Calculate the synchronizing torque for one mechanical degree of phase displacement in a 6,000-kVA, 50-Hz, alternator when running at 1,500 r.p.m with a generated e.m.f. of 10,000 volt. The machine has a synchronous impedance of 25%. [544 kg.m] (Electrical Engineering-III, Madras Univ. April 1978; Osmania Univ. May 1976)

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
Chapter11: Transient Stability
Section: Chapter Questions
Problem 11.1P
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Calculate the synchronizing torque for one mechanical degree of phase displacement in a 6,000-kVA,
50-Hz, alternator when running at 1,500 r.p.m with a generated e.m.f. of 10,000 volt. The machine
has a synchronous impedance of 25%.
[544 kg.m] (Electrical Engineering-III, Madras Univ. April 1978; Osmania Univ. May 1976)
A 10,000-kVA, 6,600-V, 16-pole, 50-Hz, 3-phase alternator has a synchronous reactance of 15%.
Calculate the synchronous power per mechanical degree of phase displacement from the full load
position at power factor 0.8 lagging.
[10 MW] (Elect.Machines-I, Gwalior Univ. 1977)
Transcribed Image Text:Calculate the synchronizing torque for one mechanical degree of phase displacement in a 6,000-kVA, 50-Hz, alternator when running at 1,500 r.p.m with a generated e.m.f. of 10,000 volt. The machine has a synchronous impedance of 25%. [544 kg.m] (Electrical Engineering-III, Madras Univ. April 1978; Osmania Univ. May 1976) A 10,000-kVA, 6,600-V, 16-pole, 50-Hz, 3-phase alternator has a synchronous reactance of 15%. Calculate the synchronous power per mechanical degree of phase displacement from the full load position at power factor 0.8 lagging. [10 MW] (Elect.Machines-I, Gwalior Univ. 1977)
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