Abstract—Nowadays, more and more distributed generations and renewable energy sources, such as wind, solar and tidal power, are connected to the public grid by the means of power inverters. They often form microgrids before being connected to the public grid. Due to the availability of high current power electronic devices, it is inevitable to use several inverters in parallel for high-power and/or low-cost applications. So, inverters should be connected in parallel to provide system redundancy and high reliability, which are important for critical customers. This paper presents a new structure based on combination of extended-boost quasi z-source converters and parallel inverters to increase the output voltage in a wide range, usable in photovoltaic (PV) systems. Additionally, the proposed inverter has all the advantages of parallel power converters. The proposed topology and its performances are validated using simulation results which are obtained in Matlab/Simulink.

 

Index Terms—voltage gain, parallel operation, Z-source inverter (ZSI), extended boost quasi Z-source inverter (EBQZSI), modulation index

Cite: Ali Zakerian and Daryoosh Nazarpour, "Parallel Operation of Extended Boost Quasi Z-Source Inverters for Photovoltaic System Applications," International Journal of Electronics and Electrical Engineering, Vol. 4, No. 1, pp. 17-23, February 2016. doi: 10.18178/ijeee.4.1.17-23