DESIGN AND ANALYSIS OF MODULAR MULTILEVEL INVERTER FOR SOLAR PHOTOVOLTAIC APPLICATIONS

In this paper, we introduces a modular multilevel converter fed from solar cell which is used to reduce the number of semiconductor Switches. MMC intends design in both control and power circuits to provide corresponding output voltage levels by appropriate switching sequences. Hence to obtain a 15-level converter, the conventional method requires 28 switches and in binary mode 12 switches are needed. In trinary mode with the same 12 switches, 27 levels can be obtained whereas in Modular Multilevel Converter only 7 switches are employed to achieve 15 levels. This converter can be used to integrate the Photovoltaic system into Grid, with satisfying the grid requirements such as frequency,phase angle and amplitude of the Grid voltage. Fifteen level proposed Modular Multilevel Converter is simulated using Matlab/Simulink environment and the corresponding results are presented in this paper.