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dc.contributor.advisor Seddik, Karim El Hosainy, Mahmoud Mostafa 2017-09-13T08:31:00Z Fall 2017 en_US 2017-09-13
dc.description.abstract Due to perpetual and innovative technological advancements, the need for reliable and stable power generation and transmission has been increasing dramatically over the years. Smart grids use advanced technologies to provide self-monitoring, self-checking and self-healing power networks, including smart metering devices capable of providing accurate measurements of the network’s power components. Among the most important metering devices in this context are “Phasor Measurement Units (PMUs)”. PMUs are metering devices that provide synchronized measurements of voltage, current and phase angle differences using signals from the GPS satellites. However, due to the high cost of such advanced metering devices, studies were performed to determine the minimum number of PMUs required and their strategic placements in the power networks to provide full system observability. In this thesis, we consider fault-tolerant PMU placement aiming to minimize the number of PMUs while maintaining system observability under various contingencies. Conventionally, the optimal number of PMUs in a system is determined based on the system’s connectivity matrix under no contingency. This thesis considers fault- tolerant PMU placement under single and double branch failures. We propose algebraic connectivity, or Fiedler value, to identify the worst- case branch failures in terms of connectivity degradation. The proposed PMU placement accounts for this worst-case and covers a large percentage of other single and double branch failures. Furthermore, we propose the usage of Fiedler vector to provide a PMU placement that would ensure that the system remains fully observable during system partitioning into separate sub-systems. The resulting placements are compared with those obtained without considering connectivity degradation or system partitioning in terms of the percentages of observable systems during any single and double branch failures. The proposed PMU placements have increased percentages of fully observable systems in the event of any single or double branch failures compared to non—contingency based placement, with a reasonable increase in number of PMUs, and for some placement approaches no increase in PMUs is needed for providing a higher percentage of fully observable systems. en_US
dc.format.extent 77 p. en_US
dc.format.medium theses en_US
dc.language.iso en en_US
dc.rights Author retains all rights with regard to copyright. en
dc.subject Phasor Measurment Unit en_US
dc.subject Fault-tolerant en_US
dc.subject Branch Failure en_US
dc.subject Fiedler en_US
dc.subject Algebraic Connectivity of Graphs en_US
dc.subject.lcsh Thesis (M.S.)--American University in Cairo en_US
dc.title Improved fault-tolerant PMU placement using algebraic connectivity of graphs en_US
dc.type Text en_US
dc.subject.discipline Electronics Engineering en_US
dc.rights.access This item is available en_US
dc.contributor.department American University in Cairo. Dept. of Electronics Engineering en_US
dc.description.irb American University in Cairo Institutional Review Board approval is not necessary for this item, since the research is not concerned with living human beings or bodily tissue samples. en_US
dc.contributor.committeeMember Elezabi, Ayman
dc.contributor.committeeMember Gadallah, Yasser
dc.contributor.committeeMember Saad, Mohamed Shawky

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  • Theses and Dissertations [1521]
    This collection includes theses and dissertations authored by American University in Cairo graduate students.

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