Single-Phase Dual-Mode Interleaved Multilevel Inverter for PV Applications

A novel single-phase transformerless dual-mode interleaved multilevel inverter (DMIMI) is proposed in this paper, which can inject a highly sinusoidal ac current to the grid even with the input dc voltage less than the peak grid voltage. Furthermore, dead-beat controllers are developed to directly c...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 67; no. 4; pp. 2905 - 2915
Main Authors Pourfaraj, Alireza, Monfared, Mohammad, Heydari-doostabad, Hamed
Format Journal Article
LanguageEnglish
Published New York IEEE 01.04.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Alternating current
Capacitors
Choppers (circuits)
Dual-mode time sharing
Electric potential
Inductors
interleaved
Inverters
Leakage current
Leakage currents
Modulation
Multilevel
multilevel inverter
Phase transitions
Reactive power
Semiconductor diodes
transformerless
Voltage
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Summary:A novel single-phase transformerless dual-mode interleaved multilevel inverter (DMIMI) is proposed in this paper, which can inject a highly sinusoidal ac current to the grid even with the input dc voltage less than the peak grid voltage. Furthermore, dead-beat controllers are developed to directly calculate the optimal duty cycles in a digital control platform. As compared to the traditional dual-mode multilevel approaches, the DMIMI offers high efficiency, less number of components conducting simultaneously in each operation mode, and the capability of reactive power exchange. This paper presents the theoretical analysis and the experimental results obtained from a 1-kW prototype. The experimental results reveal that the proposed DMIMI can achieve high conversion efficiency and low leakage current as well as high quality grid current.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2019.2910041