A generalized multilevel inverter based on T-Type switched capacitor module with reduced devices

Wang, Yaoqiang, Yuan, Yisen, Li, Gen ORCID: https://orcid.org/0000-0002-0649-9493, Chen, Tianjin, Wang, Kewen and Liang, Jun ORCID: https://orcid.org/0000-0001-7511-449X 2020. A generalized multilevel inverter based on T-Type switched capacitor module with reduced devices. Energies 13 (17) , 4406. 10.3390/en13174406

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Abstract

Conventional multilevel inverters have problems in terms of their complicated expansion and large number of devices. This paper proposes a modular expanded multilevel inverter, which can effectively simplify the expansion and reduce the number of devices. The proposed inverter can ensure the voltage balancing of the voltage-dividing capacitors. The cascading of the T-type switched capacitor module and the step-by-step charging method of the switched capacitors enable the inverter to achieve high output voltage levels and voltage gain. In addition, the inversion can be achieved without the H-bridge, which greatly reduces the total standing voltage of the switches. The nine-level inverter of the proposed topology can be realized with only ten switches, obtaining a voltage gain that is two times larger. The above merits were validated through theoretical analysis and experiments. The proposed inverter has good application prospects in medium- and low-voltage photovoltaic power generation.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	MDPI
ISSN:	1996-1073
Date of First Compliant Deposit:	26 August 2020
Date of Acceptance:	21 August 2020
Last Modified:	05 May 2023 07:46
URI:	https://orca.cardiff.ac.uk/id/eprint/134517

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