Tuesday, December 29, 2009

High Voltage Engineering - Ebooks Free Download



C.L. Wadhwa., “High Voltage Engineering
New Age International | 2007 | ISBN: 8122418597, 812242323X | 312 pages | PDF | 3,7 MB

“High Voltage Engineering” has been written for the undergraduate students in Electrical
Engineering of Indian and foreign Universities as well as the practising electrical engineers.
The author developed interest in the field of High Voltage Engineering when he was a student at the Govt. Engineering College, Jabalpur. It used to be thrilling to observe large metal spheres flashing over, corona phenomenon on a wire placed along the axis of a cylinder and then recording the corona loss, controlling the wave shapes of impulse voltages etc. The author has taught the subject at the Delhi College of Engineering for quite a number of years and while preparing lecture notes he referred to some of the books and journals and some literature from the internationally famed manufacturers of High Voltage equipments e.g. Haefely, Tettex etc. Thelecture notes so prepared, thus, have a touch of both the class room requirements and a practising engineer’s requirements. In this edition, zeroth chapter on Electric Stress estimation and c ontrol has been added where in different methods viz. finite difference, finite element, charge simmulation method and surface charge simulation methods have been discussed per estimation of metric stresses in complex dielectric media and electrode configuration. a brief view of optimisation of electrode configuration is also given in this chapter.
Chapter 1 deals with the breakdown of gases, liquids, and solid materials. Even though it
has not been possible to explain the physical phenomenon associated with breakdown of
the materials, with accuracy and precisiveness, an attempt has been made to bring out
some of the theories advocated by researchers in this field in a simple lucid and organised
way. Chapters 2 and 3 discuss the generation of high d.c. and a.c. voltages and high impulse
voltages and currents. Some of the latest circuits have been discussed and rigorous mathematical
treatment of the circuit has been given to make the subject more interesting and
to make the student understand the subject better. Measurement of transient voltage and currents and high voltage and current require different skills and equipment as compared with common a.c. or d.c. voltages we normally come across. Chapter 4 discusses various techniques and circuits for measurement of such quantities. Chapter 5 deals into high voltage testing of electrical equipments like insulators, cables, transformers, circuit breakers etc.
The measurements using high voltage Schering bridge, transformer ratio arm bridge and
partial discharges yield information regarding the life expectancy and the long term stability
or otherwise of the insulating materials. These techniques have been discussed elaborately
in Chapter 6. These tests are very important both during design and operation of
the equipments. Electrical transients last for a very short duration but these play a very important role in the insulation design of power system. Chapter 7 takes a view of various types of transients in power system and suggests classical and more modern statistical methods of
coordinating the insulation requirements of various equipments of the system and the
devices required for protection of these equipments. In this edition of the book following articles have been added in chapter 1 of the book :
(i) Breakdown in SF6 gas and Vacuum. (ii) Insulating materials used in power apparatus.
(iii) Application of gases, liquid and solid insulating materials in different power apparatus.
A suitable number of problems have been solved to help understand the relevant theory.
At the end, a large number of multiple choice questions have been added to help the
reader to test himself. An extensive bibliography will help the reader to locate detailed
information on various topics of his interest.

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