Simulator 16 User Guide - PowerWorld

Select The Buses
The Bus Selection page is currently used with two displays:
The Equivalencing Display, to partition the system into the study subsystem ("Study") and the
external subsystem ("External").
The Facility Analysis Dialog, to determine the buses in the external subsystem from which the
buses in the facility would be isolated.
The following description concerns the Equivalencing Display, but the functionality of the Bus Selection
Page is similar for both applications.
Buses, Areas, and Zones lists
For both equivalencing and facility analysis, use these lists to manually change the system
designation of individual buses, areas, or zones. Note that changing the system designation on the
area or zone tab is just another form of changing the designation of study / external system of
individual buses. Click on the Which System? field in each of these tables to toggle the object’s
affiliation with the study or external systems, subject to the values of the Filter by kV option and
the Include how many tiers of neighbors? field.
In addition, the bus selection table for facility analysis contains one additional column labeled
Selected. This Yes or No field indicates which buses in the Study system belong to the Facility
being analyzed. Double-clicking one of the fields in this column will toggle the value of the field
between Yes and No.
External
Use these fields to specify a range of areas, zones, or buses to be added to the external system. The
Filter by kV and Include how many tiers of neighbors? controls will also shape the selection of
buses to add to the external system.
Study
Use these fields to specify a range of areas, zones, or buses to be added to the study system. The
Filter by kV and Include how many tiers of neighbors? controls will also shape the selection of
buses to add to the study system.
Include how many tiers of neighbors?
This value indicates the number of tiers of neighbors to carry with each selected bus when adding
the selected bus to either the study or external system. For example, if Neighbor Tiers is 1 and we
elect to add bus X to the external system, both bus X and its first tier of neighbors will be added to
the external system. If Neighbor Tiers is 0, only bus X will be added to the external system.
Filter by kV
If the Filter by kV box is checked, then only buses having a nominal voltage level between the
values given in the Max kV and Min kV fields can be selected.
Set All As External
Click this button to assign all buses to the external system.
Set Branch Terminals External or Study
Clicking either of these two buttons allows setting advanced filter criteria which define a branch or
group of branches. Once the criteria are set, clicking Filter will select the terminal buses of all
branches meeting the filter criteria, and set those buses to either the External or Study system,
depending on which button was pressed.
©2011 PowerWorld Corporation
957