Hydrogen production system control method self-adaptive to load fluctuation and related equipment

Through the adaptive load fluctuation hydrogen production system control method, using the time lag compensation factor and fuzzy PID control, the response problem of the hydrogen production system under rapid load fluctuation is solved, and a high-precision and stable hydrogen production process is achieved.

CN120758928AActive Publication Date: 2025-10-10CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO LTD
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Patent Information

Application Number
CN202511294232.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-11
Publication Date
2025-10-10
Estimated Expiration
2045-09-11

AI Technical Summary

Technical Problem

Existing hydrogen production systems have difficulty responding quickly to fluctuations in renewable energy loads, resulting in an imbalance in pressure and liquid level differences, affecting equipment safety and hydrogen production efficiency. Existing control methods such as PID control are prone to sudden changes in valve stroke under rapid load switching and are difficult to adapt to second-level load fluctuations.

Method used

A hydrogen production system control method with adaptive load fluctuation is adopted. By introducing a time-lag compensation factor and fuzzy PID control, combined with feedforward and fuzzy controllers, the opening of the pneumatic diaphragm valve on the hydrogen and oxygen side is adjusted in real time to offset communication delays and adapt to different working loads.

Benefits of technology

It significantly improves the system's response accuracy to rapid load fluctuations, improves the control accuracy and stability of the hydrogen production system, and ensures the safe and efficient operation of the system.

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Abstract

The invention provides a self-adaptive load fluctuation hydrogen production system control method and related equipment, and the method comprises the steps: obtaining the output current of a hydrogen production power supply and the internal and external pressure difference of a hydrogen-oxygen separator in real time, calculating the load change rate of an electrolytic cell according to the output current, and when the load change rate of the electrolytic cell is greater than or equal to a preset threshold value, calculating the load change rate of the electrolytic cell according to the output current; a time delay compensation factor is introduced to calculate the first opening degree of the hydrogen-oxygen side pneumatic diaphragm valve, and feedforward control is conducted on the hydrogen-oxygen side pneumatic diaphragm valve through an executing mechanism so that the hydrogen-oxygen side pneumatic diaphragm valve can meet the first opening degree; otherwise, the pressure difference and the load ratio of the electrolytic cell serve as input of the fuzzy controller, the second opening degree of the hydrogen-oxygen side pneumatic diaphragm valve is calculated according to output of the fuzzy controller, and fuzzy PID control is conducted on the hydrogen-oxygen side pneumatic diaphragm valve through the executing mechanism so that the hydrogen-oxygen side pneumatic diaphragm valve can meet the second opening degree. The control precision of the hydrogen production system can be improved, and stable operation of the hydrogen production system is guaranteed.
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