文档介绍：毕业论文学生姓名学号学院物理与电子电气工程学院专业电气工程及其自动化题目离网型光伏供电系统研究指导老师(姓名) (专业技术职称/ 学位) (姓名) (专业技术职称/ 学位) 201 2年5月 1 1 摘要: 本文介绍了太阳能光伏发电的系统的基本组成和特性,说明了太阳能电池最大功率跟踪的原理以及一些常用的方法,并比较了他们的优缺点。本文研究一种带有双向变换器功能的离网光伏发电系统,通过对目前太阳能离网光伏发电系统常用 DC/DC 拓扑结构的研究,总结了各种 DC/DC 拓扑结构的优缺点。添加了逆变电路使系统能够向交流负载供电,并对逆变电路通过 MALTAB 进行了仿真。关键词: 离网光伏发电,逆变电路, DC/DC 变换器,最大跟踪率 2 2 Abstract: This article describes the ponents and characteristics of the solar photovoltaic system, illustrates the principle of the solar cell maximum power point tracking as well as monly used method, pare their advantages and disadvantages. This article focuses on research with a bi-directional converter function off-grid photovoltaic systems, solar stand-alone PV power generation monly used in the DC / DC topology, summarizes the advantages and disadvantages ofa variety of DC / DC topology. Added to the inverter circuit makes the system load to the AC power supply, and inverter circuit by MALTAB the the simulation. Keywords: off-grid photovoltaic inverter circuit, the DC / DC converter, the maximum tracking rate 3 3 目录 1 绪论........................................................................................................... 4 太阳能光伏发电的背景...................................................................... 4 太阳能光伏发电研究现状与发展趋势.............................................. 5 2 光伏发电系统介绍.................................................................................. 6 离网光伏发电系统.............................................................................. 8 铅酸蓄电池...................................................................................... 9 太阳能电池最大功率点跟踪........................................................ 11 并网光伏发电系统............................................................................ 12 3 太阳能离网光伏发电系统分析............................................................ 13 离网光伏供电系统的主电路图....................................................... 13 电路工作原理..................................................