Performance analysis of a modernized Z-source inverter for robust boost control in photovoltaic power conditioning systems

Subhani, Nafis, Kannan, Ramani, Mahmud, Md Apel and Romlie, Mohd Fakhizan 2019, Performance analysis of a modernized Z-source inverter for robust boost control in photovoltaic power conditioning systems, Electronics, vol. 8, no. 2, pp. 1-17, doi: 10.3390/electronics8020139.

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Title Performance analysis of a modernized Z-source inverter for robust boost control in photovoltaic power conditioning systems
Author(s) Subhani, Nafis
Kannan, Ramani
Mahmud, Md ApelORCID iD for Mahmud, Md Apel orcid.org/0000-0002-5302-5338
Romlie, Mohd Fakhizan
Journal name Electronics
Volume number 8
Issue number 2
Article ID 139
Start page 1
End page 17
Total pages 17
Publisher MDPI
Place of publication Basel, Switzerland
Publication date 2019-02
ISSN 2079-9292
2079-9292
Keyword(s) photovoltaic (PV) system
boost factor
Z-source inverter
shoot-through
switched inductor
Science & Technology
Technology
Engineering, Electrical & Electronic
Engineering
Summary In this paper, the performance of a new Z-source inverter (ZSI)-based single-stage power conditioning system (PCS) is analyzed for a standalone photovoltaic (PV) power generation system. The proposed ZSI-based PCS includes two main parts: one is the input from PV units and the other is the ZSI. In this work, a new topology, termed the switched inductor-assisted strong boost ZSI (SL-SBZSI), is introduced for improving the performance of the PCS. The proposed topology shows high boosting capability during the voltage sag in PV units due to variations in solar irradiation and temperature. Another key advantage is the reduced capacitor voltage stress and semiconductor switch voltage stress of the inverter bridge, which ultimately minimizes the size and cost of the single-stage PCS. The proposed ZSI topology falls under the doubly grounded category of inverter by sharing the common ground between the input and output. This is an additional feature that can minimize the leakage current of PV units at the ac output end. The operational principles, detailed mathematical modeling, and characteristics of the proposed SL-SBZSI for a standalone photovoltaic (PV) power generation system is presented in this paper for analyzing performance. The simulation results, which are performed in MATLAB/Simulink, demonstrate the improved performance of the proposed SL-SBZSI for the standalone PV system. The performance of the proposed topology is also evaluated through an experimental validation on a laboratory-based PV system.
Language eng
DOI 10.3390/electronics8020139
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2019, the authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30121839

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