30、A three-phase, 318.75kVA, 2300V alternator has an armature resistance of 0.35
Ω/ phase
and a synchronous reactance of 1.2
Ω/ phase
. Please determine the voltage regulation at
full-load kVA, 0.5 power factor leading, and rated voltage.
(A) 1.55% (B) 3.22% (C) 6.12% (D) -5.11%