Single-phase boost switched-capacitor-based multilevel inverter topology with reduced switching device

Siddique, Marif Daula and Karim, Mohammad Fazlul and Mekhilef, Saad and Rawa, Muhyaddin and Seyedmahmoudian, Mehdi and Horan, Ben and Stojcevski, Alex and Ahmed, Mahrous (2022) Single-phase boost switched-capacitor-based multilevel inverter topology with reduced switching device. IEEE Journal of Emerging and Selected Topics in Power Electronics, 10 (4). pp. 4336-4346. ISSN 2168-6777, DOI

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A multilevel inverter (MLI) with a step-up feature has become significant for connecting a low-voltage PV system with a utility grid. An MLI has been presented in this article with a lower component count. The described structure has achieved nine distinguish voltage levels using 12 switches and a switched capacitor unit having twice voltage boost. A self-balancing of the floating capacitor voltage without any auxiliary circuits and precharging has been obtained. The new topology includes fewer switches, reduced voltage stress, and an inherent reversing polarity without the back-end H-bridge, which has been the additional feature of the proposed circuitry. The topology proposed has been controlled with the nearest level control pulsewidth control technique (NLC-PWM). A comprehensive comparative analysis with several similar topologies has been presented in this article to show the merits of the recommended topology. A number of simulation results using PLECS software have been discussed along with experimental results that have been obtained from a laboratory prototype. The validation of the proposed topology has been carried out using different steady-steady and transient operating conditions.

Item Type: Article
Funders: Taif University, Taif, Saudi Arabia (Grant No: TURSP2020/146), Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, Saudi Arabia (Grant No: FP-107-43)
Uncontrolled Keywords: Topology; Capacitors; Voltage; Switches; Multilevel inverters; Stress; Voltage control; Boost inverter; Multilevel inverter (MLI); Nearest level control pulsewidth control technique (NLC-PWM); Reduce switch count; Step-up inverter
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 08 Nov 2023 08:15
Last Modified: 08 Nov 2023 08:15

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