See Also
The Super Area Information Dialog displays information pertaining to Super Area Display. It summarizes the super area's real and reactive load and generation, scheduled transactions, and constituent areas. It also allows you to manage the list of areas to include in the super area and to designate how its generation should be controlled. To display the Super Area Information Dialog, right-click on the Super Area Records Display and select Show Dialog from the resulting local menu.
The Super Area Information Dialog has the following fields:
Area in Super Area
Name
The list of all super areas that have been defined in the case are listed in this dropdown box. Select one of the super areas to display its information, or type a new name in the box and click Add New to define a new super area.
Rename
Click this button to change the name of the super area specified in the Name field.
Save
Saves the super area of the name specified in the list of super areas.
Delete
Click this button to delete the super area specified in the Name field.
Area in Super Area
Areas in Super Area
Lists the areas contained in the super area. Right-click on a row and select Remove to remove the area from the super area.
Super Area Control Options
Specify the type of generation control to employ for the super area. The super area may be removed from area control or employ Participation Factor or Economic Dispatch control. See Area Control for details on these types of generation control.
An additional type of control available to Super Areas is to Use Area Participation Factors. If the super area is set to participation factor control, and this option is NOT checked, then the generators within the super area respond by redispatching to meet the entire super area generation change based on their own participation factors.
However, if this option IS checked, then an additional level of participation control complexity is added for the super area. First, the total super area generation change is divided across each area forming the super area, according to the participation factors of the AREAS, as set in the grid on this dialog. Once the total generation change has been determined for each area within the super area, then the generators within each individual area are dispatched using area participation factor control to meet each specific area's determined generation change.
Use Area Participation Factors
If the super area control is set to Participation Factor control, you can specify participation factors for each area in the list of areas that indicate how each area should contribute towards changes in generation for the super area. For example, if you have three areas in the super area and you set the participation factors to 1, 1 and 2, the three areas will contribute to the total change in generation in the super area by ratios of 25%, 25%, and 50%, respectively. The contribution of each area is then further divided among the generators within each area by the participation factors of the individual generators.
This option will be applied when calculating TLR, PTDF, voltage, and ATC sensitivities. When calculating these sensitivities, the assumption is that the super area is on participation factor control even if the control method is something other than this. If this option is selected, it will be enforced regardless of the control method when calculating these sensitivities.
New Area Name
Use the dropdown box to select an area to add to the super area. Click the Add New Area by Name to add the selected area to the super area.
New Area #'s
Enter in a list of area numbers separated with dashes or commas and click Add New Areas by Number button to add the areas to the Super Area
Summary Information
ACE Total (MW)
The total area control error for the super area. It is calculated by summing the ACE for all areas comprising the super area.
ACE Tolerance (MW)
The Area Control Error tolerance observed for the super area during a load flow solution.
Total Scheduled Transactions
Lists the total scheduled import or export for the super area. It is computed by summing the scheduled interchange for all areas comprising the super area. Exports are positive.
Lambda
Hourly Cost
Current average hourly cost for the super area in $/hour.
Load, Generation, Shunts, Losses, Interchange
The Load and Generation section of the Super Area Information Dialog accounts for the real and reactive power flows into, out of, and within the super area. Each quantity is computed by summing over the areas comprising the super area.
The OPF Tab contains information regarding the Optimal Power Flow (OPF) solution data for a super area. It houses the following information:
Average LMP for Area
The computed average locational marginal price of all buses contained in the area.
LMP Standard Deviation
The standard deviation of the locational marginal price for all buses contained in the area.
Min/Max LMP
The minimum and maximum locational marginal price of all the buses in the area.
Total Generator Production Cost (Scaled)
The scaled cost includes the Cost Shift and Cost Multiplier. These two values can be defined for each generator, and allow the user a way to assess changes to the LMP results when a generators cost or "bid" is modified, without actually changing the original generator cost or bid curve. The scaled cost function for each generator is equal to:
(original cost function + cost shift) * cost multiplier
Total Generator Unscaled Production Cost
The total unscaled generator production cost, based on the original generator cost or bid curves.
Total Generator LMP Profit
The profit of the generators in the area based on the Locational Marginal Prices (LMPs) determined by the OPF solution. The profit is determined as:
LMP Price * MW Output – Unscaled Cost Function
Cost of Energy, Loss, and Congestion Reference
Specify a reference for determining the cost of energy, loss and congestion. The choices are Existing loss sensitivies directly, Area’s Bus’ Loads, Injection Group, or a specific bus.
Custom
This page of the dialog can be used to enter notes about the super area. Any information entered in the memo box will be stored with the case when the case is saved to a PWB file. Custom fields can also be entered on this page in the form of floating point, integer, and string fields. These custom fields are stored with the super area and can be used for various tasks in Simulator.