please answer fast ? (b) A 45MVA, 25kV, three-phase, 50HZ synchronous generator has a synchronousreactance of 8.2N per phase and a negligible resistance. The generator isdelivering rated power at a 0.90 power factor lagging at the rated terminal voltageto an infinite bus.(i)Calculate the excitation voltage E in each phase and the power angle 8.(ii) Compute the armature current when the driving torque is reduced until thegenerator is delivering 32MW with the excitation voltage held constant atthe value found in Q1(b)(i). (iii) Compute the armature current when the driving torque is adjusted until thegenerator is delivering 40MW with the excitation voltage is decreased to75% of the value found in Q1(b)(i).

It is given that: Voltage=VL=25 kVRating=S=45 MVAFrequency=f=50 HzSynchronous reactance=Xs=8.2…

A 45MVA, 25KV, three-phase, 50Hz synchronous generator has a synchronous reactance of 8.2N per phase and a negligible resistance. The generator is delivering rated power at a 0.90 power factor lagging at the rated terminal voltage to an infinite bus.

A 45MVA, 25KV, three-phase, 50Hz synchronous generator has a synchronous reactance of 8.2N per phase and a negligible resistance. The generator is delivering rated power at a 0.90 power factor lagging at the rated terminal voltage to an infinite bus.

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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Question

please answer fast ?

(b) A 45MVA, 25kV, three-phase, 50HZ synchronous generator has a synchronous
reactance of 8.2N per phase and a negligible resistance. The generator is
delivering rated power at a 0.90 power factor lagging at the rated terminal voltage
to an infinite bus.
(i)
Calculate the excitation voltage E in each phase and the power angle 8.
(ii) Compute the armature current when the driving torque is reduced until the
generator is delivering 32MW with the excitation voltage held constant at
the value found in Q1(b)(i).

(iii) Compute the armature current when the driving torque is adjusted until the
generator is delivering 40MW with the excitation voltage is decreased to
75% of the value found in Q1(b)(i).

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