Numerical Differential Protection: Principles and Applications
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.
What people are saying - Write a review
9 Line Differential Protection
Other editions - View all
accuracy limit factor applied burden busbar protection calculated channel CIGRE circuit current comparison protection corresponds coupler CT dimension CT saturation current flows current transformers delta connected delta winding diagram differential current differential relay earth current earth fault equation error example external faults fault current fault inception fiber high voltage in-feed in-rush induction interface internal interposing CT line differential protection line ends magnetising current maximum measured values multiplexers nominal current numerical protection numerical relays operating optic optic fiber overcurrent overhead lines phasor pick-up sensitivity pick-up threshold pilot wire pilot wire cores Power System Protection principle protected object protection relays resistance restraint current result sampling saturation detector saturation free setting short short-circuit current shown in Figure shunt side signal SIPROTEC stabilising star-point substation summation CT switching synchronisation terminals tion transient transmission twisted pair varistor vector group zero sequence current