Injection Group Display
See Also
The Injection Group Records Display presents data describing each injection group in the case. This display is available by selecting
Injection Groups Tab
This tab is organized into a top and bottom section. The top section contains the Injection Groups Case Information Display that lists all of the defined injection groups. The local menu is available by right-clicking on the display and contains options available for most case information displays as well as the option to Show Dialog to view the Injection Group Dialog.
By default, the Injection Groups Case Information Display contains the following fields:
Name
The name of the injection group. To change the name of an injection group, simply type a new name in the corresponding cell.
Number of Gens
Identifies the number of generators contained in the injection group.
% MW Gen ParFac
Indicates the degree to which generators will contribute to the MW output of the injection group relative to loads. An injection group that has a % MW Gen ParFac value of 100% receives all of its output from generator points; an injection group that has a % MW Gen ParFac of 50% and a % MW Load ParFac of 50% receives equal MW contributions from its constituent loads and generators.
Number of Loads
Identifies the number of loads contained in the injection group.
% MW Load ParFac
Indicates the degree to which MW loads will contribute to the MW output of the injection group relative to generators. An injection group that has a % MW Load ParFac value of 100% receives all of its output from load points; an injection group that has a % MW Load ParFac of 50% and a % MW Gen ParFac of 50% receives equal MW contributions from its constituent loads and generators.
% Mvar Load ParFac
Indicates the degree to which Mvar loads will contribute to the Mvar output of the injection group relative to switched shunts. An injection group that has a % Mvar Load ParFac value of 100% receives all of its Mvar output from load points; an injection group that has a % Mvar Load ParFac of 50% and a % Mvar Shunt ParFac of 50% receives equal Mvar contributions from its constituent loads and switched shunts.
Number of Shunts
Identifies the number of switched shunts contained in the injection group.
% Mvar Shunt ParFac
Indicates the degree to which switched shunts will contribute to the Mvar output of the injection group relative to Mvar loads. An injection group that has a % Mvar Shunt ParFac value of 100% receives all of its Mvar output from switched shunt points; an injection group that has a % Mvar Shunt ParFac of 50% and a % Mvar Load ParFac of 50% receives equal Mvar contributions from its constituent loads and switched shunts.
Total MW Injection
Indicates the current total MW injection of all elements in the injection group.
Total Mvar Injection
Indicates the current total Mvar injection of all elements in the injection group.
The bottom section contains additional tabs: Participation Points (All), Generators, Loads, Switched Shunts, Injection Groups and Buses. These tabs contain tables, which are variations of the Participation Point Records Display, that list all of the individual participation points for the selected injection group by element type. Participation points can be added, deleted, or modified for the selected injection group from any of the tables on these tabs. The Participation Points (All) table lists only the fields that are relevant for defining participation points while the specific element tables also make available the fields that are specific to that element type.
The Generators, Loads, Switched Shunts, Injection Groups and Buses tabs have the option to Show points that are contained by other injection group points. This option is only relevant if an injection group contains a participation point that is another injection group. When this option is checked, the individual participation points that are contained in the injection group point will also be displayed. The Contained by field will list the name of the injection group that contains a particular participation point. When this option is not checked, the points displayed will be points that are contained in the selected injection group only and no additional information will be provided about the points contained inside any injection group points belonging to the selected injection group. If the Contained by field is empty, this means that the participation point is explicitly defined with the selected injection group and does not belong to it through an injection group point.
Participation Points Tab
This tab is organized into a top and bottom section. The top section contains tabs for Generators, Loads, Switched Shunts, Injection Groupsand Buses. Tables on these tabs will list power system elements of each particular type. If the option to Only show elements that belong to at least one injection group is not checked, then all elements of each type in the case will be listed on one of these tabs. If this option is checked, then only those elements that belong to an injection group will be listed. The tables on these tabs are Case Information Displays for each particular type and have the full functionality of case information displays.
The bottom section is an Injection Groups Case Information Display. When an element from one of the tables in the top section of the tab is selected, this table will be populated with the list of injection groups to which the selected element belongs.
Injection Group Specific Scaling Options
Various tools can use injection groups to scale the system or ramp transfers between injection groups: Scaling, PV, ATC, Time Step Simulation, Island-Based AGC, and Injection Group Area Slack. These tools have options that specify how injection groups should be scaled. There are also options that can be specified with each injection group that dictate how that particular injection group should be scaled and these options override those with the particular tools. These injection group specific options can be accessed from the Injection Group Display through the list of available fields. There is a Scale folder with all relevant fields. The Use Scale Options field must be set to YES for the injection group specific options to be used. The different tools that use injection groups have different options on how injection groups should be scaled, only the injection group specific options relevant for a particular tool will be used.