Answered: A 13.8 kV, 50-MVA, 0.9 p.f., 60 Hz,…

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

SYNCHRONOUS GENERATOR

A 13.8 kV, 50-MVA, 0.9 p.f., 60 Hz, four pole, Y-connected synchronous generator has a synchronous reactance of 2.5 ohms, and an armature resistance of 0.2 ohm. At 60 Hz, its friction and windage losses are 1 MW, and its core losses are 1.5 MW. The field circuit has a dc voltage of 120 V, and the maximum field current is 5A. The current of the field circuit is adjustable over the range from 0 to 10 A. The OCC of this generator is shown in the figure.

What will the terminal voltage of this generator be if it is connected to a delta-
connected with an impedance of 24 cis 25 deg ohms? *
Open-cireuit characteristie
20
18
16
14
12
10
3
4
5
6.
7
9
10
Field curent (A)
00
2.
2.
Open-circuit voltage (kV)

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