Protective Relay Principles
Protective Relay Principles

Author: Anthony M. Sleva

Publisher: CRC Press

Published: 2018-09-03

Total Pages: 368

ISBN-13: 142001417X

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Improve Failure Detection and Optimize Protection In the ever-evolving field of protective relay technology, an engineer’s personal preference and professional judgment are as important to power system protection as the physical relays used to detect and isolate abnormal conditions. Invaluable Insights from an Experienced Expert Protective Relay Principles focuses on probable power system failure modes and the important characteristics of the protective relays used to detect these postulated failures. The book presents useful new concepts in a way that is easier to understand because they are equally relevant to older, electromechanical and solid-state relays, and newer, more versatile microprocessor-based relays. It introduces the applications, considerations, and setting philosophies used in transmission-line, distribution-line, and substation applications, covering concepts associated with general system operations and fault detection. Topics include relay load limits, cold load pickup, voltage recovery, and arc flash. The author also delves into the philosophies that engineers employ in both urban and rural areas, with a detailed consideration of setpoint function. Analysis of Key Concepts That Are Usually Just Glossed Over This versatile text is ideal for new engineers to use as a tutorial before they open the instruction manuals that accompany multi-function microprocessor-based relays. Guiding readers through the transient loading conditions that can result in relay misoperation, the author elaborates on concepts that are not generally discussed, but can be very helpful in specific applications. Readers will come away with an excellent grasp of important design considerations for working with overcurrent, over- and undervoltage, impedance, distance, and differential type relay functions, either individually or in combination. Also useful for students as a textbook, this book includes practical examples for many applications, and offers guidance for more unusual ones.

Electric Relays
Electric Relays

Author: Vladimir Gurevich

Publisher: CRC Press

Published: 2018-10-03

Total Pages: 698

ISBN-13: 1420026410

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Electric relays pervade the electronics that dominate our world. They exist in many forms, fulfill many roles, and each have their own behavioral nuances and peculiarities. To date, there exists no comprehensive reference surveying the broad spectrum of electric relays, save one-Electric Relays: Principles and Applications. This ambitious work is not only unique in its scope, but also in its practical approach that focuses on the operational and functional aspects rather than on theory and mathematics. Accomplished engineer Dr. Vladimir Gurevich builds the presentation from first principles, unfolding the concepts and constructions via discussion of their historical development from the earliest ideas to modern technologies. He uses a show-not-tell approach that employs nearly 1300 illustrations and reveals valuable insight based on his extensive experience in the field. The book begins with the basic principles of relay construction and the major functional parts, such as contact and magnetic systems. Then, it devotes individual chapters to the various types of relays. The author describes the principles of function and construction for each type as well as features of several relays belonging to a type that operate on different principles. Remarkably thorough and uniquely practical, Electric Relays: Principles and Applications serves as the perfect introduction to the plethora of electric relays and offers a quick-reference guide for the experienced engineer.

Protective Relays Their Theory and Practice
Protective Relays Their Theory and Practice

Author: A.R. van C. Warrington

Publisher: Springer Science & Business Media

Published: 1977

Total Pages: 470

ISBN-13: 9780412153808

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This book should be of interest to electrical system protection engineers and postgraduate students.

Electrical Power Systems
Electrical Power Systems

Author: C L Wadhwa

Publisher: New Age International

Published: 2006

Total Pages: 918

ISBN-13: 9788122417739

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In A Clear And Systematic Manner, This Book Presents An Exhaustive Exposition Of The Various Dimensions Of Electrical Power Systems. Both Basic And Advanced Topics Have Been Thoroughly Explained And Illustrated Through Solved Examples.Salient Features * Fundamentals Of Power Systems, Line Constant Calculations And Performance Of Overhead Lines Have Been Discussed * Mechanical Design Of Lines, Hvdc Lines, Corona, Insulators And Insulated Cables Have Been Explained * Voltage Control, Neutral Grounding And Transients In Power Systems Explained * Fault Calculation, Protective Relays Including Digital Relays And Circuit Breakers Discussed In That Order * Power Systems Synchronous Stability And Voltage Stability Explained * Insulation Coordination And Over Voltage Protection Explained * Modern Topics Like Load Flows, Economic Load Dispatch, Load Frequency Control And Compensation In Power System Nicely Developed And Explained Using Flow Charts Wherever Required * Zbus Formulation, Power Transformers And Synchronous Machines As Power System Elements Highlighted * Large Number Of Solved Examples, Practice Problems And Multiple Choice Questions Included. Answers To Problems And Multiple-Choice Questions ProvidedWith All These Features, This Is An Invaluable Textbook For Undergraduate Electrical Engineering Students Of Indian And Foreign Universities. Amie, Gate, All Competitive Examination Candidates And Practising Engineers Would Also Find This Book Very Useful.

The Relay Testing Handbook #2D
The Relay Testing Handbook #2D

Author: Chris Werstiuk

Publisher: Valence Electrical Training Services LLC

Published: 2007-06

Total Pages: 90

ISBN-13: 1934348015

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As modern protective relays become increasingly more powerful and complex, many relay testers continue to use test procedures and philosophies that are based on previous generations of relays and their limitations. Modern relays have very different characteristics that require a different testing philosophy to ensure that they will operate when required. As the second of The Relay Testing Handbook series, Relay Testing Fundamentals builds on the electrical theory principles introduced in the first package, Electrical Fundamentals for Relay Testing. In this in-depth discussion of protective relays you will learn about the history of protective relaying including: Electromechanical relays Solid state relays Simple microprocessor relays Multifunction microprocessor relays Relay testers of all skill levels can benefit from a solid foundation of relay testing fundamentals; the foundational elements included in this book include: Reasons for relay testing Essential relay testing equipment The importance of using different test techniques for various relay generations Traditional test procedures for element testing Logic and dynamic testing Combining test techniques for more efficient and effective relay testing Applying test techniques that take advantage of modern test equipment and software This book is included in the hardcover book The Relay Testing Handbook: Principles and Practice, or it can be ordered by itself as a soft-cover book, Adobe Acrobat PDF digital download, or both. Paperback: 86 pages Trim Size: 8.5"x11" Publisher: Valence Electrical Training Services LLC Language: English ISBN-13: 978-1-934348-05-5 LCCN: 2012934618

Transmission and Distribution Electrical Engineering
Transmission and Distribution Electrical Engineering

Author: Colin Bayliss

Publisher: Elsevier

Published: 2006-12-18

Total Pages: 1039

ISBN-13: 0080468136

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Dramatic power outages in North America, and the threat of a similar crisis in Europe, have made the planning and maintenance of the electrical power grid a newsworthy topic.Most books on transmission and distribution electrical engineering are student texts that focus on theory, brief overviews, or specialized monographs. Colin Bayliss and Brian Hardy have produced a unique and comprehensive handbook aimed squarely at the engineers and planners involved in all aspects of getting electricity from the power plant to the user via the power grid. The resulting book is an essential read, and a hard-working reference for all engineers, technicians, managers and planners involved in electricity utilities, and related areas such as generation, and industrial electricity usage.* An essential read and hard*working ref

Physical-Layer Security for Cooperative Relay Networks
Physical-Layer Security for Cooperative Relay Networks

Author: Yulong Zou

Publisher: Springer

Published: 2016-04-20

Total Pages: 110

ISBN-13: 3319311743

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This book presents physical-layer security as a promising paradigm for achieving the information-theoretic secrecy required for wireless networks. It explains how wireless networks are extremely vulnerable to eavesdropping attacks and discusses a range of security techniques including information-theoretic security, artificial noise aided security, security-oriented beamforming, and diversity assisted security approaches. It also provides an overview of the cooperative relaying methods for wireless networks such as orthogonal relaying, non-orthogonal relaying, and relay selection.Chapters explore the relay-selection designs for improving wireless secrecy against eavesdropping in time-varying fading environments and a joint relay and jammer selection for wireless physical-layer security, where a relay is used to assist the transmission from the source to destination and a friendly jammer is employed to transmit an artificial noise for confusing the eavesdropper. Additionally, the security-reliability tradeoff (SRT) is mathematically characterized for wireless communications and two main relay-selection schemes, the single-relay and multi-relay selection, are devised for the wireless SRT improvement. In the single-relay selection, only the single best relay is chosen for assisting the wireless transmission, while the multi-relay selection invokes multiple relays for simultaneously forwarding the source transmission to the destination.Physical-Layer Security for Cooperative Relay Networks is designed for researchers and professionals working with networking or wireless security. Advanced-level students interested in networks, wireless, or privacy will also find this book a useful resource.

Localization and Posture Recognition via Magneto-Inductive and Relay-Aided Sensor Networks
Localization and Posture Recognition via Magneto-Inductive and Relay-Aided Sensor Networks

Author: Henry Ruben Lucas Schulten

Publisher: Logos Verlag Berlin GmbH

Published: 2022-12-15

Total Pages: 198

ISBN-13: 3832555862

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Body-centric wireless sensor networks are expected to enable future technologies such as medical in-body micro robots or unobtrusive smart textiles. These technologies may advance personalized healthcare as they allow for tasks such as minimally invasive surgery, in-body diagnosis, and continuous activity recognition. However, the localization of individual sensor nodes within such networks or the determination of the entire network topology still pose challenges that need to be solved. This work provides both theoretic and simulative insights to enable the required sub-millimeter localization accuracy of such sensors using magneto-inductive networks. It identifies inherent localization issues such as the asymmetry of the position estimation in magneto-inductive networks and outlines how such issues may be addressed by using passive relays or cooperation. It further proposes a novel approach to recognize the entire structure of a magneto-inductive network using simple impedance measurements and clusters of passive tags. This approach is evaluated extensively by simulation and experiment to demonstrate the feasibility of low-cost human body posture recognition.

Micro-Relay Technology for Energy-Efficient Integrated Circuits
Micro-Relay Technology for Energy-Efficient Integrated Circuits

Author: Hei Kam

Publisher: Springer

Published: 2014-10-16

Total Pages: 190

ISBN-13: 1493921282

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This volume describes the design of relay-based circuit systems from device fabrication to circuit micro-architectures. This book is ideal for both device engineers as well as circuit system designers, and highlights the importance of co-design across design hierarchies when trying to optimize system performance (in this case, energy-efficiency). The book will also appeal to researchers and engineers focused on semiconductor, integrated circuits, and energy efficient electronics.