文档介绍：摘要
太阳能作为一种新型的可再生资源受到越来越广泛的重视,光伏发电则是太阳能
利用中技术含量最高、最有发展前途的技术。现在,光伏发电系统已在世界范围内得
到越来越广泛的应用。为了在实验室条件下,进行太阳能光伏发电的研究,必须研究
出一种可以模拟光伏电池输出 I-V 特性的模拟器。
本文分析了太阳能光伏电池的输出 I-V 特性,讨论了光伏电池的数学模型,并在此
模型基础之上建立了简单易用的工程数学模型。本文还根据现有文献讨论了国内外光
伏电池模拟器的研究状况,并在这些研究成果的基础上提出了自己的设计方案。
本文从DSP控制电路、IGBT驱动和主电路拓扑结构三个层次详细介绍了系统硬件组
成;软件部分,本文提出了用分段二次曲线的方法拟合光伏电池输出特性曲线的算法,
并针对特定功率采用汇编语言编写了程序实现该算法。
通过系统仿真和实验证明了系统工作原理的正确性。实验结果证明本文中所设计的
光伏电池模拟器,能够较好的完成设计的目的,模拟器的输出特性符合所要模拟的光
伏电池的输出 I-V 特性,并且模拟器具有较好的动态响应性能,负载突变时,模拟器
能够自动跟踪工作点的变化并在当前工作点稳定工作。
因此,本系统能够在实验室条件下满足光伏发电系统的实验要求,为研究工作提供
一个较好的实验环境,节省研究经费和时间,加快研究进度。

关键词:光伏电池、特性曲线、模拟器、BUCK 电路、DSP
Abstract
Solar energy is paid more and more attention to as a new type of regenerated
energy sources. As the most important technology in the use of Solar energy,
PV power system is used all over the world. It’s necessary to imitate the
performance characteristic of solar cells if researching Solar energy in the
laboratory condition.
This paper analyzed the I-V characteristic of solar cells and its
mathematical model. Furthermore, this paper presents the engineering
analytical models of solar cells derived from the mathematical model. And this
paper presents my own solution of the PV simulator on the study of all the papers
about the simulator.
Hardware that contains DSP controller, IGBT driver and main circuit were
introduced in detail; . Quadratic polynomials are used to fit the real PV array’s
I-V characteristic curve, and it is programmed by assembly language to fulfill
the algorithm.
Through the simulation under Matlab and the experiments, the exactitude
of the system is illustrated. The experimental results show that the output
characteristics of the simulator are very close to those of actual solar cells,
and the simulator has a good dynamic response as well. It can search the working
Point automatically and stabilize the output according to the change of the
loads.
Therefore,to some extent,the sim