Contingency Options: Bus Load Throw Over Records

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The Bus Load Throw Over list display, which is opened from the Modeling group of the Contingency Analysis dialog Options page, provides you with the capability to define how load at a bus should be transferred to a different bus if the original terminal bus becomes disconnected from the system. This is referred to in Simulator as "throw over." This tool is most useful when performing contingency analysis scenarios in which buses containing loads become disconnected and you wish to analyze the impact on the system of switching the load from the disconnected bus to another bus that is still in service.

Load throw over will only attempt to move the load once, from the original bus to the load throw over bus. If the load throw over bus is already disconnected from the system, then the load will be treated as dropped during the contingency solution.

NOTE: The load throw over is only used when running the contingency analysis tool to analyze contingency effects on the system. Load throw over records are not used during manual solution of the power flow, even if you manually disconnect a bus with load and perform a load flow solution.

The Bus Load Throw Over display has the following fields:

Number, Name

The bus number and name of the load’s terminal bus.

Nom kV

The nominal voltage level of the load’s terminal bus.

Load Throw Over Bus Number

Enter the number of the bus you wish to have the load transferred to, should the original load terminal bus become disconnected during a contingency in the contingency analysis. The Load Throwover Bus Name_kV field will be automatically populated.

Load Throw Over Bus Name_kV

Enter the bus name and nominal kV (separated by a _ between the name and nominal kV) of the bus you wish the load to be transferred to, should the original load terminal bus become disconnected during a contingency in the contingency analysis. The Load Throw Over Bus Number will be automatically populated if the corresponding Bus Name_kV is found.

If choosing to identify objects by labels, this field can also be used to display and enter the label of the load throw over bus.