Constraint Segment Definition

This option is used for annual Constrained Dispatch studies and defines how the load duration curve (LDC) segments are configured.

The annual constraint logic groups together similar dispatch hours for each month into buckets in order to create a manageable problem size for the annual LP to solve. You will have to consider the constraints of your machine. You can also type in a numeric value.

Valid entries are listed below.  Each option averages data across the weeks of each month and gives the most differentiation based on hour of the week within the month.  

For example, to inform the LDC to create 24 unique groups, segmented by hour, enter the values 1 through 24 repeated seven times for the seven days in the in a weekly vector for each month.  Aurora will then assume that for a given month, hours with the same number are grouped together in the LDC calculations.  The operating characteristics such as load, resource costs, transmission limits, etc. will be averaged together across all hours within the same group for when solving the annual LP (e.g. data from hour 1 for all days would be averaged together, etc.).

Nested references (via the Time Series Annual and Time Series Monthly) are also allowed for this method. But again, as more distinct segments are used the constraint logic will be more precise but will also use more memory.

 NOTE: For information on how to specify a time series for a variable, see Entering a Time Series.

 Simulation Options

 Dispatch and Demand

 Constraint Segment Definition


For further assistance, please contact Aurora Support.

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