OPF Example - Marginal Costs

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Using the OPF solution from the previous page, select Optimal Power Flow > Results > Buses in the Model Explorer to view the bus marginal costs and Optimal Power Flow > Results > Areas in the Model Explorer to view the area marginal costs. The results should be as shown below.

 

Seven Bus Case Bus Marginal Costs

 

Seven Bus Case Area Marginal Costs

Note that the marginal costs for all the buses in an area are identical to the area's MW marginal cost. This is the expected result for systems without any line congestion. The area MW marginal costs are not identical. This is because currently each area is independently enforcing its own MW interchange. In the next example we'll jointly dispatch the three areas by combining them into a single super area.