open access publication

Article, 2022

A New Hybrid Cascaded Switched-Capacitor Reduced Switch Multilevel Inverter for Renewable Sources and Domestic Loads

In: IEEE Access, ISSN 2169-3536, Volume 10, Pages 14157-14183, 10.1109/access.2022.3146256

Contributors (6)

Rezaei, Mohammad Amin (Corresponding author) [1] Nayeripour, Majid (0000-0001-5830-3635) [1] Hu, Jiefeng (0000-0001-6725-4564) [2] Band, Shahab S (0000-0001-6109-1311) [3] Mosavi, Amir Hossein (0000-0003-4842-0613) [4] [5] [6] [7] Khooban, Mohammad Hassan [8]

Affiliations

  1. [1] Hamburg University of Applied Sciences
  2. [NORA names: Germany; Europe, EU; OECD]
  3. [2] Federation University
  4. [NORA names: Australia; Oceania; OECD]
  5. [3] National Yunlin University of Science and Technology
  6. [NORA names: Taiwan; Asia, East]
  7. [4] Institute of Information Society, University of Public Service, 1083, Budapest, Hungary
  8. [5] Slovak University of Technology in Bratislava
  9. [NORA names: Slovakia; Europe, EU; OECD]
  10. [6] TU Dresden
  11. [NORA names: Germany; Europe, EU; OECD]
  12. [7] Óbuda University
  13. [NORA names: Hungary; Europe, EU; OECD]
  14. [8] Aarhus University
  15. [NORA names: AU Aarhus University; University; Denmark; Europe, EU; Nordic; OECD]

Abstract

This multilevel inverter type summarizes an output voltage of medium voltage based on a series connection of power cells employing standard configurations of low-voltage components. The main problems of cascaded switched-capacitor multilevel inverters (CSCMLIs) are the harmful reverse flowing current of inductive loads, the large number of switches, and the surge current of the capacitors. As the number of switches increases, the reliability of the inverter decreases. To address these issues, a new CSCMLI is proposed using two modules containing asymmetric DC sources to generate 13 levels. The main novelty of the proposed configuration is the reduction of the number of switches while increasing the maximum output voltage. Despite the many similarities, the presented topology differs from similar topologies. Compared to similar structures, the direction of some switches is reversed, leading to a change in the direction of current flow. By incorporating the lowest number of semiconductors, it was demonstrated that the proposed inverter has the lowest cost function among similar inverters. The role of switched-capacitor inrush current in the selection of switch, diode, and DC source for inverter operation in medium and high voltage applications is presented. The inverter performance to supply the inductive loads is clarified. Comparison of the simulation and experimental results validates the effectiveness of the proposed inverter topology, showing promising potentials in photovoltaic, buildings, and domestic applications. A video demonstrating the experimental test, and all manufacturing data are attached.

Funders

  • Alexander von Humboldt Foundation