Simulator 16 User Guide - PowerWorld

Transformers Bases and Impedances Dialog
Typically the impedances and tap values of transformers is already assumed to have been converted
to unity tap base and bus nominal voltage base. However, some load flow formats provide the taps
and impedances on specific transformer bases, which are different than the bus voltage and unity tap
base assumptions. In these cases, Simulator will convert parameters from the transformer bases to the
unity tap and bus nominal voltage base. Display of the impedances and tap values normally displayed
in the Branch Options dialog are displayed on the Simulator assumed bases. However, if you wish to
view the original transformer values on the transformer supplied bases, this dialog will display the
original values. You can modify the original values stored here in this dialog. Note that when you do
so, the converted values that Simulator stores on the system bases will also be automatically updated
to reflect the change that has been made to the original values on the transformer bases.
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