Can Drop Column
Column Type = Text/Boolean
The Can Drop column allows the user to restrict the retirement of a unit during a long-term capacity expansion run. This column can be input with a flag of FUEL, "0", "1", a year (i.e. "2009") or a Boolean (i.e. "TRUE" or "FALSE").
If a "0" or "FALSE" is entered for this variable, the resource cannot be considered for long-term economic retirement. Note: If a retirement date is specified for a resource and the Can Drop flag is set to "0" the resource will retire from the system on the date specified.
If a "1" or "TRUE" is input, the resource can be considered for economic retirement at any time during a long-term capacity expansion study.
If a year is entered for this variable, i.e. "2009", the model will not consider the resource for economic retirement prior to the year specified. Note: Entering a specific year as input allows the model to consider this resource for economic retirement in the year specified or later.
NOTE: The Long-Term Optimization Logic may consider a resource economic after the assigned retirement date, in which case the retirement date may be extended past the assigned retirement year, similarly an uneconomic resource may be considered for retirement prior to the assigned retirement year.
NOTE: The "Can Drop" feature should not be used in conjunction with the "Resource Fixed" feature. If the "Can Drop" column is selected the Resource Fixed column should remain blank. Both the "Can Drop" and "Resource Fixed" options allow the user to limit the economic retirement of resources within the system. Selecting both options in the Resources or Fuel tables will produce a warning message in the Status Window.
NOTE: If the FUEL reference is specified for this variable the value in the Fuel table will be applied.
Can Drop Column
