Change Type Column
Column Type = Text
Use the Change Type column to specify input values for the daily study as absolute value, percent change or absolute change. Available Change Types are listed below by available Record Types.
NOTE: The Absolute Value change type is applied to all variables if this column is not in the table.
NOTE: No escalations are applied to the demand or fuel prices as input in these tables.
Fuel
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Absolute Value: The fuel price (or basis) in $/mmBTU for the day. This value overrides values in the Fuel table.
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Percent Change: The value is the percent change to the fuel value from the active fuel table.
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Absolute Change: The value is the change in $/mmBTU for the fuel price or basis for the day. Any fuel costs not defined in the daily data table will default to the standard fuel cost from the active fuel table. Thus, transportation and other items that do not change daily can be input in the standard fuel table and only fuels with daily changing prices need to be input in this table.
Demand
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Absolute Value: The data is the average demand for the day. Hourly demand factors from the demand hourly table for each day are applied to the average demand to obtain hourly demand. Those factors are normalized for the day to equal an average of one for the hours dispatched.
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Absolute Change: The value is the change in average MW to the average demand for the day.
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Percent Change: The value is the percent change in average MW to the average daily demand.
NOTE: If you select Demand as the Change Type, the Name column will contain a dropdown list of the zones defined in the Zone Name column of the Zone Definition table.
Resource
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Absolute Value: Only Absolute Value is allowed and the data in the Days columns is the availability for the resource for the day (as a fraction of input capacity). For example, a value of 0.5 will result in 50% availability. Any value in this field will override the forced outage and maintenance inputs .
NOTE: Resources can only have an absolute value for this column. Pumped storage unit outages are not eligible for use with the Daily Change table.
Hydro
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Percent Change: The data is the percent change to the hourly factor (as computed by Aurora hydro shaping logic and including the monthly and annual hydro factors).
NOTE: If Hydro is selected as the Change Type, the Name column will contain a dropdown list of the master areas as defined in the Areas table.
Link and Input Link
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Absolute Value: The data is the link capability in MW for the day.
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Percent Change: The value is the percent change to the link's capability for the year and with any monthly shaping.
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Absolute Change: The value is the change in link capability in MW for the day.
Portfolio Demand
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Percent Change: The percentage entered will adjust portfolio demand accordingly.
Change Type Column
