Constant boost control with third harmonic injection for quasi-Z source inverter used in PV grid-connected system

Zhengyu Zhao, Mohammed A. Elgendy, Matthew Armstrong, Musbahu Muhammad

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

Compared to the dual-stage inverter, quasi-Z-source inverter (qZSI) offers higher reliability and lower switch count but suffers from higher voltage stress on components. The qZSI is normally controlled by the simple boost control (SBC) method that adds reference signals to the sinusoidal PWM to generate the shoot-through state. This paper develops a constant boost control method with third harmonic injection. Compared to the SBC, the proposed control method increases the voltage boost and reduces the voltage stress on switches and passive components of the qZSI, making it suitable for PV grid-connected applications. The third harmonic signal is produced and injected in a way that keeps it in phase with the reference sinusoidal signals, regardless of the solar irradiance level. This reduces the total harmonic distortions (THD) and improves the output power quality. Simulation results are presented for validation of the theoretical analysis and controller design.
Original languageEnglish
Title of host publication2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe
PublisherIEEE
ISBN (Print)9789075815306, 9789075815313
DOIs
Publication statusPublished - 1 Sep 2019
Event21st Conference on Power Electronics and Applications (and Exhibition) - Genova, Italy
Duration: 2 Sep 20195 Sep 2019

Publication series

Name2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe

Conference

Conference21st Conference on Power Electronics and Applications (and Exhibition)
Abbreviated titleEPE 2019 ECCE
CountryItaly
CityGenova
Period2/09/195/09/19

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  • Cite this

    Zhao, Z., Elgendy, M. A., Armstrong, M., & Muhammad, M. (2019). Constant boost control with third harmonic injection for quasi-Z source inverter used in PV grid-connected system. In 2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe (2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe). IEEE. https://doi.org/10.23919/EPE.2019.8915379