Single-Input Dual-Output Quadratic DC-DC Topology with Ultra-High Voltage Gain for Renewable Energy Applications

This study introduces an ultra-high-voltage gain (VG) DC-DC topology with dual output ports, featuring a quadratic-based structure tailored for renewable energy applications. The proposed design incorporates a coupled inductor (CI) combined with a quadratic boost stage to achieve substantial voltage elevation. Voltage gain is adjustable through two main standards: the duty cycle of the switches and the turn ratio of the dual-winding CI, enhancing design flexibility. Notable characteristics of this converter include its high VG, reduced voltage stress (VS) on switching elements,, common ground (CG) connection amid ports, and synchronized operation of switch. The merits of this configuration are underscored by comparative analysis with similar topologies. The converter's effectiveness is demonstrated through tests on a 440W prototype operating at a 50 kHz switching frequency, with a 20V input and equal output voltages of 240V.