Q21) A 5-k VA, 220-V, Y-connected, three-phase, salient-pole synchronous generator is used to supply power to a unity pf load. By means of a slip test, the direct-axis synchronous reactance is found to be 122 and the quadrature-axis synchronous reactance 792. Assume that rated current is delivered to the load at rated voltage and that armature resistance is negligible. (a) Compute the corresponding value of the excitation voltage. (b) What is the value of the internal phase displacement angle Y. What is the value of the power angle? (d) Draw a carefully labeled phasor diagram.

Q21) A 5-k VA, 220-V, Y-connected, three-phase, salient-pole synchronous generator is used to supply power to a unity pf load. By means of a slip test, the direct-axis synchronous reactance is found to be 122 and the quadrature-axis synchronous reactance 792. Assume that rated current is delivered to the load at rated voltage and that armature resistance is negligible. (a) Compute the corresponding value of the excitation voltage. (b) What is the value of the internal phase displacement angle Y. What is the value of the power angle? (d) Draw a carefully labeled phasor diagram.

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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Subject:machines topic: synchronous machines
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