MPPT with bi-directional DC-DC converter and multi-level inverter for grid connected hybrid system

The objective of the work is to satisfy the load demand without interruption by managing the power flow using maximum power point tracker (MTTP). Power flow management from various renewable sources is proposed, which directs surplus power into the grid and charges the battery when required. In the proposed hybrid system multi-input transformer is coupled with a bidirectional buck boost converter and a multilevel inverter. This proposed five level inverter reduces the harmonics and switching losses and thereby improves the efficiency of the system. It produces a step signal with reduced number of switches used when compared to conventional system. Simulation analysis has been done using MATLAB/Simulink and has proved that there is reduction in harmonics. Hardware setup is also implemented for the grid connected hybrid system with multilevel inverter.