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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

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.16P: A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and...

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Question

A 1200 kVA, 3.3-kV, three-phase, star-connected alternator has an effective
resistance that is 1.5 times the dc resistance. The dc resistance is obtained by connecting two terminals to a dc source. The current and voltage are 87.6 A and 6 V, respectively. A field current of 35 A produces a current of 200 A on short-circuit and 1.1 kV on open circuit. Calculate the % change in magnitude of terminal voltage when the full-load of 1200 kVA at 0.9 pf lagging is thrown off.

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