Line Shunts Display

See Also

 

The Line Shunts Display identifies all line shunt devices in the case. Line shunts are similar to switched shunts in that they are used in power systems either to inject additional MVR into the system (capacitive shunts) or to absorb excess reactive power (inductive shunts). However instead of being connected to a bus directly, they are instead shunt connected to one of the terminals of a transmission line. As a result they can only be in-service if the actual transmission line is in-service. Also, Simulator also does not allow the automatic regulation of a bus voltage using Line Shunts as is possible using a switched shunt. Simulator does however allow line shunts to be individually taken in and out of service. This must be done manually however using the status field of the line shunt.

The Line Shunts Display is a class of Case Information Display and therefore can be used in a manner consistent with all other case information displays. It has a local menu from which you can print, copy, and modify its information as well as view the information dialog of its associated line shunts. You can find a specific line shunt using its bus name or number, and you can learn more about a particular shunt’s terminal bus by choosing either Quick Power Flow List or Bus View. When in Edit Mode, you can insert a new line shunt into the case or delete an existing shunt. You can also sort the line shunt information by clicking on the heading of the field by which you want to sort. Additionally, you can choose to restrict the information shown by the Line Shunts Display according to the constraints of the area/zone/owner filters.

To call up the Line Shunts Display, click Network > Line Shunts in the Model Explorer.

 

The Line Shunts Display contains the following fields by default:

From Number and To Number

Numbers of from and to bus of the transmission branch to which the line shunt is attached. Use the right menu options to inspect either the Quick Power Flow List or the Bus View Display for the terminal buses.

Circuit

Circuit identifier for the transmission branch to which the line shunt is attached.

Bus Number Located At

Either the From or To Bus number. Specified the end of the transmission branch to which the line shunt is attached.

ID

A circuit identifier for the actual line shunt. This is needed because there can be multiple line shunts at the same end of the same transmission line.

G, B

Indicates the line shunts nominal conductance and susceptance in per unit on the system base.

Status

Line shunts can be individually taken in and out of service. Do this by changing the status field to Open or Closed.