基于Hammerstein模型的PEM电解槽动态模型

Dynamic Modeling of PEM Electrolyzer Based on Hammerstein Model

随着可再生能源并网容量的增加,其发电间歇性、功率波动性等问题将显著影响供电系统稳定性,加剧能源供需矛盾。使用可再生能源制氢,实现间歇性能源的长期储存和运输,是可再生能源发展的重要方向,但其成本较高,技术尚未成熟,阻碍了其大型化、商业化发展。研究制氢设备在可再生能源复杂工况下的动态运行特性,可以为其容量优化配置,运行策略设计提供指导。本文在现有PEM电解槽静态模型研究的基础上,使用Hammerstein非线性结构和T-S模糊推理建立了描述PEM电解槽非线性动态特性的仿真模型,并通过实验验证了动态模型的准确性。其模型复杂度较低,参数辨识过程简单,对不同性能参数电解槽都具有较好的拟合特性,可用于可再生能源制氢系统的优化设计。

With the increase of renewable energy grid-connected capacity, the problems of intermittent power generation and power volatility will significantly affect the stability of power supply system and aggravate the contradiction between energy supply and demand. Hydrogen production using renewable energy is an important direction of development to realize the long-term storage and transportation of intermittent energy. For its high cost and immature technology, the commercialization is not widely promoted. A comprehensive study on the dynamic characteristics of the electrolyzer under complex working conditions of renewable energy can prompt the optimization of the capacity configuration and control strategy of the renewable energy system. In this study,a novel dynamic model of proton exchange membrane(PEM) electrolyzer is proposed based on the Hammerstein model combined with T-S fuzzy model and was validated by experiments. The results showed that the model proposed had good consistency with the experiments data and could be applied to different types of PEM water electrolyzer. With the uncomplicated parameters identification process, it can be an effective tool to optimize the renewable energy hydrogen production systems.