Advanced Dual Boost Inverter with High Voltage Gain DC to DC topology for PV Applications

A novel dual boost inverter with high voltage gain DC to DC converter for PV system application is analyzed in this paper. This new topology comprises of modified Dickson charge pump based voltage multiplier circuit at the front end and dual boost inverter on its next end. The notable advantages of this proposed converter circuits are boosting the DC voltage levels and inversion of DC to AC with a cost effective structure. The output of a fundamental full-bridge inverter always appears to be less than the DC voltage input. In order to resolve this issue, DC chopper is added at the front end of the converter to boost the AC voltage comparatively greater than the DC input Voltage. The blend of front end chopper and inverter bestows to a two-stage power conversion process. The conventional boost inverter has drawbacks like poor efficiency, discontinuous current operation, requirement of large capacitors, large duty cycle and EMI issues. In this paper, the combination of the modified Dickson charge controller with dual boot inverter is proposed to acquire benefits like compact circuit structure, reduction in number of circuit components with boosting capability. The conventional full cycle modulation scheme in the dual boost inverter leads to operation of power devices at the higher frequency ranges through the full cycle. The voltage/current stress across the switching devices sequentially increases the losses associated with the circuit. So HCM modulation scheme is proposed to reduce the switching stress and switching losses. Furthermore, in order to address the current circulation losses, the clamping switches are added with the DBI inverter. The Dual boost inverter with modified Dickson charge voltage multiplier circuits are simulated and the hardware prototype model is also constructed to validate the simulation results.