A three-phase, 2000-kVA, 12-kV, 1800-rpm synchronous generator has a synchronous reactance of 20 ohms per phase and negligible armature resistance.
a. The field current is adjusted to obtain the rated terminal voltage at open circuit. Determine the excitation voltage.
b . A short circuit occurs across the machine terminals. Find the stator current.
c. The synchronous machine is connected to an infinite bus. The generator delivers rated current at 0.8 PF lagging. Determine the excitation voltage.
d. Calculate the maximum power the synchronous machine can deliver fro the excitation current.