Comprehensive Modeling of Single-Phase Quasi-Z-Source Photovoltaic Inverter to Investigate Low-Frequency Voltage and Current Ripple

Yushan Liu, Baoming Ge, Haitham Abu-Rub, Dongsen Sun

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

The second harmonic (2ω) power ripple of single-phase quasi-Z-source (qZS) photovoltaic (PV) inverter highly affects the whole system's design and performance. The topology's 2ω ripple model is very important to analyze qZS PV inverter's 2ω voltage and current ripple. The existing models did not consider the PV-panel dynamic and terminal capacitors, which causes the theoretical results apart from the truth. In this paper, a comprehensive modeling for single-phase qZS-PV inverter is proposed, where the 2ω ripple model of the qZS-PV inverter system with a real PV source is established and discussed without and with a PV terminal capacitor. The influences from qZS inductance and capacitance, and PV-panel terminal capacitance to the 2ω voltage and current ripple are investigated using the built model. The system parameter design method is proposed to mitigate this ripple. Simulation and experimental results validate the proposed 2ω ripple model and parameter design method.

Original languageEnglish
Article number6994221
Pages (from-to)4194-4202
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Volume62
Issue number7
DOIs
Publication statusPublished - 1 Jul 2015

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Electric potential
Capacitors
Capacitance
Inductance
Systems analysis
Topology

Keywords

  • AC small-signal model
  • low-frequency (LF) ripple
  • photovoltaic (PV) power system
  • quasi-Z source inverter (Qzsi)

ASJC Scopus subject areas

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

Cite this

Comprehensive Modeling of Single-Phase Quasi-Z-Source Photovoltaic Inverter to Investigate Low-Frequency Voltage and Current Ripple. / Liu, Yushan; Ge, Baoming; Abu-Rub, Haitham; Sun, Dongsen.

In: IEEE Transactions on Industrial Electronics, Vol. 62, No. 7, 6994221, 01.07.2015, p. 4194-4202.

Research output: Contribution to journalArticle

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