Use Ramp Rates
This option applies resource ramp rates in determining resource capabilities. Ramp rates affect the resource capacity available to dispatch in any given hour, making it a function of the resource output in the previous dispatch hour. Ramp rates are input as a percent using the Ramp Rate column of the Resources Table.
Typically, the ramp rate logic will be effective when the project file is set to dispatch for all hours of the study. Some hourly sampling is allowed as long as all days are included in the study, in which case the ramp rates will automatically be converted to match the sampling level. For example, when sampling Every Day, Every 2nd Hour a resource with a ramp rate of 20% per hour would ramp up its generation 40% between dispatch hours. One exception is when running sub-hourly, ramp rates will only be applied when running all hours.
NOTE: Generally, the ramp rate logic will affect market prices during shoulder hours when load is increasing.
NOTE: When using ramp rates with the Nodal Capability, the current hour’s constraints (maximum resource capability) will be based on the previous hour’s nodal output for each zonal resource that is mapped to one or more nodal generators.
Solution Settings
Use Ramp Rates