Advanced Modulation, Control and Application for Multilevel Inverters

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dc.contributor.advisorAlex Huang, Committee Chairen_US
dc.contributor.advisorHoon Hong, Committee Memberen_US
dc.contributor.advisorSubhashish Bhattacharya, Committee Memberen_US
dc.contributor.advisorMesut Baran, Committee Memberen_US
dc.contributor.authorLiu, Yuen_US
dc.date.accessioned2010-04-02T18:27:38Z
dc.date.available2010-04-02T18:27:38Z
dc.date.issued2009-11-13en_US
dc.degree.disciplineElectrical Engineeringen_US
dc.degree.leveldissertationen_US
dc.degree.namePhDen_US
dc.descriptionNorth Carolina State University Theses Electrical and Computer Engineering.;North Carolina State University Theses Electrical and Computer Engineering.
dc.description.abstractLIU, YU. Advanced Modulation, Control and Application for Multilevel Inverters. (Under the direction of Alex Huang.) The purpose of the research has been to develop advanced modulation, control and application for multilevel inverters. A new series of modulations has been proposed to achieve minimal THD (Total Harmonic Distortion) for multilevel inverters. The first minimal THD modulation is a real-time algorithm used to calculate optimal values of switching angles for given DC voltages and a modulation index. The second one is an algorithm used to calculate optimal values of DC voltages and switching angles for a given modulation index. The third one used an algorithm to calculate optimal values of DC voltages, switching angles and a modulation index. Another new optimal combination modulation strategy has been proposed for the 10 MVA 5-level cascade multilevel inverter based STATCOM (Static Synchronous Compensator) system. In this thesis, I also proposed several advanced controls for cascade multilevel inverters to be used in STATCOM applications. A new feedback control strategy for balancing individual DC capacitor voltages is proposed. The key part of the control strategy is a compensator used to cancel the variable parts in the model. I have also proposed the solutions for enhancing ride-through capability of the STATCOM during faults conditions.en_US
dc.formatThesis (Ph.D.)--North Carolina State University.
dc.identifier.otheretd-10152009-140740en_US
dc.identifier.urihttp://www.lib.ncsu.edu/resolver/1840.16/3180
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, dis sertation, 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 NC State University 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.subjectTotal Harmonic Distortionen_US
dc.subjectFACTSen_US
dc.subjectSTATCOMen_US
dc.subjectMultilevel Inverteren_US
dc.subjectConverteren_US
dc.subjectPower Qualityen_US
dc.subjectPower Electronicsen_US
dc.titleAdvanced Modulation, Control and Application for Multilevel Invertersen_US
dcterms.abstractKeywords: total harmonic distortion, FACTS, STATCOM, multilevel inverter, converter, power quality, power electronics.
dcterms.extentxv, 206 pages : illustrations (some color)

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