Simulator 16 User Guide - PowerWorld

Transient Stability : Transient Limit Monitors Violations
The Transient Limit Monitors page is found on the Transient Stability Analysis dialog.
As a transient stability run is processed, any violations of the Transient Limit Monitors will be stored as
a monitor violation and can be seen in the Monitor Violations table. An example is shown in the
following case information display. Note that there is an option in the Records Menu for this object
to Make a New Plot. Choosing to make a new plot will automatically create a new plot definition on
the Plot Designer portion of the dialog.
The key fields for the Monitor Violations will be the Limit Monitor Name, Transient Contingency Name,
and the identity of the violated device. In addition to these keys, up to four additional points will be
reported. Each of these four points will be represented by a value and a time of value representing the
y-x point of the trace for that point. This gives up to 8 additional values. The four points are depicted
in the following figure.
A description of the four points are as follows.
Point A represents the initial time at which the trace has violated the Limit Value. When processing
the transient stability run, a monitor violation will not be generated at the point but the trace will
start to be tracked. Also note that as soon as the trace no longer violates the limit value, point A
will essentially be reset.
Once a Point A has been encountered and the trace is being tracked, a value/time pair for Point B
will be maintained as part of the result to indicate when the most extreme violation of the limit
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