Generator Cubic Cost Display

See Also

 

The Generator Cubic Cost Display presents detailed cost information for each generator in the case set to use a cubic cost model. The Generator Cubic Cost 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 generators. The Quick Power Flow List and Bus View Display tools are available for finding more information on the generator’s terminal bus. You can also sort the generator records by clicking on the heading of the field by which you want to sort. Additionally, you can choose to restrict the records shown by the Generator Cubic Cost Display according to the constraints of the area/zone/owner filters. Finally, you can use the local menu’s Insert and Delete options when the application is in Edit Mode to insert a new generator into the case or to delete an existing generator.

To show the generator cubic cost display, select Network > Generators > Cost Curves Cubic from the Model Explorer.

 

By default, the generator records display contains the following fields:

Number, Name

Number and name of bus to which the generator is attached.

Area Name of Gen

Name of the area to which the generator belongs. The generator can belong to an area which is different than the area of which its terminal bus is a member.

ID

Alphanumeric ID used to distinguish multiple generators at the same bus; ‘1’ by default.

Status

The Open / Closed status of the generator. This is a toggleable field.

AGC

Designates whether the generator’s real power output is governed by automatic generation control. If the AGC field is set to Yes, the generator is on automatic generation control (AGC). When a generator is on AGC, its real power output can be varied automatically. Usually the purpose for AGC is to keep the area interchange at a desired value. You can click on this field to toggle its value (except in Viewer). Please see Area Control for more details.

Gen MW

Current real power output of the generator.

IOA, IOB, IOC, IOD

Parameters used to model the cost characteristic of the generator. Please see Generator Cost Information for details. Please note that these values can be saved/loaded using the Generator Cost Data auxiliary file.

Fuel Cost

The fuel cost of the type of fuel for the generator.

Variable O&M

Operations and Maintenance costs for the generator.

Fuel Type

An informational field that can be set to the type of fuel the generator uses.

Unit Type

An informational field that can be set to reflect the type of unit the generator is, such as combined cycle, steam, hydro, etc.

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

Cost $/Hr

Operating cost for the generator in $/hr.

IC

Incremental cost to produce an additional MWh. This can be expressed as dC(Pgi)/dPgi, where C denotes the generator’s cost of operation in $/hr and Pgi expresses the current MW output of the unit. In a lossless system, the incremental dispatch is equal to the generator’s lambda value.

LossSens

Area loss sensitivity - This field is only calculated when the generator’s area is on economic dispatch control. This field specifies the incremental change in area losses if this generator were to produce one more MW, with the excess generation absorbed by the system slack. This may be expressed as ¶Ploss/¶Pgi. The loss sensitivity is used in calculating the generator’s lambda value for the economic dispatch activity.

Generator MW Marg. Cost

The marginal cost of the generator supplying an additional MW of power to the system.