-5KW固体氧化物燃料电池测试台监控单元设计与开发.docxVIP

本科生毕业论文题目： 5KW固体氧化物燃料电池测试台监控单元设计与开发 学 院 电子信息工程学院 学科门类 工学 专 业 自动化 学 号 2013442209 姓 名 李泽华 指导教师 高月华、李曦 2017年5月25日5KW固体氧化物燃料电池测试台监控单元设计与开发摘要为了SOFC能够稳定并高性能地长期工作，对于其常见的故障进行分析必不可少，而开展以上工作的前提便是电池在运行过程中各个性能参数的获取，因此便提出了本文研究重点——固体氧化物燃料电池测试台监控单元。首先对整个燃料电池系统进行数学建模分析；利用下位机PLC对空气流量、氢气流量、阴阳极燃料预热炉、电堆加热炉进行控制，通过RS-485通讯协议与上位机进行通讯；利用Fameview软件将各个反馈数据进行实时显示，并可以方便使用者对参数进行设定。PID参数调节是本次PLC设计的工作重心，通过使用PID指令向导对不同控制回路进行调节，在风机的整定过程中由于阻力阀的存在，直接使用PID控制不可行，本文的办法是分级赋给定参数，并找到从手动切换到自动控制的最优给定值。最终实现对燃烧室温度的稳定控制以及上位机的数据实时监控。关键词：SOFC；数学模型；测试系统；PLCDesign and development of monitoring Unit for 5KW solid oxide fuel cell test benchABSTRACTTo ensure the long-term stability and the high performance of SOFC, it is necessary to analysethe common fault of it.The premise of the above work is the acquisition of the battery performance parameterswhile in the process of the operation. In this case, the focus of the research was put forward in this paper——the monitoring unit of solid oxide fuel cell testinstrument.The first step is to creat and analyse the mathematical model of the wholesystem; Use PLC to control the air flow, hydrogen flow, preheating furnace of the anode and cathode fuel,stack heating furnace. It is connectedwith the host computer by RS-485 communication protocol; Display the feedback data in real-time and facilitate users to set parameters by using Fameview software.The adjustment of PID parameters is the focus of the PLC designing. By using the PID Instruction Wizard to adjust the different control loops. Due to the existence of the resistance valve, the direct use of PID control is not feasible during the tuning process of the blower. The method of this paper is to assign the given parameters and find the optimum given value of switching from manual control to automat