Current ripple damping control to minimize impedance network for single-phase Quasi-Z source inverter system

Baoming Ge, Yushan Liu, Haitham Abu-Rub, Robert Balog, Fang Zheng Peng, Stephen McConnell, Xiao Li

Research output: Contribution to journalArticle

57 Citations (Scopus)


The single-phase quasi-Z source inverter (qZSI) topology has recently attracted attention for single-phase grid-tie photovoltaic (PV) applications. However, due to the inherent second-harmonic power flow in single-phase systems, a large qZS network is required to reduce the second-harmonic component of currents and voltages on the dc side. Minimization of the qZS network remains an open issue. This paper proposes a technique that minimizes the qZS capacitance and inductance of the single-phase qZSI topology by employing dc-side low-frequency current ripple damping control. Through analysis of power flow, a second-harmonic power model is derived and the ripple power is analyzed for minimization of the qZS network. A current ripple damping control is proposed to ensure suppression of second-harmonic power flow through the inductors. Simulation and experimental results verify the theoretical analysis, damping control, and the proposed design minimization of the qZS network for the single-phase topology.

Original languageEnglish
Article number7437456
Pages (from-to)1043-1054
Number of pages12
JournalIEEE Transactions on Industrial Informatics
Issue number3
Publication statusPublished - 1 Jun 2016



  • Damping control
  • double line-frequency ripple
  • power flow
  • quasi-Z source inverter
  • single-phase system

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Electrical and Electronic Engineering

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