Ahmed Galal Ahmed ِAbdrabo <br/><br/>
Comprehensive fault location scheme for power transmission lines /  
 اقتراح نظام متكامل لتحديد أماكن الأعطال على الخطوط الهوائية 
Ahmed Galal Ahmed ; Supervised Essam Eldin AboElzahab , Doaa Khalil Ibrahim 
 - Cairo :   Ahmed Galal Ahmed Abdrabo ,   2014 
 - 173 P. ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Electrical Power and Machines 
<br/><br/> Accurate fault location on transmission lines is an important subject for researchers and network users to be assuring of continuity of supplying electric power, reducing outage time and reducing customer complaints. There are some factors affecting the process of fault location which are neglecting impact of fault resistance, supposing the parameters of the transmission line are fixed, false  detecting and classifying of faults and neglecting the synchronization angle between both ends. For improving these negative effects, this thesis introduces a scheme for calculating transmission line parameters and extended to detect and classify both low and high impedance faults. This scheme also calculates low impedance fault location using unsynchronized measurements for voltage and current from both ends and also measures the accuracy of calculating low impedance fault location  when the communication link between both ends fails by using the measurements  of voltage and current at single end. This scheme is extended to calculate high  impedance fault location using the measurements of voltage and current from both ends 
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<br/><br/><label>Subjects--Index Terms: </label>Fault location High impedance fault Low impedance fault