Grid interconnected H-bridge multilevel inverter for renewable power applications using repeating units and level boosting network

Abstract

In today's world, development in technology need good converters, among which multilevel inverter is the area to be focused as it minimizes the losses and reduces power quality issues. This research article proposes a grid connected H-bridge multilevel inverter for renewable applications. Which is interconnected to repeating units and level boosting network. The proposed system is developed to reduces the power losses as it is integrated with repeating units, which enhance the output voltage. Further reduction in power losses and increase in efficiency is achieved by generating intermediate levels with the help of level boosting network. The bidirectional flow of power is achieved with the help of grid interconnected H-bridge. The proposed multilevel inverter generates 4n + 3 number of output levels. The work is carried out using two repeating units and one level boosting network with grid integrated H-bridge for 11 levels. The main objective of the proposed method, to reduce number of switches and sources is achieved. Which influences the additional saving of generating power apart from renewable source. The analysis is carried out for different modes of operation and compared with other topologies using MATLAB Simulink.