Transient Stability Numerical Integration Sub-Interval Models
Sub-Interval Integration Models
The user can set the Sub-Interval of any dynamic model by selecting the Sub-Intervals (TSSubintervals) field for the desired model in the Transient Stability folder in Model Explorer. You can specify the numbers if sub-interval integration steps to use.
A blank value will let Simulator use an automatically determined sub-interval count for that particular model type. For most models, the automatically determined value is Sub-Intervals = 1, which means that a time-step will not divided into sub-intervals during integration.
The sub-interval value must be either blank, 1 , 2, 4, 8, 16, 32, 64 or 128.
If the value entered does not belong to this list, it is modified as follows:
If (Sub-Intervals ≤ 0) Then Sub-Intervals = blank
ElseIf (Sub-intervals ≤ 1) Then Sub-Intervals = 1
ElseIf (Sub-intervals ≤ 2) Then Sub-Intervals = 2
ElseIf (Sub-intervals ≤ 4) Then Sub-Intervals = 4
ElseIf (Sub-intervals ≤ 8) Then Sub-Intervals = 8
ElseIf (Sub-intervals ≤ 16) Then Sub-Intervals = 16
ElseIf (Sub-intervals ≤ 32) Then Sub-Intervals = 32
ElseIf (Sub-intervals ≤ 64) Then Sub-Intervals = 64
Else Sub-Intervals = 128
The models that will cause Simulator to use a default step if a blank value is used for the model are:
DC Models:
Exciters Models:
-REXS
Induction Models:
-All of them
Governors Models:
-HYG3
Machine Models:
Stabilizers Models: