A five-level single-phase grid-connected converter for renewable distributed systems

Giampaolo Buticchi, Emilio Lorenzani, Giovanni Franceschini

Research output: Journal PublicationArticlepeer-review

125 Citations (Scopus)


In low-power renewable systems, a single-phase grid-connected converter is usually adopted. This paper deals with a novel five-level converter topology that follows this trend. A review of the state of the art of the five-level topologies and a theoretical power loss comparison with the proposed solution is realized. The proposed converter architecture is based on a full-bridge topology with two additional power switches and two diodes connected to the midpoint of the dc link. Since the two added levels are obtained by the discharge of the two capacitors of the dc link, the balancing of the midpoint voltage is obtained with a specific pulse width modulation (PWM) strategy. Simulation and experimental results show the effectiveness of the proposed solution.

Original languageEnglish
Article number6177241
Pages (from-to)906-918
Number of pages13
JournalIEEE Transactions on Industrial Electronics
Issue number3
Publication statusPublished - 2013
Externally publishedYes


  • DC-AC power conversion
  • distributed power generation
  • grid-connected converters
  • multilevel converters
  • single-phase systems

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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