光伏电解水制氢典型工况及质子交换膜电解堆性能衰减研究  

Study on Typical Working Conditions of Hydrogen Production by Photovoltaic Electrolysis of Water and Performance Degradation of Proton Exchange Membrane Electrolytic Stacks

作　　者：徐衍会[1] 陈浩维 胡俊杰 Xu Yanhui;Chen Haowei;Hu Junjie(School of Electrical and Electronic Engineering,North China Electricity Power University,Beijing102206,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《电工技术学报》2024年第19期6228-6243,共16页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划资助项目(2021YFB4000104)。

摘　　要：电解水制氢可用于光伏出力消纳和绿氢制备,但目前尚缺乏模拟测试光伏电解水制氢电解堆典型应用场景下的工作模式,即电解堆典型工况,无法为电解堆性能衰减测试提供输入条件。该文提出了一种电解水制氢典型工况的提取方法,首先采用经验小波变换对光伏出力进行时频域分析,提取分时波动特征。然后用改进加权模糊聚类方法获得典型的光伏出力曲线。最后利用工况指标重构出简化工况曲线,并得到对电解堆运行场景模拟的循环工况谱。以我国“三北”地区某光伏电解水制氢系统作为算例,通过波动特征提取,获得了电解堆的典型工况。经初步仿真分析,提取的典型工况较好地刻画了电解堆的性能衰减过程。The photovoltaic(PV)power generation is greatly influenced by weather factors and has great fluctuation.Hydrogen production equipment by electrolysis of water,especially proton exchange membrane(PEM)electrolytic stacks,has the characteristics of fast power response and wide power range,and is very suitable for absorbing PV output with strong fluctuation and preparing green hydrogen.However,at present,there is little research on the performance change of electrolytic stacks under fluctuation power input,and there is a lack of working modes to simulate and test the typical application scenario of electrolytic stacks,which can not provide typical input conditions for the performance attenuation test of electrolytic stacks.Therefore,an extraction method of typical working conditions of PV electrolytic water hydrogen production was put forward in this paper,which can obtain the typical working conditions curve reflecting the performance attenuation characteristics of electrolytic stacks under PV fluctuation input.Firstly,empirical wavelet transform(EWT)was used to analyze the initial PV output curves in time and frequency domain,and PV output components with different fluctuation frequencies were separated.Secondly,the fluctuation characteristics of different time periods weredefined and extracted to reduce the dimension of the output curves.Thirdly,the weighted fuzzy clustering method was used to reduce the scenes of many fluctuation feature sequences,and typical PV output scenes were obtained.Finally,according to the characteristic sequence,the working condition indexes are set and the simplified working condition curves are reconstructed,and the cycle working condition spectrum of the electrolytic stacks was obtained.A PV water electrolysis hydrogen production system in the"Three North"area of China was selected as an example,and the PV output data with 1 minute resolution in three years were analyzed.The frequency band number N of EWT was selected as 5,and the initial data curves were decomposed into five componen

关 键 词：电解水制氢 经验小波变换 模糊聚类 典型工况 

分 类 号：TM615[电气工程—电力系统及自动化] TK91[动力工程及工程热物理]