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A 287 -MVA, 115 -kV, 0.9-PF-lagging, 50-Hz, two-pole, del-connected synchronous generator has a per unit synchronous reactance of 1.8 and a per-unit armature resistance of 0.711 (a) What are its synchronous reactance and armature resistance in ohms? (b) What is the magnitude of the internal generated voltage Ea at 125% rated condition (c) Find torque angle ô at these conditions? (d) Draw vector diagram for this circuit. (e) Ignoring losses in this generator, what torque must be applied to its shaft by the prime mover at 150% of full load? O If the field current is held constant, what is the maximum power possible out of this generator? Page 2 of 2 361 words D'Focus 国 目 100%

A 287 -MVA, 115 -kV, 0.9-PF-lagging, 50-Hz, two-pole, del-connected synchronous generator has a per unit synchronous reactance of 1.8 and a per-unit armature resistance of 0.711 (a) What are its synchronous reactance and armature resistance in ohms? (b) What is the magnitude of the internal generated voltage Ea at 125% rated condition (c) Find torque angle ô at these conditions? (d) Draw vector diagram for this circuit. (e) Ignoring losses in this generator, what torque must be applied to its shaft by the prime mover at 150% of full load? O If the field current is held constant, what is the maximum power possible out of this generator? Page 2 of 2 361 words D'Focus 国 目 100%

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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A 287 -MVA, 115 -kV, 0.9-PF-lagging, 50-Hz, two-pole, del-connected synchronous generator has a per unit synchronous reactance of 1.8 and a per-unit armature resistance of 0.711 (a) What are its synchronous reactance and armature resistance in ohms? (b) What is the magnitude of the internal generated voltage Ea at 125% rated condition (c) Find torque angle ô at these conditions? (d) Draw vector diagram for this circuit. (e) Ignoring losses in this generator, what torque must be applied to its shaft by the prime mover at 150% of full load? O If the field current is held constant, what is the maximum power possible out of this generator? Page 2 of 2 361 words D'Focus 国 目 100%
Transcribed Image Text:A 287 -MVA, 115 -kV, 0.9-PF-lagging, 50-Hz, two-pole, del-connected synchronous generator has a per unit synchronous reactance of 1.8 and a per-unit armature resistance of 0.711 (a) What are its synchronous reactance and armature resistance in ohms? (b) What is the magnitude of the internal generated voltage Ea at 125% rated condition (c) Find torque angle ô at these conditions? (d) Draw vector diagram for this circuit. (e) Ignoring losses in this generator, what torque must be applied to its shaft by the prime mover at 150% of full load? O If the field current is held constant, what is the maximum power possible out of this generator? Page 2 of 2 361 words D'Focus 国 目 100%
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