1995

Digital Protection for Power Systems

Thu, 06 May 2021 14:07:37 GMT

Digital protection is based on the use of computers in power line relaying. Since the late 1960s, digital devices and techniques have been applied to almost all new protection schemes. Today the technology is moving towards standardised hardware platforms; at the software level, however, there remains a huge variety in approaches and protection algorithms.

This book gives a fairly detailed understanding of the principles and techniques underlying the application of digital technology and algorithms to protection. It avoids going into detail of specific products: up-to-date information on these is available from the manufacturers. Instead it aims to give the reader a thorough understanding of the generic problems of digital protection.

The text covers the mathematical basis of numerical techniques and relay algorithms, the basic elements of digital protection and the fundamentals underlying the commonest algorithmic forms, particularly as applied to line protection. It deals with the fundamentals of travelling-wave techniques and their application to transmission lines, and with digital differential protection of transformers and lines.

Analogue Optical Fibre Communications

Tue, 12 Jun 2018 01:13:24 GMT

One of the many problems facing designers of fibre systems is the basic question of how best to transmit analogue-sourced signals; either on dedicated point-to-point links or as part of mixed-mode traffic on a predominantly digital fibre service network. This book discusses the fundamental principles involved and describes a variety of techniques and applications. The chapters have been contributed by invited researchers with expertise in a range of areas and outline the latest methods and analytical approaches, components and systems.

The general topics covered include subcarrier multiplexing (SCM) and coherent techniques, transmissions of TV signals, soliton and pulse time modulation methods and performance assessment of subcarrier multiplexed optical systems. Specific technological and system component issues addressed include generation and delivery of millimetre-waves over fibre systems for mobile communications, tuned optical receivers for fibre SCM systems and optical fibre amplifiers, and wavelength division multiplexing (WDM).

Written by leading authorities in their fields, this graduate level text should be of interest to all scientists and engineers concerned with transmission of analogue-sourced information over fibre systems.

Power System Protection

Mon, 11 Jun 2018 23:54:04 GMT

The worldwide growth in demand for electricity has forced the pace of developments in electrical power system design to meet consumer needs for reliable, secure and cheap supplies. Power system protection, as a technology essential to high quality supply, is widely recognised as a specialism of growing and often critical importance, in which power system needs and technological progress have combined to result in rapid developments in policy and practice in recent years. In the United Kingdom, the need for appropriate training in power system protection was recognised in the early 1960s with the launch of a correspondence course from which these books emerged and have since developed designed to meet the needs of protection staff throughout the world.

The Electricity Training Association, in response to the important recent developments in the field of protection, have now commissioned an additional volume covering digital technology. The existing three volumes, of which this is the second, have been reviewed by leading authorities within the electricity supply industry and electrical manufacturing companies in the UK and, with the new fourth volume, the new edition gives a comprehensive and up-to-date treatment of the subject, covering theory, analytical and design principles, equipment design and application and protection management.

Power System Protection

Mon, 11 Jun 2018 23:53:31 GMT

Power System Protection

Mon, 11 Jun 2018 23:52:58 GMT

Power System Protection

Mon, 11 Jun 2018 23:52:25 GMT

Oscillator Design and Computer Simulation, 2nd Edition

Mon, 11 Jun 2018 22:35:35 GMT

This second edition of the number one guide to oscillator design presents a comprehensive, unified approach to oscillator design that can be used with a wide range of active devices and resonator types. Resonator types covered include: L-C, crystal, SAW, dielectric resonator, coaxial line, stripline and microstrip. This text covers modern CAD synthesis and analysis techniques and is valuable to experienced engineers as well as to those new to oscillator design. The books topics include: Analysis fundamentals, oscillator fundamentals, limiting and starting, biasing, noise, computer simulation and examples and case studies.

Approximate Boundary Conditions in Electromagnetics

Mon, 11 Jun 2018 22:04:51 GMT

Non-metallic materials and composites are now commonplace in modern vehicle construction, and the need to compute scattering and other electromagnetic phenomena in the presence of material structures has led to the development of new simulation techniques.

This book describes a variety of methods for the approximate simulation of material surfaces, and provides the first comprehensive treatment of boundary conditions in electromagnetics. The genesis and properties of impedance, resistive sheet, conductive sheet, generalised (or higher order) and absorbing (or non-reflecting) boundary conditions are discussed. Applications to diffraction by numerous canonical geometries and impedance (coated) structures are presented, and accuracy and uniqueness issues are also addressed, high frequency techniques such as the physical and geometrical theories of diffraction are introduced, and more than i 30 figures illustrate the results, many of which have not appeared previously in the literature.

Written by two of the authorities m the field, this graduate-level text should be of interest to all scientists and engineers concerned with the analytical and numerical solution of electromagnetic problems.

Neural Network Applications in Control

Mon, 11 Jun 2018 21:28:46 GMT

Neural networks are an exciting technology of growing importance in real industrial situations, particularly in control and systems. This book aims to give a detailed appreciation of the use of neural nets in these applications; it is aimed particularly at those with a control or systems background who wish to gain an insight into the technology in the context of real applications.

The book introduces a wide variety of network types, including Kohenen nets, n-tuple nets and radial basis function networks, as well as the more usual multi-layer perception back-propagation networks. It begins by describing the basic principles and some essential design features, then goes on to examine in depth several application studies illustrating a range of advanced approaches to the topic.

Adaptive Prediction and Predictive Control

Mon, 11 Jun 2018 21:05:58 GMT

Control often follows predictions: predictive control has been highly successful in producing robust and practical solutions in many real-life, real-time applications. Adaptive prediction covers a variety of ways of adding 'intelligence' to predictive control techniques. Many different groups, with widely varying disciplinary backgrounds and approaches, are tackling the same problem from different angles; these groups are sometimes unaware of alternative approaches from other disciplines.

This book attempts to give a unified and comprehensive coverage of the principles and methods that these groups have developed. It avoids basing its descriptions on very complex mathematical formulations but still gives a rigorous exposure to the subject, and illustrates the theory with many practical examples. It is chiefly aimed at students, researchers and practitioners, but will also be accessible to the non-specialist.