الفهرس 
DIFFERENTIAL PROTECTION AND POWER TRANSFORMEROnly 14 pages are availabe for public view
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Abstract
The protection science plays a great role In protecting
power system plants and electrical equipment. The need is
necessary, with the advance in today’s world and its high
dependability on electricity, to design reliable protective
systems which trip the faulty part of power systems and evade
tripping the healthy one.
This thesis deals with one of the most important
protective systems, differential protection, and goes into the
main problems, and their reasons, that face the differential
protective systems. It reviews the most significant academic or
applied solutions. The research presents analysis of the
saturation current of the CT’s connected on differential
protective systems to extract fundamental’s phase angle of the
saturated current. The analysis of the saturation current has been
done numerically using computer facilities. Based on this
analysis, the research presents, using the phase comparison
technique, a developed technique to overcome the CT saturation
problem which can be used in various differential protective
applications.
The new developed technique is applied to bus bar
protective systems and the results have concluded that the new
approach eliminates the mal-operation of the relay.
Finally, the research outlines the results and recommendations
for future work