Advanced transformer less inverter for solar PV grid connected system

Advanced transformer less inverter with leakage current reduction is one of the option to meet the new power conversion technology in a reliable, affordable and sustainable way. The main objective of the design using Sinusoidal pulse width modulated switching technique (SPWM) is to minimize the leakage current to have an higher efficiency, smaller size, lighter weight, lower cost. Current study considered above factors and an effort has been made to arrive at optimal design of transformer less inverter in power grid. From the solar panel of 720V DC output is given to SPWM transformer less inverter of 250 kW. The inverter topology is a full bridge inverter with addition of two more switches in circuit. In order to simulate SPWM transformer less inverters of FB CCV (Full Bridge Constant Common Mode Voltage) and H6 topology, A MATLAB/Simulink software has been used.