摘要本文介绍了光伏发电系统的历史背景和研究意义，以及国内外光伏发电系统的研究现状和趋势。光伏发电系统有多种种类，如离网光伏发电系统，并网光伏发电系统，离并网光伏发电系统。本文主要研究离并网光伏发电系统中的分布式光伏发电系统这一模块，总结分布式光伏发电系统具有什么优势，探讨分布式光伏发电系统具体存在什么问题以及怎么去解决这些问题，最后明确给出解决这些问题的方法。通过课题小组设计的5KW分布式离并网光伏发电系统，反思总结出在工程实施过程中所出现的问题，以及怎么解决问题，得出什么结论，对分布式光伏发电系统的发展有何帮助。在此过程增加了哪些实践经验。44182

毕业论文关键词： 分布式电源；光伏发电：并网：电网

Abstract

This article shows the historical backgraoud and the significance of the research of the Photovoltaic(PV) system. In addition, this paper also introduces the research situation and the development of the trend of the Photovoltaic(PV) system at home and abroad. There are many sorts of photovoltaic power generation systems, such as the Isolated Photovoltaic Systems, the Grid-connected Photovoltaic Systems and the Isolated and Grid-connected Photovoltaic Systems. This paper mainly studies the module of Distributed Photovoltaic Systems in the Grid-connected Photovoltaic  Systems,  summarizes the main advantages of the Distributed Photovoltaic Systems, and discuss what the Distributed Photovoltaic Systems’  specific problems are and how to solve them. Finally it gives the methods to solve these problems. We design the Distributed Grid -connected Photovoltaic Systems through the team work. Besides, we also summurize the project implementation process problems which may appear and the conclusions we can draw in the research. What benefits we can acquire from the development of Distributed Photovoltaic System and what experience we can get in the procedure.

Keywords: distributed generation; photovoltaic power generation; grid-connected; grid

目 录

第一章 研究背景及意义

1.1历史背景4

1.2研究意义4

1.3我国能源储量与分布5

第二章 太阳能光伏发电系统的发展

2.1  国外太阳能光伏发电系统的发展情况5

2.2  国内太阳能光伏发电系统的发展情况6

第三章 光伏发电系统的分类

3.1 离网光伏发电系统6

3.1.1 个体户发电系统6

3.1.2 离网电站系统6

3.2 并网光伏发电系统7

3.2.1 光伏建筑一体化7

3.2.2 大型并网光伏电站8

3.3 离并网光伏发电系统8

3.3.1 自发自用，余电上网8

第四章 分布式光伏发电系统

4.1 分布式光伏发电系统的简介8

4.2 分布式光伏发电系统的优势8

4.2.1输出功率相对较小8

4.2.2污染小，环保效益突出9

4.2.3缓解局部地区用电紧张9

4.2.4发电、用电并存9

4.3 分布式光伏发电系统存在的问题

4.3.1对电网规划产生影响9

4.3.2并网方式的不统一9

4.3.3对电能质量产生影响9

4.3.4对继电保护的影响9