Committee Chair

Disfani, Vahid R.

Committee Member

Eltom, Ahmed H.; Karrar, Abdelrahman A.; Ofoli, Abdul R.

Department

Dept. of Electrical Engineering

College

College of Engineering and Computer Science

Publisher

University of Tennessee at Chattanooga

Place of Publication

Chattanooga (Tenn.)

Abstract

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.

Degree

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.

Date

8-2020

Subject

Electric current converters; Photovoltaic power systems; Predictive control

Keyword

Battery energy storage system; Maximum power point tracking; Model predictive control (MPC); Modular multilevel converter (MMC); Photovoltaic system; Power electronic converters

Document Type

Masters theses

DCMI Type

Text

Extent

xii, 102 leaves

Language

English

Rights

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

License

http://creativecommons.org/licenses/by-nc-nd/4.0/

Date Available

9-1-2021

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