A New Quadratic DC/DC Converter With Ultrahigh Voltage Gain

In this article, a new ultrahigh voltage gain coupled-inductor-based dc–dc converter is proposed for renewable energy generation systems. In this suggested circuit, a coupled-inductor combined with a quadratic boost circuit and voltage multiplier cell is used to increase the step-up voltage gain. The salient features of the proposed topology are its ultrahigh voltage gain, low reverse recovery in diodes, low voltage stress across switching devices, continuous input current, and common ground between the input source and output load. The integrated coupled inductor also minimizes power dissipation in magnetic components by sharing the high dc source current with another input inductor. Moreover, the proposed topology uses regenerative clamp circuits to mitigate voltage stresses across power switches operated in simultaneous switching. The theoretical analysis along with the operating principle, steady-state analysis, and the efficiency study of the proposed topology are discussed in detail. Finally, the performance of the proposed topology is verified using a 200-W, 25-V/400-V laboratory prototype.