This paper presents a new high voltage gain DC–DC converter for renewable energy applications without the need for a galvanic isolation. The converter combines the active switched‐inductor network and the switched‐capacitor network to boost the voltage gain ratio without a high duty ratio. The presented converter uses clamping capacitors to minimize the maximum voltage stress of the power‐switching devices; hence, low power rating devices can be employed. Furthermore, the converter operates at a high switching frequency. Therefore, the use of small inductors and capacitors is the main advantage. The paper describes in detail the operating mode and design procedures of the converter. Additionally, the associated power losses and the efficiency are calculated. A 200‐W laboratory prototype was fabricated, and experimental results verified the theoretical analysis.

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In this paper, a dual-input full-bridge currentsource isolated dc/dc converter is proposed to combine the Photovoltaic (PV) system with the Energy Storage System (ESS). The proposed converter utilizes a full-bridge as the primary side, and the Quasi-Switched-Capacitor circuit as the secondary side. Compared to other multiple-input dc/dc converters with galvanic isolation function, the proposed converter utilizes less number of switches and passive components, reduces voltage stress on switches, and can achieve a high efficiency at a high switching frequency. The operation principle of the converter is presented, and a power sharing strategy between two input sources is proposed. A 2.0 kW, 1 MHz, 40 V/ 400 V prototype utilizing Gallium Nitride (GaN) switching devices is built in the lab, and experimental results show that a peak efficiency of 95.9% is achieved at 500 kHz.