Water Electrolysis Hydrogen Damping Improvement by Hamiltonian Based Control

This paper presents an improved damping control strategy based on the Hamiltonian control law (HCL) for a two-phase interleaved buck converter in water electrolysis applications. The transient induced by renewable sources energy variation is still a challenge for hydrogen production. The proposed approach is designed to enhance the stability and efficiency of a proton exchange membrane (PEM) electrolyzer powered by a photovoltaic (PV) source. By leveraging HCL energy conservation principles, the control method enhances system stability, mitigates oscillations, and improves dynamic response under various operating conditions. The performance of the proposed control strategy was experimentally validated using a laboratory-scale PEM electrolyzer system. Comparative tests between HCL and conventional PI control were conducted under varying electrolyzer current reference. Results demonstrated that HCL control achieved superior damping characteristics, reducing voltage and current overshoot and improving settling time as compared to PI control. Additionally, the proposed method exhibited higher steady-state accuracy and better disturbance rejection, ensuring stable hydrogen production efficiency.