 [bkeps.com]Frequency disturbances, transients, grounding, interference…the issues
related to power quality are many, and solutions to power quality
problems can be complex. However, by combining theory and practice to
develop a qualitative analysis of power quality, the issues become
relatively straightforward, and one can begin to find solutions to
power quality problems confronted in the real world. Power Quality
builds the foundation designers,
engineers, and technicians need to survive in the current power system
environment. It treats power system theory and power quality principles
as interdependent entities, and balances these with a wealth of
practical examples and data drawn from the author's 30 years of
experience in the design,
testing, and trouble-shooting of power systems. It compares different
power quality measurement instruments and details ways to correctly
interpret power quality data. It also presents alternative solutions to
power quality problems and compares them for feasibility and economic
viability. Power quality problems can have serious consequences, from
loss of productivity to loss of life, but they can be easily prevented.
You simply need a good understanding of electrical power quality and
its impact on the performance of power systems. By changing the domain
of power quality from one of theory to one of practice, this book
imparts that understanding and will develop your ability to effectively
measure, test, and resolve power quality problems.
The name of this book is
Power Quality,
but the title could very well be
The Power
Quality Do-It-Yourself Book
. When I set out to write this book, I wanted it to be
user friendly, easy to understand, and easy to apply in solving electrical
power system
problems that engineers and technicians confront on a daily basis. As an
electrical
engineer dealing with power system quality concerns, many of the books I
consulted
lacked direct and precise information and required a very thorough search to
find
what I needed. Very often, I would spend several hours pondering a case just so
the
theory I read and the practical findings would come together and make sense.
This
book is the product of my thought processes over many years. I have tried to
combine
the theory behind power quality with actual power quality cases which I have
been
involved with in order to create a book that I believe will be very useful and
demystify
the term
power quality
.
What is power quality? Power quality, as defined in this book, is “a set of
electrical
boundaries that allows equipment to function in its intended manner without
significant
loss of performance or life expectancy.” Conditions that provide satisfactory
performance at the expense of life expectancy or vice versa are not acceptable.
Why should power quality be a concern to facility designers, operators, and
occupants? When the quality of electrical power supplied to equipment is
deficient,
performance degradation results. This is true no matter if the equipment is a
computer
in a business environment, an ultrasonic imaging machine in a hospital, or a
process
controller in a manufacturing plant. Also, good power quality for one piece of
equipment may be unacceptable for another piece of equipment sitting right next
to
it and operating from the same power lines, and two identical pieces of
equipment
can react differently to the same
power quality due to production or componenttolerances. Some machines even
create their own power quality problems. Give such hostile conditions, it is important for an engineer entrusted with the
design or
operation of an office building, hospital, or a manufacturing plant to be
knowledgeable
about the basics of power quality.
This book is based on 30 years of personal experience in designing, testing,
and
troubleshooting electrical power systems and components, the last 9 of which
have
been spent exclusively studying and solving power quality problems for a wide
spectrum of power users. This book is not an assemblage of unexplained
equations
and statements. The majority of the information contained here is based on my
experiences in the power system and power quality fields. Mathematical
expressions
are used where needed because these are essential to explaining power quality
and
its effects. Throughout the book, several case examples are provided, the steps
used
to solve power quality problems are described in depth, and photographs,
illustrations,
and graphs are used to explain the various power quality issues. The examples
show
that many power quality problems that have resulted in loss of productivity,
loss of equipment, injury to personnel, and in some cases, loss of life could
easily have been
avoided. All that is needed to prevent such consequences is a clear
understanding of
electrical power quality and its effects on power system performance.
I hope the reader will enjoy reading this book as much as I enjoyed writing it.
Also, I hope the reader will find the book useful, as it is based on the
experiences
of an electrical engineer who has walked through the minefields of electrical
power
system quality and for the most part survived.
Download and disscus here
Tags: tối ưu hóa hệ thống điện Chất lượng điện năng_Power Quality by C. Sankaran Download gioi thieu sach . Tin liên quan Tin cũ hơn |
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