A 25 MVA, 13.2 kV alternator with solidly grounded neutral has a subtransient reactance of 0.40 p.u. The negative and zero sequence reactances are 0.20 and 0.3 p.u. respectively. Find the fault current when, (i) A single line to ground fault occurs at the terminals of an unloaded alternator and (ii) ALL fault occurs.

A 25 MVA, 13.2 kV alternator with solidly grounded neutral has a subtransient reactance of 0.40 p.u. The negative and zero sequence reactances are 0.20 and 0.3 p.u. respectively. Find the fault current when, (i) A single line to ground fault occurs at the terminals of an unloaded alternator and (ii) ALL fault occurs.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.35P: Consider a bank of this single-phase two-winding transformers whose high-voltage terminals are...

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