Elsanabary, Ahmed and Mekhilef, Saad and Seyedmahmoudian, Mehdi and Stojcevski, Alex (2021) An energy balancing strategy for modular multilevel converter based grid-connected photovoltaic systems. IET Power Electronics, 14 (12, SI). pp. 2115-2126. ISSN 1755-4543, DOI https://doi.org/10.1049/pel2.12113.
Full text not available from this repository.Abstract
Modular multilevel converters (MMC)s are promising candidates for large-scale grid-connected photovoltaic (PV) systems. Due to their modular structure, MMCs provide a direct connection of the PV arrays to the converter submodules. They also offer scalability, independent maximum power point tracking, and enhanced power quality with internal power flow capabilities. However, the intermittent nature of PV arrays introduces a power unbalance inside the converter, which affects its operation. This paper addresses the issue and proposes an energy balancing strategy for the grid-connected MMC-based PV system. It uses the internally generated leg currents to control the power flow inside the converter and inject a three-phase balanced current to the grid with low total harmonic distortion. Compared to the existing strategies, the proposed strategy can overcome any condition of the power unbalance with minimal submodule voltage fluctuations. A 162-kW, 9-kV PV grid-connected system is modelled and simulated in MATLAB Simulink environment. The corresponding results are presented to demonstrate the effectiveness of the proposed control strategy for grid-connected PV systems.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Education, Malaysia[LRGS/1/2019/UKM/01/6/3], Universiti Malaya[ST009-2020] |
| Uncontrolled Keywords: | Engineering; Electrical ; Electronic ; Photovoltaic systems |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Faculty of Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 15 Apr 2022 02:08 |
| Last Modified: | 15 Apr 2022 02:08 |
| URI: | http://eprints.um.edu.my/id/eprint/26777 |
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