Numerical Differential Protection: Principles and Applications

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John Wiley & Sons, Jan 27, 2012 - Technology & Engineering - 300 pages
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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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Contents

1 Introduction
10
2 Definitions
12
3 Mode of Operation
17
4 Measuring Technique
52
5 Current Transformers CTs
70
6 Communications
117
7 GeneratorMotor Differential Protection
149
8 Transformer Differential Protection
167
10 Busbar Differential Protection
237
11 Relay Design
265
12 Commissioning and Maintenance
272
Literature
275
Addendum
283
Index
284
Future Books from Publicis Publishing
288
Copyright

9 Line Differential Protection
202

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About the author (2012)

GERHARD ZIEGLER
(former Siemens AG) is past chairman of the Study Committee 34 (protection and local control) and Honorary Member of CIGRE. He is now working as a consultant.

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