OPF Load Records
Displays OPF specific information about each load record with a valid area/zone/owner filter. To show this display select Optimal Power Flow > Results > Loads in the Model Explorer. The OPF Load Records Display is a class of Case Information Display and therefore can be used in a manner consistent with the other case information displays. Specific formatting options are available from the local menu, which can be accessed by right-clicking on any field in the display.
By default the display contains the following fields:
Number, Name
Number and name of the bus to which the load is attached. The display's local menu offers you the opportunity to view the Quick Power Flow List and the Bus View Display for this bus. You can also use the local menu to view the generator's dialog.
ID
Alphanumeric ID used to distinguish multiple loads at the same bus.
Area Name of Load
Name of the load’s area.
AGC
Designates whether the load’s real power demand is governed by automatic generation control (AGC). If the AGC field is set to Yes the load is on AGC in the standard power flow. When a load is on AGC its real power output is varied automatically during an OPF or SCOPF solution ONLY, provided the load is part of an area or super area that is also on OPF control. Loads will not be dispatched if the area is on some other form of AGC control.
In Simulator OPF the default operating mode is that only loads on AGC control are eligible to be OPF controls. In addition, the load’s area or super area must have AGC Status of "OPF", and the area must have its Load MW Dispatch set to YES.
MW
The real power output of the load.
Cost Shift $/MWh, Cost Multiplier
The cost shift and cost multiplier allow you to easily apply a shift to the cost function for the purpose of assessing how variations in bids impact profit. The cost function is affected based on the following equation:
(Original Cost Function + Cost Shift) * Cost Multiplier
Hourly Benefit
The total benefit of the load, including the impact of the cost shift and cost multiplier.
MW Marg. Cost
Tells the marginal cost, in $ / MWhr, to reduce one additional MW of load at this bus. If a load is available as a control and is not at either its minimum or maximum limit or a cost model breakpoint, then the MW Marg. Cost field will be identical to the load’s current marginal cost. However the usual case is for the load to be at either a limit or a cost model breakpoint so the usual situation is that the MW Marg. Cost field value IS NOT equal to the load’s marginal cost.
Inc. Benefit
Incremental benefit of the load at it’s current operating point.
Initial MW
The initial real power demand of the load at the beginning of the OPF solution.
Initial Cost
The initial load cost at the beginning of the OPF solution.
Delta MW
Change in the load's real power output as a result of the OPF.
Delta Cost
Change in the load's cost as a result of the OPF.
Min MW, Max MW
Minimum and maximum real power demand of the load.
# of Benefit Curve Points
Shows the number of segments in the piecewise linear model. If no piecewise linear model exists then this field is zero.
Profit $/hr
Shows the profit of the load.