Summary In this article, a high step‐up interleaved boost converter topology is proposed for renewable energy applications. The proposed converter utilizes two‐phase interleaved configuration, to increase the power capability of converter while reducing the input current ripples. The output side formation enhances the voltage gain with the help of coupled inductors. It produces high voltage conversion ratio with least voltage stress on the switches. The switches are relieved from the voltage spikes by reclaim the energy leakage of the coupled inductors, which minimizes reverse recovery problem in diodes. The conduction losses of the switches are reduced due to small on state resistance. Finally, a prototype of 200 W proposed converter is developed in the laboratory to verify the both theoretical analysis and simulation results.

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This paper proposes a zero‐voltage switching high step‐up boost converter with coupled inductor for renewable energy applications. In this proposed circuit, main and auxiliary switches are turned ON at zero voltage switching to reduce switching losses. The voltage gain of the converter is increased by varying the turns ratio between primary and secondary of the coupled inductor (CI). The voltage spikes at the main switch are mitigated by using active clamping technique. The reverse recovery problem in diodes is alleviated due to leakage inductance of the CI. Zero current switching turn OFF in output diode is achieved, which can enhance the efficiency of the converter. A real‐time model for 100 W proposed converter circuit is developed to verify the theoretical analysis.