Optimal modulation and topology design of modular multilevel converter for grid integration of solar photovoltaic systems

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.

Grantor dc:publisher

University of Tennessee at Chattanooga

Year dc:date.available

2021

Author dc:creator

• Khanal, Saroj

Contributors dc:contributor

• Disfani, Vahid R.
• Karrar, Abdelrahman A.; Ofoli, Abdul R.
• College of Engineering and Computer Science

• Power electronics
• Electric power systems -- Control
• Electric power transmission

Licence

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language

English, eng

Repository record dc:identifier

https://scholar.utc.edu/theses/613

OAI identifier oai:identifier

oai:scholar.utc.edu:theses-1779