Power Transformers - Principles and Applications - J. Winders (Marcel Dekker, 2002) WW.pdf - Najnowsze ksiazki(48) - walbo48

Power

Transformers

Principles and Applications

John J. Winders, Jr.

PPL Electric Utilities

Allentown, Pennsylvania

MARCEL DEKKER, INC.

NEW YORK • BASEL

ISBN: 0-8247-0766-4

This book is printed on acid-free paper.

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The publisher offers discounts on this book when ordered in bulk quantities. For more

information, write to Special Sales/Professional Marketing at the headquarters address

above.

Neither this book nor any part may be reproduced or transmitted in any form or by

any means, electronic or mechanical, including photocopying, microﬁlming, and re-

cording, or by any information storage and retrieval system, without permission in

writing from the publisher.

Current printing (last digit):

10987654321

PRINTED IN THE UNITED STATES OF AMERICA

Series Introduction

Power engineering is the oldest and most traditional of the various areas within

electrical engineering, yet no other facet of modern technology is currently

experiencing a greater transformation or seeing more attention and interest

from the public and government. But while public concern and political deci-

sions about de-regulation and energy trading may reshape the electric utility

industry’s manner of doing business, its future like its past rests on the capabil-

ity of its transmission and distribution systems to convey safe, reliable, and

economical electric power to homes, businesses, and factories. Nothing is

more essential to this performance than the transformer, which enables modern

power and industrial systems to function.

I am particularly delighted to see this latest addition to Marcel Dekker’s

Power Engineering series. Power Transformers: Principles and Applications

is a comprehensive compendium of theory and practices for electric power

transformers. This book provides a concise but thorough treatment of basic

transformer theory, its application to various types of transformer designs and

their application in utility and industrial power systems. Its easy to read style

and linear organization make it particularly suitable as a tutorial for those who

need to learn the material independently, outside of the classroom, or as a text

for formal courses. This book also makes a very good practical reference for

utility and industrial power engineers.

In addition to having concise summaries of all the basics, the text pro-

vides an excellent description of the various ancillary equipment and systems,

which are often the most difﬁcult to precisely engineer and ﬁt into the system.

John Winders has also provided excellent coverage of how to read, interpret,

and apply a power transformer’s nameplate data, not always a straightforward

or unambiguous task and one where a surprising number of mistakes are made

by inexperienced engineers. Chapter 8 will be particularly useful to practicing

engineers and power system operators, covering maintenance needs, testing

options, and troubleshooting techniques and their use, and discussing reliabil-

ity of transformers.

As the editor of the Power Engineering series, I am proud to include

Power Transformers: Principles and Applications among this important group

of books. Like all the books in Marcel Dekker’s Power Engineering series,

this book provides modern power technology in a context of proven, practical

application, useful as a reference book as well as for self-study and advanced

classroom use. Marcel Dekker’s Power Engineering series includes books cov-

ering the entire ﬁeld of power engineering, in all of its specialties and sub-

genres, each aimed at providing practicing power engineers with the knowl-

edge and techniques they need to meet the electric industry’s challenges in

the 21st century.

H. Lee Willis

Preface

This book is based on notes for the Transformer Applications Course offered

by the Center for Power System Study at Lehigh University. The key word

in both the title of that course and the title of this book is applications . The

material presented in the following chapters was obtained from various

sources: textbooks, industry standards, and established utility practices and

procedures. Much of this material also comes from my personal ﬁles relating

to actual events and case studies that were observed during my career in the

utility industry spanning 30 years.

There are many kinds of transformers, and all share the same set of

fundamental operating principles. Since this book focuses on power transform-

ers, it is fair to ask, ‘‘What exactly is a power transformer?’’ By deﬁnition,

a power transformer is a transformer which transfers electric energy in any

part of the circuit between the generator and the distribution primary circuits.*

This deﬁnition of power transformer in the IEEE standard appears under the

* IEEE Std. C57.12.80-1978. IEEE Standard Terminology for Power and Distribution Transform-

ers. Institute of Electrical and Electronics Engineers, Inc., 1978, New York, p. 8.

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