A comparative review on single phase transformerless inverter topologies for grid-connected photovoltaic systems

Kibria, Md. Faruk and Elsanabary, Ahmed and Tey, Kok Soon and Mubin, Marizan and Mekhilef, Saad (2023) A comparative review on single phase transformerless inverter topologies for grid-connected photovoltaic systems. Energies, 16 (3). ISSN 1996-1073, DOI https://doi.org/10.3390/en16031363.

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The uses of grid-connected photovoltaic (PV) inverters are increasing day by day due to the scarcity of fossil fuels such as coal and gas. On the other hand, due to their superior efficiency, lower cost, smaller size, and lighter weight when compared to inverters with transformers, transformerless inverters for low-voltage single-phase grid-tied photovoltaic (PV) systems have recently attracted more interest. However, there are some specific challenges, especially leakage current issues, which must be adequately addressed to ensure the safety standards of the grid codes. A variety of topologies has been presented in the literature to eliminate the leakage current using the decoupling or clamping technique. However, choosing an appropriate topology after comparison is challenging because each topology has a unique set of parameters. In this paper, the authors have selected a common set of parameters and simulated all the selected eighteen well-known topologies in MATLAB/Simulink to fairly analyze and compare their common mode characteristics and other output parameters. In addition, the power loss distribution of every switch of each of the eighteen topologies was calculated and presented to better understand the insight of the topologies.

Item Type: Article
Funders: Ministry of Education, Malaysia (LRGS/1/2019/UKM/01/6/3), Universiti Tenaga Nasional (IC6-BOLDREFRESH2025), Universiti Tenaga Nasional (BOLD2025)
Uncontrolled Keywords: AC decoupling; DC decoupling; Grid-connected inverter; Leakage current; Mid-point clamping; Solidly clamping; Total common mode voltage; Transformerless inverter
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Computer Science & Information Technology
Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms Zaharah Ramly
Date Deposited: 26 Jun 2023 04:44
Last Modified: 26 Jun 2023 04:44
URI: http://eprints.um.edu.my/id/eprint/38708

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