A NOVEL REDUCED-SWITCH MLI TOPOLOGY FOR GRID TIED SOLAR-PV SYSTEM

Electrical & Electronics Engineering

Due to the depletion of conventional energy sources and environmental impacts, the role of renewable sources for energy generation has become a prior choice nowadays. A solar photovoltaic (PV) based micro-grid with a reduced-switch MLI topology has been presented. The proposed MLI topology is designed with the aim of reducing the number of switches and the number of dc voltage sources with modularity while having a higher number of levels at the output. For the determination of the magnitude of dc voltage sources and a number of levels in the cascade connection, three different algorithms are proposed. The optimization of the proposed topology is aimed at achieving a higher number of levels while minimizing other parameters. A detailed comparison is made with other comparable MLI topologies to prove the superiority of the proposed structure. A fundamental frequency PWM technique is used for pulses to the switches to achieve high-quality voltage at the output. Finally, the proposed 71-level RSMLI topology is designed by using cascading form of two basic 11-level RSMLI topologies to drive the micro-grid system powered by solar-PV system, simulated results are presented with proper comparisons

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