摘要燃料电池作为一种新型的发电技术，能有效的解决目前存在的能源问题和环境污染问题。影响质子交换膜（PEMFC）的因素有很多，如负载、膜湿度、气压、温度等。其中温度对电压的输出特性有着非常重要的影响。由于电容的变化过程和温度的扩散过程是呈现分数阶特性的。因此本文进行了PEMFC分数阶的电特性模型和温度模型仿真。22884
本文首先研究了分数阶的基本定义和性质，为本文的后续工作做铺垫。然后分析了PEMFC的原理，由于极化活化过电压的变化存在分数阶特性，分数阶模型能更好的描述PEMFC的电压变化情况，建立其分数阶电特性模型并仿真，可以看到结果与实际更加吻合。其次，由于温度的扩散存在分数阶特性，建立PEMFC分数阶温度模型并仿真，由仿真图形能看出分数阶模型能更好的拟合与实际的数据。最后，得到分数阶模型能更准确的描述PEMFC的电容变化和温度扩散的实际情况的结论，为今后的研究提供一种新的思路。
关键词 质子交换膜燃料电池 模型 分数阶
毕业设计说明书（毕业论文）外文摘要
Title Fractional modeling and Simulating of proton exchange membrane fuel cells .
Abstract
As a new type of the power generation technology, the fuel cell can effectively solve the energy problems and environmental pollution problems that currently exist. There are many factors affecting the proton exchange membrane (PEMFC), such as the load current, the membrane humidity, the barometric pressure and the temperature. Wherein the temperature of the output voltage characteristics have a very significant impact. Because the change process and the temperature diffusion process is presented as the fractional capacitance characteristics. Therefore, this paper carried out to simulate the fractional electrical characteristics model and the fractional temperature model.
Firstly, this paper studied the basic definitions and properties of fractional order, laying the groundwork for the follow-up article. Then it analyzes the principle of PEMFC. Due to the activation polarization voltage changes over the existence of fractional properties, the fractional voltage change model can better describe the PEMFC. And establish its fractional electrical characteristics models and simulation, we can see the actual results are more consistent. Second, due to the existence of fractional diffusion temperature characteristics, then establish the PEMFC fractional temperature model and simulation, graphics can be seen from the simulation of the fractional model that can better fit with the actual data. Finally, the fractional model can more accurate to describe the actual situation of the change in the capacitance and the temperature diffusion. It provides a new way of thinking for the future research.
Keywords proton exchange membrane fuel cell Mathematical Model Fractional Order
目次
1 绪论 1
1.1 研究背景和意义 1
1.2 研究现状 1
1.3 本文主要研究内容 2
2 分数阶微积分 4
2.1 分数阶微积分的定义 4
2.2 分数阶微积分的性质 6
2.3 分数阶微积分的Laplace变换 6
2.4 分数阶微积分的Fourier变换 8
2.5 分数阶微分方程和传递函数 10
3 PEMFC电特性模型 12
3.1 PEMFC原理 12
3.2 电化学电动势 13
3.3 极化电压 14
3.4 PEMFC电特性的等效电路模型 18
3.5 PEMFC电特性模型Matlab仿真 19 PEMFC质子交换膜燃料电池分数阶建模和仿真:http://www.751com.cn/zidonghua/lunwen_15718.html