A New Modular Multilevel Inverter Based on Step-Up Switched-Capacitor Modules

Aryorad Khodaparast, Erfan Azimi, Ali Azimi, M. Ebrahim Adabi, Jafar Adabi and Edris Pouresmaeil
Additional contact information
Aryorad Khodaparast: Faculty of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Mazandaran, P.O. Box 474, Babol 47148-71167, Iran
Erfan Azimi: Faculty of Electrical and Computer Engineering, Semnan University, Semnan 35131-19111, Iran
Ali Azimi: Faculty of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Mazandaran, P.O. Box 474, Babol 47148-71167, Iran
M. Ebrahim Adabi: Intelligent Electrical Power Grids at Department of Electrical Sustainable Energy, Delft University of Technology, 5031, 2600 GA Delft, The Netherlands
Jafar Adabi: Faculty of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Mazandaran, P.O. Box 474, Babol 47148-71167, Iran
Edris Pouresmaeil: Department of Electrical Engineering and Automation, Aalto University, Maarintie 8, 02150 Espoo, Finland

Energies, 2019, vol. 12, issue 3, 1-16

Abstract: A new structure of switched capacitor multilevel inverter (SCMLI) capable of voltage boosting and with self-balancing ability is introduced in this article. This advantage is the result of a step by step rise of capacitor voltages in each module, supplied by just one DC voltage source. The proposed topology generates a sinusoidal output waveform with a magnitude several times greater than the input one. Higher output staircase AC voltage is obtained by applying a nearest level control (NLC) modulation technique. The most significant features of this configuration can be mentioned as: fewer semiconductor devices, remarkably low total harmonic distortion (THD), desirable operating under high/low frequency, high efficiency, inherent bipolar voltage production, easy circuit expansion, ease of control and size reduction of the circuit thanks to utilizing neither bulky transformer nor inductor. Moreover, the proposed SCMLI is comprehensively surveyed through theoretical investigation and a comparison of its effectiveness to recent topologies. Eventually, the operating principle of a 25-level prototype of the suggested SCMLI is validated by simulation in the MATLAB SIMULINK environment and experimental results.

Keywords: multilevel inverter; single-source converter; switched-capacitor; step-up converter; self-balancing (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: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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