A PV/FC co-generation based micro-grid system using compact integrated 7- level inverter

Nowadays Renewable Energy Sources are getting widely used with the accumulation of demanded energy & concerns of the environmental impacts around the world. The hybrid generation units exerts the photo-voltaic/fuel cell are the main energy system to support the microgrid. This paper explores a unique hybrid power generation, which is compounded of a high step gain DC/DC converter, integrated to grid using seven-level inverter structure. The DC/DC converter interfaces a boost topology & converts the outcome voltage of the hybrid source into two independent voltage sources with a coordinated relationships using power transformer. This unique 7-level inverter structure is configured by selected capacitor unit of DC/DC converter into 3-level DC voltages & the full bridge structure connected as cascaded form. The selected capacitor unit converts the dual outcome voltage sources of DC/DC converter into a 3-level DC voltage and, the full-bridge converter further converts the three level DC voltage to seven level AC voltage. In this process, the proposed concept provides a sinusoidal current is in-phase with the grid voltage & interfaced into utility grid. The salient features of the intended 7-level inverter require only six switches & unique switching at respective high frequency with low harmonized & also qualitated output voltage. A simulink model is implemented to verify the performance evaluation of proposed scheme using Matlab/Simulink platform, results are conferred.