See Also
The Contingency Definition Dialog (shown below) serves as an information source for displaying the Contingency Element (or Elements) associated with individual contingencies defined in the case. You can use the Contingency Definition Dialog to scroll through the list of elements, to view and modify their definitions, to insert new elements in a contingency or to delete a contingency. You may access this dialog by choosing either Show Dialog or Insert from the local menu of the Contingency Records Display.
After making changes, click OK to save your changes and close the dialog. Click Cancel to close the dialog without saving your changes. Click Save to save your changes (including the addition of a new contingency) without closing the dialog (this allows you to keep working with the dialog). Click Delete to remove the selected contingency from the contingency list.
Contingency Definition Dialog
The Contingency Definition Dialog has the following controls that are available regardless of the tab that is currently selected:
Contingency Label
Identifies the name of the currently displayed contingency.
Add New
Click the Add New button to add a new contingency to the contingency list for the case. You will be prompted to enter a unique name for the new contingency. After naming the new contingency, the name appears in the Contingency Label and you can insert new elements in the contingency definition.
Rename
Allows you to rename the selected contingency.
Find
Opens a dialog that will allow the use of advanced search methods for finding a particular contingency.
Definition Tab
Insert New Element
Click this button to add a new element to the contingency. This will open the Contingency Element Dialog, used to define the Action, Model Criteria and Comment associated with the element. When you return to the Contingency Definition Dialog, the display will contain the newly inserted element.
Clear All
Removes all elements from the contingency definition. The Contingency Elements Table will then appear blank, indicating that the contingency involves no associated actions.
Definitions Display
The Contingency Definitions Display lists the elements assigned to the selected contingency. Select Insert from the local menu or click on the Insert New Element button to add elements to the contingency. Right-click on a specific element in the display and select Delete from the local menu to remove the element from the contingency. For more information about this display, see the Contingency Definitions Display.
Categories
A comma-separated list of user specified category names. Categories determine which Custom Monitors are applied to each contingency. See the Contingency Category topic for more information.
Define Solution Options
Click this button to open the Contingency Solution Options Dialog, used to define specific power flow solutions options for use under the selected contingency.
Use Specific Solution Options
Check this box to enable the use of Contingency Specific Solution Options (see Define Solution Options above).
Ignore ALL contingency specific solution options
If checked, all contingency specific options, either defined individually for the specific contingency or defined globally in the contingency options for all contingencies, are ignored. The solution options as saved with the case will be used.
Include Remedial Actions Added in Version 20
Check this box to include Remedial Actions and Global Actions with this contingency.
Allow Screening Added in Version 20
Check this box to run the screening process for this contingency. If not running the screening process for this contingency and the screening process is being used, the full ac contingency analysis will always be run for this contingency.
Post-Contingency Auxiliary File
The auxiliary file specified here will be loaded at the start of this contingency, which can be used to alter the reference state for this contingency. If an auxiliary file is specified here, the contingency options Post-Contingency Auxiliary File will not be loaded for this contingency. This file is applied before any contingency-specific solution options are applied. The contingency actions are then implemented after any contingency-specific solution options are applied.
Click the Browse button to open a file dialog for file selection. To remove the file, delete the contents of the text box.
If the file specified does not include a file path, then Simulator will look in the presently active directory, otherwise the file path specified will be used. If the post-contingency AUX file cannot be found in this location, then Simulator will look to see if a file by this name exists in the directory from which the presently loaded case was read. If a file is specified and still cannot be found, then when running the analysis from the contingency analysis dialog, Simulator will show a dialog requesting you to find the file or remove the option.
Instead of specifying a file here, a string containing script commands can be used instead. Multiple script commands can be separated by semi-colons. This will allow the same functionality without requiring a file to be present.
Only data stored with the contingency reference state will be "reset" when the reference state is restored. Therefore, only data stored with the reference state should be loaded via a post-contingency auxiliary file. Click here for details on the specific information stored with the reference state.
Custom Tab
The Custom page of the dialog contains two sections: custom fields and memo.
The custom fields section allows access to setting and changing the values for custom fields that have been defined for the contingency. Defining custom fields is detailed in Custom Field Descriptions.
The Memo section of the dialog is simply a location to log information about the contingency. Any information entered in the memo box will be stored with the case when the case is saved to a PWB file.
Monitoring Exceptions Tab
Monitoring exceptions can be defined for each contingency. Defining exceptions is useful when specific elements need to be excluded or included for monitoring on a contingency-by-contingency basis. Click here for more information about monitoring exceptions.