Toggle Main Menu Toggle Search

Open Access padlockePrints

A new boost switched capacitor seven-level grid-tied inverter

Lookup NU author(s): Weichi Zhang, Yahya Naderi ZarnaghiORCiD, Chenming Zhang



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2020 The Authors. IET Power Electronics published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology. In this paper, a new switched capacitor-based multilevel inverter structure is suggested. The proposed topology can generate seven-level output voltage waveform using ten power electronic switches and two floating capacitors. This structure has the ability to boost the input DC voltage, up to 1.5 times. Although this topology can generate an output waveform with large number of levels, it does not increase the voltage stress on the power electronic switches. There is no need for capacitor voltage balancing in this structure since the capacitors are balanced through charging and discharging modes of operation. In addition, the suggested switched capacitor inverter reduces the number of input dc power supplies and uses a single dc source such as a photovoltaic (PV) panel. Since the proposed inverter is an neutral point clamp based multilevel inverter topology, the leakage current is minimized and as a result the overall efficiency of the proposed system is increased. The operation modes and steady-state analysis of the proposed structure are explained in detail. In order to validate the feasibility of the proposed topology, some experimental results are presented in the grid connected mode of operation.

Publication metadata

Author(s): Gao Y, Zhang W, Naderi Zarnaghi Y, Vosoughi Kurdkandi N, Zhang C

Publication type: Article

Publication status: Published

Journal: IET Power Electronics

Year: 2021

Volume: 14

Issue: 2

Pages: 268-279

Print publication date: 01/02/2021

Online publication date: 31/12/2020

Acceptance date: 26/08/2020

Date deposited: 17/07/2021

ISSN (print): 1755-4535

ISSN (electronic): 1755-4543

Publisher: John Wiley and Sons Ltd


DOI: 10.1049/pel2.12031


Altmetrics provided by Altmetric