A NOVEL DOUBLE-SWITCHED CAPACITOR DC-DC CONVERTER SUITABLE FOR RENEWABLE ENERGY POWER GENERATION SYSTEM

Jia Haitao; Zhou Xiaoyan; Wang Helin; Lu Qingxuan; Hu Haoze; Tian Shuo

doi:10.19912/j.0254-0096.tynxb.2024-0770

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (9) : 678-687. DOI: 10.19912/j.0254-0096.tynxb.2024-0770

A NOVEL DOUBLE-SWITCHED CAPACITOR DC-DC CONVERTER SUITABLE FOR RENEWABLE ENERGY POWER GENERATION SYSTEM

Jia Haitao, Zhou Xiaoyan, Wang Helin, Lu Qingxuan, Hu Haoze, Tian Shuo

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Abstract

To make grid-connected power generation systems more compatible with photovoltaic, fuel cell, wind power and other clean energy power generation equipment, a coupled inductance DC-DC converter based on a new type of double-switched structure capacitor is proposed in this paper. The high gain, low loss and low switching voltage stress of the converter are realized by a novel double switched capacitor structure and a coupled inductance boost unit. Importantly, the voltage stress of the two power switches can be evenly distributed through the passive clamping circuit in the novel double-switched capacitor structure, thus reducing their peak voltages. At the same time, the leakage energy can be recovered and the efficiency of the converter can be improved. This paper introduces its operating mode and steady state analysis. The stresses and theoretical efficiency of the components are analyzed and compared with other DC-DC converters. Finally, according to the design criteria, a 200 W prototype was built in the laboratory to verify the effectiveness of the proposed converter.

Key words

renewable energy / DC-DC converter / clean energy generation / voltage gain / coupled inductor / clamping circuit

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Jia Haitao, Zhou Xiaoyan, Wang Helin, Lu Qingxuan, Hu Haoze, Tian Shuo. A NOVEL DOUBLE-SWITCHED CAPACITOR DC-DC CONVERTER SUITABLE FOR RENEWABLE ENERGY POWER GENERATION SYSTEM[J]. Acta Energiae Solaris Sinica. 2025, 46(9): 678-687 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0770

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