Modular multilevel converters for solar photovoltaic - battery energy storage system integration

PV systems have intermittency and partial shading challenges which endanger the stability and reliability of electric grids. Due to their scalable and modular structure, modular multilevel converters (MMC) are suitable for grid integration of PV and battery energy storage system (BESS). This thesis proposes a novel half-bridge submodule MMC (HBMMC) solution to connect distributed PV systems using distributed maximum power point tracking across the MMC submodules (SM) hence, addressing the partial shading challenge. To address PV power fluctuation due to intermittency, a novel solution to interconnect PV-BESS to the power grid through full-bridge submodule MMC (FBMMC) is proposed. In this solution, PV modules are distributed across the FBMMC SMs and a fully controllable large BESS is connected to the FBMMC DC-link to support the grid ancillary services. Full control over BESS is achieved by the full control over the MMC DC-link voltage as a result of the proposed MMC solution.

Grantor dc:publisher

University of Tennessee at Chattanooga

Year dc:date.available

2021

Author dc:creator

• Mohamed, Farog

Contributors dc:contributor

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

• Electric current converters
• Photovoltaic power systems
• Predictive control

Licence

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

Language dc:language

English, eng

Repository record dc:identifier

https://scholar.utc.edu/theses/674

OAI identifier oai:identifier

oai:scholar.utc.edu:theses-1839