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22 Electrical power systems ± an overview
Fig 1.18 (continued )
1.08
1.06 Fault cleared
Ratio of actual to rated speed 1.02 Machine at bus 1 Machine at bus 2
1.04
1.00
0.98
0.96
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Time, sec
(b)
120
100 Machine at bus 2
Internal voltage angle, deg 80 Fault cleared
60
40
Machine at bus 1
20
0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
Time, sec
(c)
