Why does the short-circuit point occur near the generator, and why is it possible that the two-phase short-circuit current is greater than the three-phase short-circuit current?
Typically, the three-phase short-circuit current is maximum when the short-circuit point occurs near the generator
The two-phase short-circuit current may be greater than the three-phase short-circuit current; when the short-circuit point is close to the neutral point grounding transformer
The single-phase short-circuit current may also be greater than the three-phase short-circuit current. It is recommended to read "industrial and Ming Yong power distribution design manual" in the fourth chapter, devoted to short-circuit current calculation.
The reactance per unit value is bounded by 0.6 short distance power is close, because the three-phase short-circuit short-circuit phase generator armature reaction is demagnetization strong, three-phase short-circuit voltage drop is serious, so the steady current is greater than the three-phase short circuit phase.
