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" Numerical differential protection : "
by Gerhard Ziegler.
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BL
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| Record Number
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778549
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b598561
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| Main Entry
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by Gerhard Ziegler.
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| Title & Author
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Numerical differential protection : : principles and applications\ by Gerhard Ziegler.
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| Edition Statement
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2. ed
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| Publication Statement
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Erlangen : Publicis Pub., 2012
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| Page. NO
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(287 pages) : illustrations
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| ISBN
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3895786705
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: 9783895786709
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| Contents
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Cover --; Numerical Differential Protection --; Foreword to the First Edition --; Foreword to the Second Edition --; Contents --; 1 Introduction --; 1.1 Protection principle --; 1.2 Numerical differential protection --; 2 Definitions --; 3 Mode of Operation --; 3.1 Introduction --; 3.2 Basic principles --; 3.2.1 Current differential protection --; 3.2.2 Biased (stabilized) differential protection --; 3.2.3 Differential Protection with two pilot wire cores --; 3.2.4 Operating characteristics --; 3.3 Measuring circuit for three phase systems --; 3.3.1 Measurement per phase --; 3.3.2 Composite current version --; 3.4 High Impedance (HI) Differential Protection --; 3.5 Partial Differential Protection --; 4 Measuring Technique --; 4.1 Classical analog systems --; 4.2 Numerical measuring technique --; 4.2.1 Acquisition of measured values --; 4.2.2 Differential protection with instantaneous value comparison --; 4.2.3 Differential protection with phasors --; 4.2.4 Additional stabilisation with CT saturation --; 5 Current Transformers (CTs) --; 5.1 Current Transformer equivalent circuits --; 5.2 Specifications for the steady state response of current transformers --; 5.3 Transient response of the CT --; 5.4 TP Current transformer classes --; 5.5 Polarity of the CT --; 5.6 CT errors --; 5.7 Dimensioning of the CT --; 5.8 Interposing CTs --; 6 Communications --; 6.1 Transmission channels --; 6.1.1 Pilot wires --; 6.1.2 Fiber Optic Cables --; 6.1.3 Line of sight radio links --; 6.2 Digital protection communication --; 6.3 Digital communication networks --; 7 Generator/Motor Differential Protection --; 7.1 Generator differential protection --; 7.2 Motor Differential Protection --; 8 Transformer Differential Protection --; 8.1 Basic physics --; 8.2 Numerical measured value processing --; 8.3 High impedance differential protection --; 8.4 Relays for transformer differential protection. 8.5 Application examples for transformer protection --; 9 Line Differential Protection --; 9.1 Three core pilot wire (triplet) differential protection --; 9.2 Two core (twisted pair) pilot wire differential protection --; 9.3 Line differential protection with digital communication --; 9.3.1 Devices and system configuration --; 9.3.2 Measuring technique --; 9.3.3 Communication variants --; 9.3.4 Additional functions and application notes --; 9.4 Phase comparison protection with digital communication --; 9.5 Differential protection of feeders including transformers --; 9.5.1 Protection of transformer feeders --; 9.5.2 Differential protection for feeders with tee-offs (tapped lines) --; 10 Busbar Differential Protection --; 10.1 Low impedance busbar differential protection --; 10.1.1 Partially numerical busbar differential protection 7SS600 --; 10.1.2 Fully-numerical busbar protection 7SS52 --; 10.2 Response of the numerical busbar protection in the case of CT saturation and the demands placed on CT dimension --; 10.3 High-impedance busbar protection --; 11 Relay Design --; 12 Commissioning and Maintenance --; 12.1 Commissioning --; 12.2 Maintenance --; Literature --; Essays --; Protection technology reference books --; Books out of print: --; Addendum --; Index --; Future Books from Publicis Publishing.
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| Abstract
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Differential protection is a fast and selective method of protection against short-circuits. It is applied in many variants for electrical machines, trans-formers, busbars, and electric lines. Initially this book covers the theory and fundamentals of analog and numerical differential protection. Current transformers are treated in detail including transient behaviour, impact on protection performance, and practical dimensioning. An extended chapter is dedicated to signal transmission for line protection, in particular, modern digital communication and GPS timing. The emphasis is then placed on the different variants of differential protection and their practical application illustrated by concrete examples. This is completed by recommendations for commissioning, testing and maintenance. Finally the design and management of modern differential protection is explained by means of the latest Siemens SIPROTEC relay series. As a textbook and standard work in one, this book covers all topics, which have to be paid attention to for planning, designing, configuring and applying differential protection systems. The book is aimed at students and engineers who wish to familiarise themselves with the subject of differential protection, as well as the experienced user entering the area of numerical differential protection. Furthermore, it serves as a reference guide for solving application problems. For the new edition all contents have been revised, extended and updated to the latest state-of-the-art of protective relaying.
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| Subject
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Electric measurements -- Mathematics.
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| Subject
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Protective relays.
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| Subject
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Telecommunication lines -- Protection.
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| LC Classification
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TK5103.15B944 2012
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| Added Entry
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Gerhard Ziegler
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