Chronological Method Column
Column Type = Text
This optional column governs how Aurora seeks to enforce the constraint in the chronological solution after the LDC solution has been solved. There are two options:
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Hourly Limit: This is the default method. The model uses a constraint in the chronological LP dispatch to limit the operation of the resources to match the allocation in the LDC solution. In general this approach should result in an annual chronological solution that adheres closer to the input limit than the Shadow Adder approach (below). These hourly limits may be relaxed if the dispatch would otherwise be infeasible, and so limits may be violated in extreme cases. It is recommended to use the switch Remove penalty adders from pricing when using the Hourly Limit setting.
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Shadow Adder: When this is selected, the model calculates a $/MWh shadow price adder that is used to adjust the dispatch cost of each resource in the constraint. This approach typically works well for constraints with a large number of resources participating in the constraint.
NOTE: This column is not used for long-term energy constraints, e.g. when Constraint Type contains "LT".
Chronological Method Column