Open AccessDesign and Development of Grid-connected Quasi-Z-Source PV Inverter
Author(s) -
Zulhani Rasin,
M.F. Rahman,
Maaspaliza Azri,
Hairul Nizam Talib,
Auzani Jidin
Publication year - 2018
Publication title -
international journal of power electronics and drive systems (ijpeds)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.322
H-Index - 21
ISSN - 2088-8694
DOI - 10.11591/ijpeds.v9.i4.pp1989-2005
Subject(s) - inverter , photovoltaic system , grid connection , computer science , z source inverter , grid tie inverter , voltage , grid , maximum power point tracking , topology (electrical circuits) , controller (irrigation) , voltage source , control theory (sociology) , electrical engineering , engineering , control (management) , mathematics , agronomy , geometry , artificial intelligence , biology
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.