The Tree View

The Tree View (Figure 2-6) provides a quick glance at all network data in the system. The Tree View is synchronized with the bus subsystem selector to enable the user to reduce the amount of network data presented at any one time. Folders can be expanded or collapsed to control the amount of data visible. Only one folder may be expanded at a time. Expanding a folder while another is already expanded will cause the expanded folder to collapse and the new folder to be expanded.

Figure 2-6. Tree View

When a Diagram View is active the data items in the Tree View are updated to reflect whether that particular item is drawn in the diagram or not. If the item is not drawn, then the symbol to the left of the item is blank. If the item is drawn, the symbol to the left of the item is filled with the symbol belonging to the data category (i.e., bus, branch, etc.). Refer to Figure 2-7b where a bus symbol is drawn.

The symbols in the Tree View are refreshed whenever a Diagram View is made active. A network item can be drawn in one Diagram View and not another, so the symbols found in the Tree View give a quick visual cue as to whether the network item is drawn in the active Diagram View. When the Spreadsheet View is active, all symbols are replaced with blanks.

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Figure 2-7. Items Drawn in Active Diagram View indicated in the Tree View

2.3.1 The Tree View Pop-Up Menus

A number of different pop-up menus are available by clicking the right mouse button (hereafter referred to as right-click) in and on items in the Tree View. The various pop-up menus are described below.

As was discussed in Section 2.2.2, a right-click in a blank area of the Tree View (without selecting a data category) will display the standard pop-up View Menu shown in Figure 2-4 from which hiding/exposing and docking/undocking the view can be selected.

Hide: Closes the view. The user must use the View men from the main menu to reopen them.

Allow Docking: Toggles whether the View is to be docked or a free-floating window.

2.3.1.1 Right-Click on a Tree View Data Category

Right-clicking on a specific Tree View data category (i.e., Branches) displays the pop-up menu shown in Figure 2-8. In addition to the selections shown in Figure 2-4, the Sort option has been added to the menu.

Figure 2-8. Accessing the Sort Option (a) There is no active diagram with these

buses drawn.

(b) These three buses are drawn in the active diagram where this symbol is used for buses.

Right-click on

unexpanded Branches category

The Tree View Users Manual

The Sort option causes all items in the selected data category to be sorted in ascending alphanu-meric order.

2.3.1.2 Right-Click on an Expanded Data Category Header

If the Diagram View is open and active (on top), then right-clicking on a Tree View data category that has an expanded list will display the pop-up menu shown in Figure 2-9. In addition to the selec-tions shown in Figure 2-8, the Assign all items to Layer option has been added to the menu.

Figure 2-9. Assign Items to Layers from Right-Click Menu

The Assign all items to Layer option displays the Select Layer dialog. If a layer selection is made from this dialog, all drawn items in the expanded list will have their diagram layers re-assigned and the Diagram View will be refreshed. This tool can be useful for assigning network items to layers for existing or imported diagram views.

If elements are assigned to a layer that is not currently visible, assigning them to that layer will cause them to disappear from the display. Refer to Section 2.5.10 to see the discussion on managing layers in the Diagram View.

Right-Click on Expanded Bus Category

Diagram View must be active (on top)

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2.3.1.3 Right-Click on a Data Element within an Expanded Data Category

Right-clicking on a Tree View data item (i.e., a particular bus) in an expanded category list displays different menus depending upon the data element selected and whether the Diagram View is active or not.

Figure 2-10. Menu from Right-Clicking on Data Item in Expanded List

If the pop-up menu is launched with the Spreadsheet View active, the following menu options are available:

Switch: Toggles the switch status of the selected network element (i.e., disconnects the device).

Network Data: Points to the selected network element in the Spreadsheet View on the rel-evant data tab, and places the focus on the first spreadsheet cell of the selected item.

Delete: Deletes the network element from the model.

If the selected element is a bus, area, zone or owner, the menu offers the user the ability to create a subsystem based on the selected element.

Create bus subsystem: Create a bus-based subsystem. (i.e., filters the model by a set of selected buses).

Create area subsystem: Create an area-based subsystem. (i.e., filters the model by a set of selected areas).

Create zone subsystem: Create a zone-based subsystem. (i.e., filters the model by a set of selected zones).

Create owner subsystem: Create an owner-based subsystem. (i.e., filters the model by a set of selected owners).

If the Diagram View is the active view, then the right-click menu for the selected element will offer some additional options:

Assign to Layer: Displays the Select Layer dialog. If a layer selection is made from this dialog, the network element can be assigned to a Diagram layer and the Diagram View is

Diagram View Active

Spreadsheet View Active

The Tree View Users Manual

refreshed. This tool can be useful for assigning a network item to a layer for existing or imported diagram views.

Locate: The Locate menu option is available if the selected element is drawn in the dia-gram. It allows you to easily locate the element on the diadia-gram.

Bind: Bind literally relates the model element to a graphical element on the diagram.

Selecting an "unbound" element on the diagram, then selecting Bind from the right-click menu forces PSS/E to couple the two together. The Bind option is discussed in more detail in Section 2.9.5.

If the selected item is a bus and it is not drawn in the active Diagram View, then the Draw menu option become available:

Draw: Selecting Draw from the pop-up menu draws the bus and all its equipment in the active Diagram View.

If the selected item is a bus and is drawn in the active Diagram View, then only the Grow option is available.

Grow: Selecting Grow will draw the bus, all its equipment, all connected buses and their equipment, and all the lines and transformers between them. Grow differs from Draw in that Draw only draws the bus and it’s equipment.

2.3.2 Double-Clicking

Double-clicking on a data element (i.e. particular bus) is equivalent to selecting the Network Data option from the right-click menu. Both actions activate the Spreadsheet View, change to the correct data tab, and place the focus on the first spreadsheet cell of the selected item (see Figure 2-11).

Figure 2-11. Double-Clicking on Tree View Double-clicking on Bus 151 in the Tree View ...

... Points to Bus 151 on Spreadsheet View Bus Tab

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