为满足高效电解水制氢系统对低电流纹波、大输出电流和低输出电压的电能需求,提出一种基于耦合电感的高降压比交错型DC/DC变换器。该变换器采用飞跨电容结构,能够将功率器件的最大电压应力有效限制在输入电压的一半,从而提升系统的安全性和可靠性。通过耦合电感的分时复用方式,变换器实现了软开关操作,显著降低了开关频率下的开关损耗。此外,交错设计进一步减少了输出电流纹波,有效改善了系统的动态响应和稳定性。最后,仿真和实验结果表明,所提变换器具备软开关、低电流纹波和低输出电压等优异特性,能够满足高效制氢系统对电能质量的严格要求。
Abstract
To address the stringent power requirements of high-efficiency electrolysis-based hydrogen production systems, which demand low current ripple, high output current, and low output voltage, this paper presents a high step-down ratio interleaved DC/DC converter utilizing coupled inductors. The proposed converter incorporates a flyback capacitor structure, effectively limiting the maximum voltage stress on the power devices to half of the input voltage, thereby improving system safety and reliability. Through the implementation of time-division multiplexing with coupled inductors, the converter achieves soft-switching operation, which significantly reduces switching losses at high frequencies. Additionally, the interleaved design mitigates output current ripple, thereby enhancing dynamic performance and system stability. Simulation and experimental results corroborate that the proposed converter exhibits superior soft-switching characteristics, minimal current ripple, reduced output voltage, and satisfies the stringent power quality standards required for high-efficiency hydrogen production systems.
关键词
高增益 /
电制氢 /
电压应力 /
关断损耗 /
交错并联
Key words
high gain /
electrohydrogen production /
voltage stress /
turn-off loss /
interleaved parallel connection
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基金
河北省自然科学基金（E2021208008）
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