A Limited Common-Mode Current Switched-Capacitor Multilevel Inverter Topology and Its Performance and Lifetime Evaluation in Grid-Connected Photovoltaic Applications

Hossein Khoun Jahan, Reyhaneh Eskandari, Tohid Rahimi, Rasoul Shalchi Alishah, Lei Ding, Kent Bertilsson, Mehran Sabahi and Frede Blaabjerg
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Hossein Khoun Jahan: Electrical and Computer Engineering Faculty, University of Tabriz, Tabriz 51666, Iran
Reyhaneh Eskandari: Electrical and Computer Engineering Faculty, University of Tabriz, Tabriz 51666, Iran
Tohid Rahimi: School of Electrical Engineering, Shandong University, Jinan 250031, China
Rasoul Shalchi Alishah: Department of Electronics Design, Mid Sweden University, 85170 Sundsvall, Sweden
Lei Ding: School of Electrical Engineering, Shandong University, Jinan 250031, China
Kent Bertilsson: Department of Electronics Design, Mid Sweden University, 85170 Sundsvall, Sweden
Mehran Sabahi: Electrical and Computer Engineering Faculty, University of Tabriz, Tabriz 51666, Iran
Frede Blaabjerg: Department of Energy Technology, Aalborg University, DK-9220 Aalborg, Denmark

Energies, 2021, vol. 14, issue 7, 1-18

Abstract: In this paper, a switched-capacitor multilevel inverter with voltage boosting and common-mode-voltage reduction capabilities is put forth. The proposed inverter is synthesized with one-half bridge and several switched-capacitor cells. Due to the voltage boosting and common-mode current reduction features, the proposed multilevel inverter is suitable for grid-connected PV applications. In addition, an analytical lifetime evaluation based on mission profile of the proposed inverter has been presented to derive lifetime distribution of semiconductors. Whereas in the proposed inverter, any components failure can bring the whole system to a shutdown. The series reliability model is used to estimate the lifetime of the overall system. The performance of the suggested multilevel inverter in grid-connected applications is verified through the simulation results using the grid-tied model in Matlab/Simulink. Moreover, the viability and feasibility of the presented inverter are proven by using a one kW lab-scaled prototype.

Keywords: grid-tied PV; common-mode current; switched capacitor multilevel (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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