Zone Display

See Also

 

The Zone Display provides information about all the zones in the case. Similar to the Area Display, the Zone Display provides a means of dividing up a power system. System results can then be summarized by zones using this display. Buses can be assigned to zones independent of their area assignments. Thus a single area could contain multiple zones, or a single zone could span multiple areas. The zone number for each bus is shown on the Bus Dialog. In the Edit Mode, groups of buses can be easily moved from one zone to another using the Zone Dialog.

The Zone Records Display is a class of Case Information Display and therefore can be used in a manner consistent with all other case information displays. It has a local menu from which you can print, copy, and modify its records as well as view the information dialog of its associated zones. You can call up the Quick Power Flow List or Bus View Display to obtain more information about a representative bus in the zone. You can also sort the zone records by clicking on the heading of the field by which you want to sort.

To show this display, click on Aggregations > Zones in the model explorer.

 

The display contains the following fields by default:

Zone Number, Zone Name

Zone’s number, between 1 and 9999, and its alphanumeric identifier. Simulator supports names of any character length. However, when writing out names to file formats with limitations on name length, the zone names will be truncated at their maximum supported length.

Load MW, Load MVR

Total real and reactive power load in the zone.

Gen (MW), Gen (Mvar)

Total real and reactive power generation in the zone.

Loss MW, Loss MVR

Total real and reactive power loss in the zone. Losses are computed by summing the losses of the individual transmission lines and transformers in the zone. Because of shunt charging, these devices can also generate reactive power. Therefore, reactive power losses may actually be negative.

Losses for tie-lines between zones are assigned to the zone in which the terminal bus that is NOT the metered bus is contained. The Metered End field for a branch determines which of the terminals is metered.

Int MW, Int Mvar

Net interchange of real and reactive power with all other zones. Exported power is assumed to be positive.

Load Mult MW

Shows the current load MW multiplier for the zone. All load in the area is scaled by this multiplier.