Generation of input spectrum for electrolysis stack degradation test applied to wind power PEM hydrogen production

Hydrogen production by proton exchange membrane electrolysis has good fluctuation adaptability,making it suitable for hydrogen production by electrolysis in fluctuating power sources such as wind power.However,current research on the durability of proton exchange membrane electrolyzers is insufficient.Studying the typical operating conditions of wind power electrolysis for hydrogen production can provide boundary conditions for performance and degradation tests of electrolysis stacks.In this study,the operating condition spectrum of an electrolysis stack degradation test cycle was proposed.Based on the rate of change of the wind farm output power and the time-averaged peak-valley difference,a fluctuation output power sample set was formed.The characteristic quantities that played an important role in the degradation of the electrolysis stack were selected.Dimensionality reduction of the operating data was performed using principal component analysis.Clustering analysis of the data segments was completed using an improved Gaussian mixture clustering algorithm.Taking the annual output power data of wind farms in Northwest China with a sampling rate of 1 min as an example,the cyclic operating condition spectrum of the proton-exchange membrane electrolysis stack degradation test was constructed.After preliminary simulation analysis,the typical operating condition proposed in this paper effectively reflects the impact of the original curve on the performance degradation of the electrolysis stack.This study provides a method for evaluating the degradation characteristics and system efficiency of an electrolysis stack due to fluctuations in renewable energy.

电解水制氢在电厂和氢能项目的设计应用

[目的]电解水制氢技术已普遍应用于燃煤电厂、燃气电厂和核电厂,也将更多地应用于可再生能源发电厂配套的氢能项目,有必要对制氢系统设计方案进行探讨。[方法]以某燃煤电厂和风力发电及太阳光伏发电厂配套氢能项目为例,依据相关标准规范的设计规定,阐述了相应的电解水制氢系统设计方案。[结果]碱性电解水制氢技术成熟、安全可靠,能为电厂氢冷发电机、加氢站和氢气用户持续提供满足纯度、湿度要求的氢气。[结论]文章旨在为更多电厂和氢能项目电解水制氢系统的设计提供可参考的方案。