Disfani, Vahid R.
Karrar, Abdelrahman A.; Ofoli, Abdul R.
College of Engineering and Computer Science
University of Tennessee at Chattanooga
Place of Publication
Modular multilevel converter (MMC) stands out among converter topologies for medium/high-power applications. With salient features like modularity and scalability, MMC can meet the requirement of theoretically any voltage level with higher efficiency and superior harmonic performance, using converter components with reduced ratings. Unlike conventional converters, MMC has a higher switching frequency due to its higher number of switching components. While MMC has been mainly considered for transmission-level applications such as HVDC, it still needs improvements for medium-voltage systems and grid integration of distributed energy resources. The contribution of this thesis is twofold. First, modulation techniques are designed to reduce switching frequency through novel advanced submodule sorting algorithms, which provide a level of controllability over two conflicting constraints – switching frequency reduction and capacitor voltage deviation – for HVDC applications. Second, a topology design based on full-bridge submodules is proposed to use MMC in grid integration of solar photovoltaic systems.
M. S.; A thesis submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Master of Science.
Power electronics; Electric power systems -- Control; Electric power transmission
xv, 120 leaves
Khanal, Saroj, "Optimal modulation and topology design of modular multilevel converter for grid integration of solar photovoltaic systems" (2019). Masters Theses and Doctoral Dissertations.