碱性电解槽运行特性数字孪生模型构建及仿真

Construction and Simulation of Operation Digital Twin Model for Alkaline Water Electrolyzer

基于传感技术、物联网技术、仿真建模技术的数字孪生技术通过物理模型与数据驱动模型的融合,已成为一种实现物理实体的真实状态仿真比对与推演评估的先进且可行的新技术。碱性电解水制氢槽是电解水制氢系统中的关键设备,基于数字孪生技术构建碱性电解槽运行特性模型,实现其特性仿真与状态评估中的应用,对电解槽的信息化、数字化及对可再生能源发电制氢系统的整体优化具有重要意义。该文首先基于碱性电解槽相关试验及制氢机理,建立了碱性电解槽阻抗特性数字孪生模型;然后选择电解槽总电压、总电流及槽体温度等特性表征参数作为观测变量,融合数学驱动模型和电化学机理模型,构建碱性电解槽运行特性数字孪生体系统;最后基于Matlab/Simulink实现碱性电解槽数字孪生模型的仿真,主要包括温升特性仿真模型、功率调节仿真模型、产氢效率仿真模型和分离罐特性仿真模型。

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.