الفهرس 
A LITERATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
Typically, arcing fault conditions have negative impacts on the
reliability of regular distance relays. This thesis conducts the
development of a distance relaying scheme which is capable of
protecting efficiently transmission lines that are subject to
arcing faults. The study system is simulated using
MATLAB/Simulink program with particular concern to arcing
fault modeling. The developed scheme depends on collecting
voltage and current signals from one-end of the line at a rate of
128 samples per cycle. The fault distance estimation problem is
formulated, through discretization, as a set of simultaneous
difference equations. Data windows of different sizes and
locations, with respect to fault occurrence, are used to find the
~ most suitable. The different sampling mechanisms used in this
research aid enriching the modes of solution of the problem.
Two techniques are used for the solution of the problem; least
square error method and simulated annealing method. These
techniques are applied to two study systems. The first system is
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a 400kV transmission line from the literature. The second
system is a part of the 220kV Egyptian network. The simulation
study is applied at different fault locations of the studied
systems. The obtained results prove the superiority of the
simulated annealing - base distance relaying scheme as
compared to the least square error relay. The preferred distance
relay scheme, which yields the best performance, is based on
the data collected during the first half cycle of the fault
occurrence. This leads to a high speed distance relay response
having 10 ms delay. The obtained results prove the effective impact of fault induced transients in estimating accurately the
fault distance.