الفهرس 
Title : A proposed busbar protection scheme immune to the impact of outflow current during internal faults
SummaryOnly 14 pages are availabe for public view
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Abstract
This thesis describes a proposed busbar protection scheme immune to the impact of the outflow current during internal faults based on the combination of magnitude and phase angle comparisons into a single characteristic with setting adjustment according to the requirements of the busbar protection. The effective relay performance is achieved by implementing the phaselet approach and the adaptive digital mimic filter to facility estimating the current phasor rapidly that causes the proposed relay to operate faster. The performance of the proposed scheme is extensively analyzed for different fault conditions on a breaker and a half bus substation to ensure its proper response during internal, external and evolving faults. Tests are carried out to investigate the impact of the circulating current, CT saturation, fault inception angle, fault type, fault location and high fault resistance. ATP simulations ensure that the proposed scheme can fulfill all busbar protection requirements within quarter cycle operation time and is not affected by the outflow current during internal faults