Research Article
Available Transfer Capability Calculation Constrained with Small-Signal Stability Based on Adaptive Gradient Sampling
Table 3
Efficiency comparison of the IEEE 118-bus system.
| | Serial computing | Parallel computing for SQP-AGS | SQP-GS method | SQP-AGS method | Two cores | Four cores | Eight cores |
| Total time (s) | 173.48 | 66.29 | 39.88 | 25.15 | 16.36 | Gradient sampling time (s) | 170.40 | 63.32 | 36.90 | 20.24 | 13.37 | QP solver time (s) | 2.78 | 2.67 | 2.68 | 2.62 | 2.69 | Others’ time (s) | 0.30 | 0.30 | 0.30 | 0.29 | 0.30 | Speedup ratio, | — | — | 1.71 | 2.86 | 4.05 | Efficiency, | — | — | 0.86 | 0.72 | 0.51 | Iteration | 18 | 17 | 17 | 17 | 17 |
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