Abstract:
Digital twin technology based on sensing technology, Internet of Things technology and simulation modeling technology has become an advanced and feasible new technology that realizes the simulation comparison and deduction evaluation of real-state of physical entities through the integration of physical model and data-driven model. The alkaline water electrolyzer is a key device in the electrolysis hydrogen production system. Therefore, constructing its working characteristic model through digital twin technology to realize the application in characteristic simulation and state evaluation, is of great significance to not only the informatization and digitization of electrolyzer and but also the optimization of renewable energy power generation and hydrogen production system. Based on the characteristics test of alkaline water electrolyzer, combined with the working mechanism of hydrogen production system of the alkaline water electrolyzer, this paper establishes the digital twin model of the alkaline water electrolyzer impedance characteristic; Then, based on the established data-driven models, the characteristic parameters such as the total voltage, total current, and cell temperature will be selected as the observation variables. The data-driven model and the electrochemical mechanism model will be integrated to construct the digital twin system of alkaline water electrolyzer operating characteristics. Finally, based on Matlab/Simulink, the simulation of the digital twin model of alkaline water electrolyzer is realized, including the simulation model of the temperature rise, power regulation, hydrogen production efficiency and separator characteristics. Β© 2022, Electrical Technology Press Co. Ltd. All right reserved.
