog, displayed as a Near Bus and Far Bus. If the Automatic Line Tap Dialog was opened by right-clicking a line on a oneline diagram, or by right-clicking on a record in the case information display, the line will already be selected in the panel. You can change the line selection by first choosing the Near Bus you desire, and then selecting the Far Bus from the list of possible connections to the chosen Near Bus. Note that the percentage entered in the Position along line field will be in relation to the selected Near Bus. The inserted bus and new sections of the tapped line will adhere to the following settings:
Position along line
The field labeled Position along line will indicate the point where you right-clicked the mouse relative to the location of the Near Bus to the mouse-click in terms of a percentage of the total line length. In other words, if the line is 10 units long, and you clicked the right mouse at location 7 units from the Near Bus end of the line, the Position along line will indicate 70%. If you opened the Automatic Line Tap Dialog from the case information display or the Tools ribbon tab, the Position along Line will be set to 50%. In either case, you can adjust this setting to place the new bus more precisely. The placement of the new bus controls how the impedances of the new lines are set, as the impedance of each section will equal the section’s corresponding percentage length multiplied by the impedance of the original line. Note that the original charging capacitance of the line will be reassigned as determined by the selection under the Shunt Model option.
New Bus Number
By default, Simulator will find and set an unused bus number for you, but you can specify the number to be used for the new bus, between 1 and 2147483647. If you enter a bus number that already exists, you will be prompted to enter a different number when you click the Tap button.
New Bus Name
Specify a name to be assigned to the new bus. By default this field is blank, and if left blank Simulator will set the name of the bus the same as the new bus number.
New Bus Area
You can specify the area for the new bus to be the same as the Near Bus, the Far Bus, or another value of your specification. If you select the Specify option, the edit box and find button will become enabled. You can then enter an area number manually, or click Find to locate an area from the list of areas currently in the case. If you want a new area to be assigned to the case for this bus, simply enter an unused area number manually in the box, and Simulator will automatically set up the new area record for the case. You can then open the Area Information Display and set the name and other values for the new area.
New Bus Zone
You can specify the zone for the new bus to be the same as the Near Bus, the Far Bus, or another zone of your specification. If you select the Specify option, the edit box and find button will become enabled. You can then enter a zone number manually, or click Find to locate a zone from the list of zones currently in the case. If you want a new zone to be assigned to the case for this bus, simply enter an unused zone number manually in the box, and Simulator will automatically set up the new zone record for the case. You can then open the Zone Information Display and set the name and other values for the new Zone.
Shunt Model
Options determines how the charging B and G values of the transmission line are handled. By default, Simulator will use the long-line PI equivalent equations to determine appropriate values for B and G for the two new lines. Alternatively, you can assign the original charging capacitance as line shunts at the original terminal bus ends of the two new line segments in which case the charging capacitance of the two new branch elements will be set to 0.
Treat sections as a multi-section line
Check the box labeled Treat sections as a multi-section line to force the status of the two new line sections to be controlled in unison. Checking this box will cause a multi-section line to be created comprised of the two new line sections. See Multi-Section Line Information for details.
Click the Tap button to close the Automatic Line Tap Dialog and perform the line tap. If a value on the dialog is not set properly, a warning message will appear, and you will need to either change the specified value or cancel the process.