基于二进制序列的燃料电池宽频带EIS测试  

BROADBAND EIS TEST OF FUEL CELL BASED ON BINARY SEQUENCES

作　　者：金致含 苏建徽[1,2] 施永[1,2] 汪海宁 Jin Zhihan;Su Jianhui;Shi Yong;Wang Haining(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;Photovoltaic System Engineering Research Center of the Ministry of Education(Hefei University of Technology),Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]光伏系统教育部工程研究中心(合肥工业大学),合肥230009

出　　处：《太阳能学报》2022年第7期1-8,共8页Acta Energiae Solaris Sinica

基　　金：中央科研基本业务费(PA2018GDQT0021)。

摘　　要：目前电化学阻抗谱广泛应用于燃料电池故障诊断。针对诊断设备成本高昂的问题,提出集成在燃料电池系统DC/DC变换器的EIS测试方法,将激励信号在变换器双闭环控制的参考信号上分别施加干扰,实现了燃料电池电流和电压宽频带的在线扰动。为实现快速测试,采用一种伪随机二进制序列作为激励信号,可同时满足频率宽度和功率强度需求。实验采用Matlab/Simulink建模仿真,通过硬件在环实验验证,测试方法满足时间和精度要求,可通过嵌入式系统实现在线测试。Currently,electrochemical impedance spectroscopy is widely used for fault diagnosis of fuel cells.In view of the high cost of diagnostic equipment,an EIS test method integrated in the DC/DC converter of the fuel cells system is proposed.An excitation signal is applied to the reference signals for dual-loop control of the converter separately.It causes broadband online disturbances of fuel cells’current and voltage.For faster testing,a kind of pseudo-random binary sequence is designed as the excitation signal to meet the needs of bandwidth and power intensity.The experiment uses MATLAB/Simulink for modeling and simulation,and is verified by hardware-in-theloop experiments.This method meets the requirements of time consumption and high accuracy,and online testing can be realized through embedded systems.

关 键 词：燃料电池 故障诊断 电化学阻抗谱 二进制序列 

分 类 号：TM911.4[电气工程—电力电子与电力传动]