Title: A new multi-input two-output switched-source multilevel inverter based on harvest of maximum energy for photovoltaic applications

Authors: Seyed Jafar Salehi; Mohammad Ali Shamsi-Nejad; Hamid Reza Najafi

Addresses: Department of Electrical and Computer Engineering, University of Birjand, Birjand, Iran ' Department of Electrical and Computer Engineering, University of Birjand, Birjand, Iran ' Department of Electrical and Computer Engineering, University of Birjand, Birjand, Iran

Abstract: In multilevel inverters, unused energies are created due to the asynchronous use of the input DC-sources. This means that when the input DC-sources are replaced by renewable systems such as photovoltaic arrays, some of the input energies remain unused by the multilevel inverter. This paper presents a new multi-input two output multilevel inverter topology that can harvest the unused energies and return them to another load which leads to the harvest of the maximum input energy. The harvest of maximum energy (HME)-based multilevel inverter structure consists of two independent terminals both of which can be connected to the AC load. Another merit of the proposed multilevel inverter is that the number of its switches is comparable to other structures where unused energies cannot be harvested. The nearest level control (NLC) has been used as the switching strategy in the proposed multilevel structure. In order to verify the performance of the HME-based multilevel inverter topology, the simulation and experimental results for a type seven-level inverter are provided by MATLAB and TMS320F28379D DSP, respectively.

Keywords: multilevel inverter; MLI; multi-input two-output; harvest of maximum energy; HME; nearest level control; NLC.

DOI: 10.1504/IJPELEC.2024.136561

International Journal of Power Electronics, 2024 Vol.19 No.2, pp.167 - 192

Received: 26 Aug 2022
Accepted: 09 Jan 2023
Published online: 07 Feb 2024 *

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