基于MATLAB光伏电池最大功率点跟踪算法的研究_毕业设计（论文）（可编辑）.docVIP

基于MATLAB光伏电池最大功率点跟踪算法的研究_毕业设计（论文） ABSTRACT With the green and renewable energy be widely used, solar energy is accepted commonly because of its unusual advantages. But the output of photovoltaicPV array is influenced by the environmental factors, and PV array have relatively low conversion efficiency and is expensive. In order to reduce the overall system cost and extract the imum possible solar energy, we should control the PV system effectively. This paper focuses on MPPT control techniques of PV array, analyses the theory particularly, establishes simulation model with MATLAB software, presents control strategies relevantly, and validated by experimental results. Firstly, this paper analyses the composing of the PV system. It is composed by PV array、power electronics converters、power storage system and loads. We can divide the PV system into two types: stand-alone PV system and grid-connected PV system by the relationship with the grid. Secondly, this paper analyses the electrical characteristics of PV cell and establishes simulation model, and also analyses commonly used MPPT methods, such as Incremental Conductance method、PO method. And then presents three improved methods: Open Circuit method、Optimal Gradient method、Three-Point Weight Comparison method. These methods each has his strong point and can be used in different field. Keywords:Photo voltaic cell,MPPT,PQ , Incremental Conductance method, Fuzzy controller,MATLAB/SIMULINK 目 录 摘要(中文)………………………………………………………I (英文)……………………………………………………..II 第一章 概述 1 1.1 研究背景 1 1.2 研究现状 1 1.2.1 光伏电源系统 1 1.2.2 最大功率点跟踪 1 1.2.3 电力电子仿真工具 1 1.3 研究内容 2 1.4 研究意义 2 1.5 实现方法及预期目标 3 第二章 光伏电池特性的研究 3 2.1光伏电池的分类 3 2.2 光伏电池的工作原理 4 2.2.1 P-N结简介 4 2.2.2 光伏电池的工作原理 5 2.3 光伏电池的电气特性 5 2.3.1 光伏电池输出特性方程 5 2.3.2 光伏电池模组与阵列 7 2.4光伏电池的仿真实现 8 2.4.1仿真原理与模型 8 2.4.2 光伏电池的特性分析 10 2.5 小结 13 第三章 最大功率点跟踪算法的研究 13 3.1 光伏系统的最大功率点跟踪 13 3.2 常用的最大功率点跟踪算法 15 3.2.1 爬山法PO) 15 3.2.2 爬山法仿真结果及其分析 18 3.2.3导纳增量(Incremental Conduc