Abstract
The output voltage range of PV cells is widely influenced by the environment factors, such as temperature, solar radiation, etc. The lower output voltage of solar array can hardly meet the requirements for grid-connected operation of the system. To achieve high voltage gain and a steady ac output voltage in spite of the low dc input voltage, this paper presents a novel single-stage high gain current source inverter (CSI). The topology of the proposed inverter is derived from conventional tri-state current source inverter by introducing an impedance network with two symmetrical inductors and diodes separately. Theoretical analysis of operation modes and high voltage gain performance for the proposed inverter is presented, followed by the simulation of the proposed inverter in grid-connected photovoltaic (PV) system carried out on MATLAB.
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