Auto-Tuning Control of PEM Water Electrolyzer

IF 1 Q4 AUTOMATION & CONTROL SYSTEMS

Mechatronic Systems and Control Pub Date : 2019-11-26 DOI:10.1115/dscc2019-9156

A. Keow, Zheng Chen

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引用次数: 1

Abstract

Proton exchange membrane (PEM) electrolyzers with the ability to produce gases at a pressure suitable for direct metal hydride storage are desirable because they do not require the use of compressors and other auxiliary components. Direct storage into metal hydride cylinders is made feasible when the pressure and flow rate of hydrogen is controlled. The nonlinear dynamics of the PEM electrolyzer change with temperature and pressure, both of which change with the hydrogen production rate, and are thus difficult to estimate. Therefore, a model-free, relay-feedback, auto-tuning approach is used to tune a proportional integral (PI) controller. This allows for the determination of the voltage supply to the electrolyzer by tracking the current set-point and correlating it to the hydrogen production rate. A gain scheduling approach is used to record the tuned controller’s parameters at different set-points, minimizing the frequency of tuning the device. A self-assessment test is used to determine situations where the auto-tuner should activate to update the PI parameters, thus, allowing for the system to operate without supervision. The auto-tuning PI control is successfully tested with a PEM electrolyzer setup. Experimental results showed that an auto-tuner can tune the controller parameters and produce favorable transient behaviors, allowing for a degree of adaptability for variations in system set-points.

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PEM水电解槽的自动调谐控制

质子交换膜(PEM)电解槽具有在适合直接金属氢化物储存的压力下产生气体的能力，因为它们不需要使用压缩机和其他辅助部件，因此是理想的。在控制氢的压力和流量的条件下，直接储存在金属氢化物钢瓶中是可行的。PEM电解槽的非线性动力学随温度和压力的变化而变化，而温度和压力又随制氢速率的变化而变化，因此难以估计。因此，采用无模型、继电器反馈、自动调谐方法来调谐比例积分(PI)控制器。这允许通过跟踪电流设定值并将其与产氢速率相关联来确定电解槽的电压供应。采用增益调度方法记录调谐控制器在不同设定点的参数，使调谐设备的频率最小。自我评估测试用于确定应该激活自动调谐器以更新PI参数的情况，从而允许系统在没有监督的情况下运行。通过PEM电解槽设置成功地测试了自调谐PI控制。实验结果表明，自动调谐器可以调整控制器参数并产生良好的瞬态行为，从而对系统设定点的变化具有一定程度的适应性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Mechatronic Systems and Control AUTOMATION & CONTROL SYSTEMS-

CiteScore

1.40

自引率

66.70%

发文量

期刊介绍： This international journal publishes both theoretical and application-oriented papers on various aspects of mechatronic systems, modelling, design, conventional and intelligent control, and intelligent systems. Application areas of mechatronics may include robotics, transportation, energy systems, manufacturing, sensors, actuators, and automation. Techniques of artificial intelligence may include soft computing (fuzzy logic, neural networks, genetic algorithms/evolutionary computing, probabilistic methods, etc.). Techniques may cover frequency and time domains, linear and nonlinear systems, and deterministic and stochastic processes. Hybrid techniques of mechatronics that combine conventional and intelligent methods are also included. First published in 1972, this journal originated with an emphasis on conventional control systems and computer-based applications. Subsequently, with rapid advances in the field and in view of the widespread interest and application of soft computing in control systems, this latter aspect was integrated into the journal. Now the area of mechatronics is included as the main focus. A unique feature of the journal is its pioneering role in bridging the gap between conventional systems and intelligent systems, with an equal emphasis on theory and practical applications, including system modelling, design and instrumentation. It appears four times per year.