| Units: | MW |
| Mode: | Input Only |
| Multi-band: | False |
| Default Value: | 0 |
| Validation Rule: | ≥0 |
| Key Property: | No |
| Description: | Generation at time zero |
Generator Initial Generation sets the initial (t=0) dispatch state of the facility. It is used to initialize constraints such as Max Ramp Up, Max Ramp Down, Min Up Time, Min Down Time, Max Up Time, and Max Down Time. This property is combined with Initial Units Generating and Initial Hours Up or Initial Hours Down when enforcing minimum/maximum up and down time constraints. If you omit Initial Units Generating then it is assumed that, if initial generation is non-zero, all available units are running, otherwise if Initial Generation is zero then all units are off at t=0.
If Initial Generation is not defined then the initial dispatch state is freely optimized i.e. a value is determined by the optimization that minimizes the impact of the initial conditions on the overall system cost.
| Property | Value | Units |
| Units | 1 | - |
| Max Capacity | 500 | MW |
| Min Stable Level | 120 | MW |
| Max Ramp Up | 2 | MW/min |
| Max Ramp Down | 2 | MW/min |
| Initial Generation | 350 | MW |
| Initial Units Generating | 1 | - |
| Initial Hours Up | 6 | h |
| Initial Hours Down | 0 | h |
| Min Up Time | 18 | h |
| Min Down Time | 12 | h |
In the example in Table 1 the operating state at t=0 is one
unit operating at 500 MW. Because the maximum ramp is 2 MW/min. the
unit can reach a maximum of 470 MW (350 + 2 x 60) or minimum of 230 MW
(350 - 2 x 60) in the first hour. Additionally, the unit has been up
for six hours and must continue operating for a further 12 to meet the
minimum up time.