الفهرس 
THESIS OBJECTIVES AND CONTRIBUTION
POWER SYSTEM AND MUTUAL COUPLING EFFECTOnly 14 pages are availabe for public view
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Abstract
Double circuit transmission lines are used more widespread as they increase the power transmission capacity and increase the reliability of the system. The classification of the fault type for various operation and switching modes on such lines using conventional techniques is difficult. The faulted phase(s) on one circuit has an effect on the phases of the healthy circuit due to mutual coupling between the two circuits.
The change in power systems can affect the performance of distance relays protection. In case of distance protection especially the state of parallel circuit operation depending on the power system state, a distance relay can cover from less than 50% up to far more than100% of the total line length.
An adaptive correction factor in case of SLG (single line to ground fault) and LLG (line to line to ground fault ) for the compensation of the mutual coupling effect is verified. It’s achieved using the simulation results of ATP-EMTP program before and after considering the mutual coupling effect. An artificial neural network technique (ANN) using (neudesk program) is utilized in adjusting the relay decision.
The adaptive protection is applied to a double circuit transmission line model and the results are presented and discussed.