This Ancillary Max Offline Contribution column is used to specify the maximum contribution in MW that a given Commitment Resource can make to the Ancillary Products in which it participates when it is offline. It is only applicable to commitment resources and for ancillary products that have a Time Length greater than or equal to the unit’s Offline Ancillary Up Time.  If the field is not populated but the Ancillary Max Contribution column is populated, the latter is used. If neither of these two columns is populated, Aurora will limit offline ancillary contribution to the value of [Minimum Capacity] + ([Product Time Length] – [Offline Ancillary Up Time])*[Unit Ramp Rate in MW/Min]. If, in performing that calculation, the ramp rate is not specified, it will be assumed to be 100% capacity/hr.

When the resource participates in more than one ancillary product, the entry should be a comma-delimited list with the same products entered in the same order as in the Ancillary Services input column for that resource. If an entry is found for at least one product but not for all products in which the unit participates, the entry for the last product specified will be used for all unspecified products.

 NOTE: Specify inputs for any time period (annually, monthly, weekly, hourly, or sub-hourly). For information on specifying a variable's time series, see Entering a Time Series.