10.8 A 1.2 MVA, 6.6 kV, 3-phase, star-connected Alternator with a resistance of 0.4 and Synchronous reactance of 6 2 per phase delivers full load current at 0.8 pf lagging and at rated voltage. Estimate the terminal voltage for the same excitation and load current at 0.8 pf leading. [Ans: 7.9 kV]

10.8 A 1.2 MVA, 6.6 kV, 3-phase, star-connected Alternator with a resistance of 0.4 and Synchronous reactance of 6 2 per phase delivers full load current at 0.8 pf lagging and at rated voltage. Estimate the terminal voltage for the same excitation and load current at 0.8 pf leading. [Ans: 7.9 kV]

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

Chapter7: Symmetrical Faults

Section: Chapter Questions

Problem 7.3MCQ: The amplitude of the sinusoidal symmetrical ac component of the three-phase short-circuit current of...

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Question

10.8 A 1.2 MVA, 6.6 kV, 3-phase, star-connected Alternator with a resistance of
0.4 and Synchronous reactance of 6 2 per phase delivers full load current at 0.8
pf lagging and at rated voltage. Estimate the terminal voltage for the same
excitation and load current at 0.8 pf leading. [Ans: 7.9 kV]

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