A Novel Five-Level Transformer-less Inverter Topology with Common-Ground for Grid-Tied PV Applications

Jaber Fallah Ardashir*, Mahdi Gasemi, Saeed Peyghami, Behrouz Rozmeh, Frede Blaabjerg

*Corresponding author for this work

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

3 Citations (Scopus)

Abstract

This paper proposes a new common ground transformer-less step-up 5-Level inverter using a single dc voltage source without leakage current for grid-connected PV applications. The proposed inverter is based on the flying capacitor concept which uses seven switches, three dc capacitors and a single dc source to generate a 5-level discrete output voltage. The main merits of the proposed single-stage topology include common-ground type, reactive power support, boosting capability and a fewer number of components compared with recently introduced five-level topologies. The proposed inverter has double voltage boosting gain without utilizing any step-up dc/dc converter which makes it a promising structure for grid-tied PV applications. The superiority of the proposed inverter is compared with similar existing five-level topologies in order to highlight its advantages. Moreover, a 1-kVA experimental prototype is implemented to show the proficiency of proposed inverter.
Original languageEnglish
Title of host publication2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)
Publication date2021
Pages1-10
ISBN (Print)978-1-6654-3384-6
ISBN (Electronic)978-9-0758-1537-5
Publication statusPublished - 2021
Event2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe) - Ghent, Belgium
Duration: 6 Sept 202110 Sept 2021

Conference

Conference2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)
LocationGhent, Belgium
Period06/09/202110/09/2021

Keywords

  • Transformer-less Inverter
  • Five-Level Inverter
  • Common-Ground
  • Grid-Tied PV
  • DC-AC converter
  • Leakage current
  • Grid-connected inverter
  • Flying Capacitor Boost Converter
  • Transformer-less PV inverter

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