SOFT SWITCHING HIGH STEP-UP DC-DC CONVERTER BASED ON QUASI-Z SOURCE

Zhao Zhenwei; Zhang Min; Jia Haitao; Xue Pengfei; Ye Ruiming; Dong Jingwen

doi:10.19912/j.0254-0096.tynxb.2022-0989

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (10) : 120-128. DOI: 10.19912/j.0254-0096.tynxb.2022-0989

SOFT SWITCHING HIGH STEP-UP DC-DC CONVERTER BASED ON QUASI-Z SOURCE

Zhao Zhenwei, Zhang Min, Jia Haitao, Xue Pengfei, Ye Ruiming, Dong Jingwen

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Abstract

In order to output stably the high DC voltage required by the inverter bus stably, the photovoltaic system needs a high step-up DC-DC converter to improve the voltage level of photovoltaic modules. Therefore, a quasi-Z source soft switching high step-up DC-DC converter is designed in this paper. The converter can be used in the photovoltaic system. Based on the quasi-Z source framework, active switches are used to replace diodes, and coupled inductors and switched capacitor modules are embedded in the quasi-Z source framework to achieve the soft switching operation, high voltage gain and high efficiency. This paper introduces the working principle of the converter, analyzes the performance under steady state, compares its performance other converter, and verifies the correctness of the analysis with the modeling simulation and prototype experiment.

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DC-DC converters / photovoltaic modules / soft switching / high step-up / quasi-Z source

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Zhao Zhenwei, Zhang Min, Jia Haitao, Xue Pengfei, Ye Ruiming, Dong Jingwen. SOFT SWITCHING HIGH STEP-UP DC-DC CONVERTER BASED ON QUASI-Z SOURCE[J]. Acta Energiae Solaris Sinica. 2023, 44(10): 120-128 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0989

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