Answer to Question #158930 in Electrical Engineering for Mina malik

Question #158930

The synchronous generator in Figure 7.3 is operating at rated MVA, 0.95 p.f.

lagging and at 5% above rated voltage when a bolted three-phase short cir-

cuit occurs at bus 1. Calculate the per-unit values of (a) subtransient fault

current; (b) subtransient generator and motor currents, neglecting prefault current; and (c) subtransient generator and motor currents including prefault

current.


1
Expert's answer
2021-02-01T09:25:49-0500

a) If = \frac{Vf}{2KK}

= i0.08Pu

b) Ig = -j7 Pu

c) Im = - j0.08 Pu


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