质子交换膜燃料电池分数阶建模与仿真
摘要质子交换膜燃料电池分数阶建模与仿真当今社会能源紧缺，以及传统能源带来的环境污染、空气破坏等问题急需新的能源来代替。质子交换膜燃料电池（PEMFC）有好的稳定性、功率密度高、启动和响应快的优点使得人们对它的关注越来越多。64482
研究表明，温度对电堆的输出特性具有重要的影响，但是近年来对于燃料电池的研究都是整数阶的，没有考虑其分数阶特性。本文的主要内容就是建立温度的整数阶模型与分数阶模型，将之对比。步骤如下：
（1）根据电堆热量分布情况，建立各个部分热量损耗的数学模型，将这些模块整合，搭建PEMFC温度整数阶机理模型，得到电堆温度特性的仿真结果。
（2）电堆温度在PEMFC发电的过程中，温度的扩散是呈现分数阶变化的。本文将此模块设定为分数阶。由分数阶理论和温度的机理模型搭建matlab/SIMULINK仿真模型，仿真结果和整数阶仿真结果进行比较，结果显示分数阶的图形曲线更加丰富，也更加接近实际情况，仿真结果更精确。
（3）在本文中建立的是温度的静态模型，分析电堆温度在发生变化到稳定的过程中，各部分热量消耗，以及温度模型分别在分数阶和整数阶形式，温度逐渐稳定的过程中对电特性输出电压的影响。
毕业论文关键词 质子交换膜燃料电池 分数阶建模 温度模型 仿真
毕业设计说明书（论文）外文摘要
Title Fractional modeling and Simulating of proton exchange membrane fuel cells
Abstract
Nowadays energy shortage is a more and more serious problem in our society.environmental pollution and air damage caused by traditional energy is in urgent need of new energy.Proton exchange membrane fuel cell(PEMFC) has many advantages,such as good stability,high power desity and fast response ,which makes it possible to attract more and more attention.
According to the research ,temperature has important influence on the output characteristics of the stack. But in recent years, researches on fuel cells is almost in integer order,Without considering the fractional characteristics . The most important part of this paper is the comparison between the integer order model and the fractional order model. The steps are as follows:
(1)According to the distribution of the heat stack, we can set up the mathematical model of heat loss of each part. Then we can build the integral order temperature model of PEMFC. The fitting formula of the optimum working temperature is obtained.
(2) The stack temperature in the PEMFC generation process , the diffusion is fractional.In this paper,This module is set to fractional order model . Then we can build the matlab/SIMULINK circuit with the fractional theory and the temperature mechanism model.The simulation results are compared with the integer order simulation results, the results shows that curve graph of fractional order is more rich, more close to the actual situation, the simulation results are more accurate.
Based on the analysis of the static model of temperature,we can get the stack temperature changes of the stable process,the heat consumption, as well as the temperature model respectively in the fractional and integer order form,the influence that temperature changes when voltage of the output electrical characteristics varies gradually.
Keywords PEMFC fractional modeling temperature model simulation
1 引言 2
1.1 题目背景及意义 2