A non-isolated high voltage gain DC-DC converter based hybrid switched LC network for renewable energy applications

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.