Research Article
Improved Harmony Search Algorithm to Compute the Underfrequency Load Shedding Parameters
Table 4
Optimal settings of UF-relays by using the PSO algorithm.
| | UF-relay | Stage 1 | Stage 2 | Stage 3 | | ∆P (%) | fs (Hz) | ∆P (%) | fs (Hz) | ∆P (%) | fs (Hz) |
| | Relay 1 | 22.67 | 59.30 | 5.07 | 59.09 | 50.00 | 58.59 | | Relay 2 | 33.28 | 59.38 | 42.37 | 58.99 | 23.87 | 58.79 | | Relay 3 | 7.53 | 59.49 | 1.00 | 59.26 | 28.56 | 58.97 |
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