Advanced Modulation, Control and Application for Multilevel Inverters

Total Harmonic Distortion;FACTS;STATCOM;Multilevel Inverter;Converter;Power Quality;Power Electronics

Liu, Yu ; Alex Huang, Committee Chair,Hoon Hong, Committee Member,Subhashish Bhattacharya, Committee Member,Mesut Baran, Committee Member,Liu, Yu ; Alex Huang ; Committee Chair ; Hoon Hong ; Committee Member ; Subhashish Bhattacharya ; Committee Member ; Mesut Baran ; Committee Member

University:North Carolina State University

关键词: Total Harmonic Distortion;    FACTS;    STATCOM;    Multilevel Inverter;    Converter;    Power Quality;    Power Electronics;   

Others  :  https://repository.lib.ncsu.edu/bitstream/handle/1840.16/3180/etd.pdf?sequence=1&isAllowed=y

美国|英语

来源: null

【 摘 要 】

LIU, 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.