الفهرس 
Expansion of electrical power networksOnly 14 pages are availabe for public view
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Abstract
Wide area protection uses wide area information from different location in the network to determine the faulted element. This thesis focuses on developing a new scheme for wide area protection of electrical networks The proposed scheme depends on using average power with eliminating the need for phasor measurement units. This will be reflected positively on the processing time and cost. According to the proposed scheme, average power at two ends of transmission line is measured using recursive discrete Fourier transform form. For the faulted line, the average power at one end of transmission line is in one direction, while that at the other end is in the opposite of that direction, and then the internal fault is detected. For the external fault, the average power at the two ends of transmission line is in the same direction similar to the direction of the power in the normal or healthy conditions. To discriminate between the external fault condition and the healthy condition, the difference power over the transmission lines is used .The proposed scheme is applied on IEEE 14 bus system. All simulations are carried out using MATLAB/SIMULINK software package. Following fault detection, a fault location algorithm is proposed based on the measured power loss at both terminals of the faulted line. The fault location algorithm considered both solid and resistive faults. Finally, a fault classification algorithm is proposed based on the ratios of phase powers to each other. A code matrix is used to each ratio considering that the normal ratio ranges between 0.8 and 1.2. Several case studies are presented to validate the fault location and classification algorithms.