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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Muhammed Fazlur Rahman
University of New South Wales
Control & Systems Engineering Electrical & Electronics Engineering

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Design and Development of Grid-connected Quasi-Z-Source PV Inverter Zulhani Rasin; Muhammed Fazlur Rahman; Maaspaliza Azri; Md Hairul Nizam Talib; Auzani Jidin
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 9, No 4: December 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1464.401 KB) | DOI: 10.11591/ijpeds.v9.i4.pp1989-2005

Abstract

An inverter system applied with the PV source typically has a problem of lower input voltage due to constraint in the PV strings connection. As a countermeasure a DC-DC boost converter is placed in between to achieve a higher voltage at the inverter DC link for connection to the grid and to realize the MPPT operation. This additional stage contributes to losses and complexity in control thus reducing the overall system efficiency. This work discussed on the design and development of a grid-connected quasi-Z-source PV inverter which has different topology and control method compared to the conventional voltage source inverter and able to overcome the above disadvantages. Modelling and performance analysis of the voltage and current controller to achieve a good power transfer from the PV source, as well sycnchronization with the grid are presented in detail. Results from both simulation and experimental verification demonstrate the designed and developed grid-connected qZSI PV inverter works successfully equivalent to the conventional voltage source inverter system.
Photovoltaic Emulator for Grid-connected Quasi-Z-Sorce Inverter Zulhani Rasin; Muhammed Fazlur Rahman; Maaspaliza Azri; Md Hairul Nizam Talib; Auzani Jidin
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 9, No 4: December 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1283.817 KB) | DOI: 10.11591/ijpeds.v9.i4.pp1976-1988

Abstract

The performance of PV panel is very much dependent on the amount of sun light as well as the temperature of the surrounding environment which normally hard to be predicted. The use of PV emulator in the investigation of solar inverter especially at a lab scale platform helps to mitigate the inconsistency factors due to this uncontrollable variation. This work discussed on the design and development of a PV emulator for the grid-connected quasi-Z-source inverter which has different topology and control method compared to the conventional voltage source inverter. The I-V characteristics of the PV panel is modelled from the commercially available product and through circuit analysis the relation between capacitor voltage control and the PV terminal voltage is established, thus realizing the MPPT operation. Results from both simulation and experimental verification demonstrated that the PV emulator successfully able to produce power for the inverter according to the requirement.
Co-Authors Auzani Jidin Maaspaliza Azri Md Hairul Nizam Talib Zulhani Rasin