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a delta connected, round rotor 3-phase synchronous generator with mains phase voltage V1L= 400 V: Ef= 2*V1, Ra negligible, Xs=10 Ohm, Mechanical losses negligible, current value of load angle is 20 degrees (initial case) . The machine works in parallel with the mains. In the new case, the generator's driving torque is being modified. Keeping the above given, the new value of the load angle becomes 3 times its initial value. Which of the following is the ratio of the generator driving torque in the new state to the driving torque in the original state? a) 0.395 b) 2.532 c) 4.596 d) -1.815 e) 4.386 f) -0.605 g) 7.596

a delta connected, round rotor 3-phase synchronous generator with mains phase voltage V1L= 400 V: Ef= 2*V1, Ra negligible, Xs=10 Ohm, Mechanical losses negligible, current value of load angle is 20 degrees (initial case) . The machine works in parallel with the mains. In the new case, the generator's driving torque is being modified. Keeping the above given, the new value of the load angle becomes 3 times its initial value. Which of the following is the ratio of the generator driving torque in the new state to the driving torque in the original state? a) 0.395 b) 2.532 c) 4.596 d) -1.815 e) 4.386 f) -0.605 g) 7.596

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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In a delta connected, round rotor 3-phase synchronous generator with mains phase voltage V1L= 400 V: Ef= 2*V1, Ra negligible, Xs=10 Ohm, Mechanical losses negligible, current value of load angle is 20 degrees (initial case) . The machine works in parallel with the mains.

In the new case, the generator's driving torque is being modified. Keeping the above given, the new value of the load angle becomes 3 times its initial value. Which of the following is the ratio of the generator driving torque in the new state to the driving torque in the original state?

a) 0.395

b) 2.532

c) 4.596

d) -1.815

e) 4.386

f) -0.605

g) 7.596

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