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荆锴, 李方正, 吴依梦, 等. 基于LLC变换器供电的PEM电解槽阻抗谱在线评估方法[J]. 太阳能学报, 2025,46(6):196-202.
荆锴, 李方正, 吴依梦, et al. 基于LLC变换器供电的PEM电解槽阻抗谱在线评估方法[J]. 2025, 46(6): 196-202.
荆锴, 李方正, 吴依梦, 等. 基于LLC变换器供电的PEM电解槽阻抗谱在线评估方法[J]. 太阳能学报, 2025,46(6):196-202. DOI: doi:10.19912/j.0254-0096.tynxb.2024-0260.
荆锴, 李方正, 吴依梦, et al. 基于LLC变换器供电的PEM电解槽阻抗谱在线评估方法[J]. 2025, 46(6): 196-202. DOI: doi:10.19912/j.0254-0096.tynxb.2024-0260.
为评估可再生能源制氢系统中电解槽的性能
特别是电解槽电化学阻抗谱的性能分析
提出一种基于全桥LLC谐振变换器供电的质子交换膜(PEM)电解槽电化学阻抗谱的在线评估方法
该方法通过在稳定的直流电解电压的基础上施加一个小的交流电压扰动信号测得电流响应从而得到阻抗值。针对LLC谐振变换器提出逆变整流协同控制的策略
前级全桥变频控制获得稳定的直流电解电压
后级通过PWM整流控制叠加一个小的扰动信号。最后
通过快速傅里叶分析电压和电流信号的幅值和相位获得不同频率扰动信号下的阻抗值。仿真和实验结果表明所提方法得到的阻抗谱图和理论值基本匹配。
In order to evaluate the performance of the electrolyzer in renewable energy hydrogen production systems
especially the performance analysis of the electrochemical impedance spectrum(EIS) of the electrolytic cell
an online evaluation method for the electrochemical impedance spectrum of PEM electrolyzer powered by a full bridge LLC resonant converter is proposed. This method applies a small AC voltage disturbance signal on a stable DC electrolytic voltage to measure the current response and obtain the impedance value. A strategy of inverter rectification collaborative control is proposed for LLC resonant converters. The front stage full bridge variable frequency control obtains stable DC electrolytic voltage
and the post stage outputs a small disturbance signal through PWM rectification control. Finally
the impedance values under different frequency disturbance signals are obtained by analyzing the amplitude and phase of voltage and current signals using fast Fourier transform. The simulation and experiment results show that the impedance spectrum obtained by the proposed method is basically matched with the theoretical values.
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