Yu Qingshuai, Sun Zhenao, Han Yetong, Zhang Tuanlong, Zhang Rongxing, Lin Muhua
College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
Micromachines (Basel). 2025 May 31;16(6):665. doi: 10.3390/mi16060665.
While DC/DC converters for water electrolysis systems have been widely investigated, they inherently face a critical compromise between wide voltage regulation capabilities and dynamic response characteristics. This study is based on a two-stage hybrid topology (TSIB-TPLLC) that synergistically combines a two-phase interleaved buck converter with a three-phase LLC resonant converter to resolve this challenge. The first-stage interleaved buck converter enables wide-range voltage regulation while reducing input current ripple and minimizing intermediate bus capacitance through phase-interleaved operation. The subsequent three-phase LLC stage operates at a fixed resonant frequency, achieving inherent output current ripple suppression through multi-phase cancellation while maintaining high conversion efficiency. A dual-loop control architecture incorporating linear active disturbance rejection control (LADRC) with PI compensation is developed to improve transient response compared to conventional PI-based methods. Finally, a 1.2 kW experimental prototype with an input voltage of 250 V and an output voltage of 24 V demonstrates the converter's operational feasibility and enhanced steady-state/transient performance, confirming its suitability for hydrogen production applications.
虽然用于水电解系统的DC/DC转换器已得到广泛研究，但它们在宽电压调节能力和动态响应特性之间存在着固有的关键权衡。本研究基于一种两级混合拓扑结构（TSIB-TPLLC），该结构将两相交错降压转换器与三相LLC谐振转换器协同结合，以解决这一挑战。第一级交错降压转换器能够实现宽范围的电压调节，同时通过交错操作降低输入电流纹波并最小化中间总线电容。随后的三相LLC级在固定谐振频率下运行，通过多相抵消实现固有输出电流纹波抑制，同时保持高转换效率。与传统的基于PI的方法相比，开发了一种结合线性自抗扰控制（LADRC）和PI补偿的双环控制架构，以改善瞬态响应。最后，一个输入电压为250V、输出电压为24V的1.2kW实验原型展示了该转换器的运行可行性以及增强的稳态/瞬态性能，证实了其适用于制氢应用。
