Simulator 16 User Guide - PowerWorld

Contingency Definition Display
The Contingency Definition Display lists the Elements assigned to the selected Contingency. This
display appears on both the Contingency Tab and the Lines, Buses, Interfaces Tab of the Contingency
Analysis Dialog, it also appears on the Contingency Definition Dialog.
Select Insert from the local menu 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.
The contingency definition display is a type of Case Information Display and shares many
characteristics and controls common to all other case information displays.
The Contingency Definition Display always contains the following fields:
Actions
This shows a string which describes the action. You may customize the format of the string that
describes the contingency actions by right-clicking on the Contingency Definition Display and
choosing Display Descriptions By, and then choosing Name, Num, Name/Num, PW File Format by
Numbers, PW File Format by Name/kV, PTI File Format, or Label.
Model Criteria
Simulator allows you to define Model Criteria, which can consist of both Model Conditions and Model
Filters. These specify a criterion under which a contingency action would occur. For example, you
could specify that a generation outage only occur if the pre-contingency flow on a line is higher than
a specified amount. Normally, no Model Criteria will be specified, and this field will be blank. Also,
note that Model Criteria can be overridden by the Model Condition and Filter option found on
the Model Conditions page accessed from the Contingency Definitions grouping on the Options tab
of the Contingency Analysis dialog. Model Criteria can be defined from the local menu
(CTGElement records > Define Model Criteria option) on the Contingency Definition Display,
from the Add (Model Criteria) button on the Contingency Element Dialog, or by using the Model
Conditions and Model Filters pages in the Contingency Definitions grouping on the Options tab of
the Contingency Analysis dialog.
Status
Double click the Status field to toggle through the available options. The possibilities are:
Check : The action will only be executed if the Model Criteria are true or if no Model Criteria
are specified. Check is the default status setting.
Always: The action will always be executed, regardless of the Model Criteria.
Never: The action will never by executed, regardless of the Model Criteria. This allows you to
disable a particular contingency action without deleting it.
PostCheck: This action will be considered AFTER all Check and Always actions have been
performed and the load flow solution solved. If the Model Criteria specified for the PostCheck
action are met in the solved load flow solution (or if no Model Criteria are specified), then this
action is taken and the load flow is again resolved. If the model conditions are not met, the
action is skipped. This process repeats recursively for all Postcheck actions until complete. This
behavior only occurs when the Calculation Method for the analysis is set to Full Power Flow.
Because the power flow is not solved when either of the two dc methods is selected, the
PostCheck status instead acts as a Check status.
Comment
An optional user-specified data string associated with the action. For example, for an action with
Model Criteria specified, you could add a sentence explaining why the action is only performed under
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