An adaptive reconfigurable dc-dc converter for renewable energy applications

A new adaptive reconfigurable flyback dc-dc converter topology is provided that can be used in a wide range of applications including PV energy systems. It provides the ability for plug and play use, as the output power can be adjusted by varying the energy passing through the reconfigurable secondary winding. A variable turn´s ratio configuration adopted in the proposed converter can reduce secondary EMF and load voltage ripple under various conditions resulting in reduced stress on the output capacitor. Furthermore, the ability to vary the turn´s ratio allows the converter to shift between Discontinuous conduction mode and Continuous conduction mode depending upon various load requirements. This flexibility allows the converter to operate at higher efficiency. Its operation principles and variations are discussed and verified by simulation results.