Portland State University. Department of Electrical and Computer Engineering
Term of Graduation
Date of Publication
Master of Science (M.S.) in Electrical and Computer Engineering
Electrical and Computer Engineering
1 online resource (xi, 63 pages)
A Modular Multilevel Converter (MMC) is an attractive candidate in high power conversion due to its modularity and scalability. The energy storage element, namely the module capacitance in the MMC submodule circuit, is typically large and when scaled to convert high power, requires very bulky module capacitors. In addition to deteriorating the power density, the design necessitates the use of electrolytic capacitors, which further affects the overall converter efficiency and reliability. This research presents an MMC submodule topology and the accompanying modulation approach that reduces the submodule capacitance requirements significantly compared to conventional MMC topology (few micro-farads versus several milli-farads). This can permit the use of only film capacitors thus improving overall converter reliability. This thesis explores the analytical models of the approach along with a comparative study. The work is verified using circuit simulations and a laboratory-scale experimental prototype.
©2022 Wiwin Hartini Lew
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Lew, Wiwin Hartini, "Highly Power Dense DC to Three-Phase AC Modular Converters with Tiny Module Capacitors" (2022). Dissertations and Theses. Paper 6254.
Available for download on Wednesday, December 20, 2023