Table 5.
Scheduling results for WOA and NSGA II with and without ON/OFF strategy
| Parameter | Whale optimisation algorithm (WOA) | NSGA II | ||||
|---|---|---|---|---|---|---|
| Without an ON/OFF strategy | With an ON/OFF strategy | Optimality gap (%) | Without an ON/OFF strategy | With an ON/OFF strategy | Optimality gap (%) | |
| Running time of the algorithm (sec.) | 12.42 | 13.12 | 5.64 | 14.26 | 15.23 | 6.80 |
| Cmax (min.) | 3200 | 3200 | 0 | 3420 | 3420 | 0 |
| TEC (kWh.) | 294.68 | 232.13 | − 20.41 | 316.18 | 278.91 | 11.79 |
| Total energy cost ($) | 21.39 | 16.85 | − 21.23 | 22.95 | 20.25 | 11.79 |
| TCE (tonCO2) | 0.23 | 0.18 | − 21.23 | 0.25 | 0.22 | 11.79 |
| Carbon tax ($) | 7.75 | 6.10 | − 21.23 | 8.31 | 7.33 | 11.79 |
| Carbon trading ($) | − 3.89 | − 6.35 | − 63.08 | − 2.41 | − 4.62 | 91.70 |
| Overall cost ($) | 25.25 | 16.6 | 34.26 | 28.85 | 22.96 | 20.42 |