Transient Stability Numerical Integration Sub-Interval Models

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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:

-CHVDC2

-CONV_CELILO_E

-CONV_CELILO_N

-CONV_IntMtnPP

-CONV_SYLMAR

-MTDC_IPP

-MTDC_PDCI

-VHVDC1

Exciters Models:

-EMAC1T

-ESAC2A

-ESAC5A

-ESAC7B

-ESST1A and ESST1A_GE

-EXAC1

-EXAC2

-EXAC8B

-EXBAS

-EXDC2GE

-EXST3

-EXST3A

-IEEET2

-REXS

-REXSY1

-REXSYS

-BPA_FK

Induction Models:

-All of them

Governors Models:

-HYG3

-HYGOV

-HYGOVR

-HYGOVRU

-HYPID

-WSHYGP

Machine Models:

-GENCLS

-STCON

Stabilizers Models:

-IEEEST

-PSS2A

-PSS2B

-PSSSB