First Advisor

Mahima Gupta

Term of Graduation

Fall 2022

Date of Publication

12-20-2022

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Electrical and Computer Engineering

Department

Electrical and Computer Engineering

Language

English

Subjects

Energy conversion, Capacitors, Electric capacity, Electric network topology

DOI

10.15760/etd.8113

Physical Description

1 online resource (xi, 63 pages)

Abstract

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.

Rights

©2022 Wiwin Hartini Lew

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

Persistent Identifier

https://archives.pdx.edu/ds/psu/39175

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