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dc.contributor.authorQuint, Ryan Daviden_US
dc.date.accessioned2014-03-14T20:47:46Z
dc.date.available2014-03-14T20:47:46Z
dc.date.issued2011-11-11en_US
dc.identifier.otheretd-11112011-131328en_US
dc.identifier.urihttp://hdl.handle.net/10919/35667
dc.description.abstractTodayâ s electric power system is operated under increasingly stressed conditions. As electrical demand increases, the existing grid is operated closer to its stable operating limits while maintaining high reliability of electric power delivery to its customers. Protective schemes are designed to account for pressures towards unstable operation, but there is always a tradeoff between security and dependability of this protection. Adaptive relaying schemes that can change or modify their operation based on prevailing system conditions are an example of a protective scheme increasing reliability of the power system. The purpose of this thesis is to validate and analyze implementation of the Security-Dependability Adaptive Voting Scheme. It is demonstrated that this scheme can be implemented with a select few Phasor Measurement Units (PMUs) reporting positive sequence currents to a Phasor Data Concentrator (PDC). At the PDC, the state of the power system is defined as Stressed or Safe and a set of relays either vote or perform normal operation, respectively. The Adaptive Voting Scheme was implemented using two configurations: hardware- and software-based PDC solutions. Each was shown to be functional, effective, and practical for implementation. Practicality was based on the latency of Wide Area Measurement (WAM) devices and the added latency of relay voting operation during Stressed conditions. Phasor Measurement Units (PMUs), Phasor Data Concentrators (PDCs), and relay operation delays were quantified to determine the benefits and limitations of WAMS protection and implementation of the voting scheme. It is proposed that the delays injected into the existing protection schemes would have minimal effect on the voting scheme but must be accounted for when implementing power system controls due to the real-time requirements of the data.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartQuint_RD_T_2011.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectadaptive protectionen_US
dc.subjectdecision treesen_US
dc.subjectphasor measurement uniten_US
dc.subjectphasor data concentratoren_US
dc.subjectwide area measurementsen_US
dc.titlePractical Implementation of a Security-Dependability Adaptive Voting Scheme Using Decision Treesen_US
dc.typeThesisen_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
dc.contributor.committeechairCenteno, Virgilio A.en_US
dc.contributor.committeememberDe La Ree Lopez, Jaimeen_US
dc.contributor.committeememberBroadwater, Robert P.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11112011-131328/en_US
dc.date.sdate2011-11-11en_US
dc.date.rdate2011-12-06
dc.date.adate2011-12-06en_US


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