Hybrid pulsewidth modulated single-phase quasi-Z-source grid-tie Photovoltaic power system

Yushan Liu, Haitham Abu-Rub, Baoming Ge

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Citations (Scopus)

Abstract

A hybrid pulsewidth modulated single-phase quasi-Z-source inverter (qZSI) based grid-tie Photovoltaic (PV) power system is proposed. The hybrid pulsewidth modulation (HPWM) conducts PWM when the required ac output voltage is lower than the dc source voltage, otherwise it performs pulse-amplitude modulation (PAM) for the single-phase qZSI. The low-frequency ripple voltage of dc link is utilized, resulting in reductions of quasi-Z-source inductance and capacitance, as well as power devices' switching actions. Control strategy of the proposed system is further presented to track the maximum power points of the PV panel and to inject the extracted PV power into grid. A grid-tie current controller, combining with the plug-in repetitive control and proportional-resonant regulator, is employed to achieve strong harmonic suppression, fast convergence, and zero tacking error. The system dynamic model is disclosed to design controllers. Simulation and experimental results demonstrate validity of the proposed system.

Original languageEnglish
Title of host publicationAPEC 2015 - 30th Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1763-1767
Number of pages5
EditionMay
ISBN (Electronic)9781479967353
DOIs
Publication statusPublished - 8 May 2015
Externally publishedYes
Event30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 - Charlotte, United States
Duration: 15 Mar 201519 Mar 2015

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
NumberMay
Volume2015-May

Conference

Conference30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015
Country/TerritoryUnited States
CityCharlotte
Period15/03/1519/03/15

Keywords

  • photovoltaic power conversion
  • pulsewidth modulation
  • quasi-Z-source inverter
  • single-phase grid-tie control

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