Simulator 16 User Guide - PowerWorld

The Save and Load Monitoring Settings buttons allow the user to save the current set or load a
previously saved set of Limit Monitoring Settings options. The options are saved in a PowerWorld
Auxiliary File text format.
Do not monitor radial lines and buses
Check this box to ignore limits on radial lines and buses throughout the case. In this instance a
radial bus is defined as a bus that is connected to the rest of the power system by a single in-service
transmission line. A radial line is the defined as a line connected to a radial bus. This means that in a
5 lines in series that connect to a radial load, only the last bus and last line will be considered radial.
If you would like to better determine which lines are "radial" in a more traditional sense, use the
feature Branches that Create Islands that allows you to easily generate a list of branches that if
taken out of service will split an existing island into two. These represent lines which may be
considered radial.
©2011 PowerWorld Corporation
Tabs on the Limit Monitoring Dialog
The tabs on the Limit Monitoring Settings Dialog allow you to change these settings. These tabs
contain tables showing lists of the respective elements. Since these tables are another variety of the
Case Information Displays, you may interact with it in a familiar manner. Click on any of the field
headings to sort by that field. Right-click on the display to call up the display’s local menu. From the
local menu, you can print the violations, copy the violation records to the Windows clipboard for use
with another application, modify the format and content of the violations listing, view the information
dialog of the respective element, and view the Quick Power Flow List or Bus View Display.
Buses Tab
Each tab shows a list of the respective type of power system element. The important columns
include:
Number, Name:Bus number between 1 and 99,999, and its alphanumeric identifier.
Area Name:Alphanumeric identifier of the bus’ area.
Monitor: toggle this between YES and NO to set whether the specific element should be
monitored.
Limit Group: toggle this value to specify which Limit Group the element belongs to
PU Volt:Bus’ per unit voltage magnitude.
Volt (kV): Bus’ actual voltage magnitude in kV. This is the per unit voltage magnitude
multiplied by the bus’ nominal voltage.
Limit Low PU Volt: Bus' individual low voltage limit used when the bus is set to use specific
voltage limits other than the default voltage limit defined in the bus' limit group. This field is
not enabled unless the "Use Specific Limits" option for the bus is set to YES. The value will
then reflect the low per unit voltage limit specified in one of the eight low voltage limit sets
that can be defined with the bus. Which voltage limit set's value is displayed depends on
which limit set is specified as the "Bus Low Rate Set" in the limit group to which the bus is
assigned.
Limit High PU Volt: Bus' individual high voltage limit used when the bus is set to use
specific voltage limits other than the default voltage limit defined in the bus' limit group. This
field is not enabled unless the "Use Specific Limits" option for the bus is set to YES. The value
will then reflect the high per unit voltage limit specified in one of the eight high voltage limit
sets that can be defined with the bus. Which voltage limit set's value is displayed depends on
which limit set is specified as the "Bus High Rate Set" in the limit group to which the bus is
assigned.
911