文档介绍：河北工业大学城市学院
毕业设计说明书
作者: 学号:
系: 电气与自动化
专业: 电气工程及其自动化
题目: 光伏并网逆变器的研究
指导者:
(姓名) (专业技术职务)
评阅者:
(姓名) (专业技术职务)
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毕业设计(论文)中文摘要
题目光伏并网逆变器的研究
摘要:
太阳能作为一种高效无污染且可持续发展的新能源,受到了世界各国的广泛重视。光伏发电是太阳能利用的一个重要方面,而并网发电则是太阳能发电规模化的必然方向。光伏并网逆变器是光伏并网发电系统(GCPS, grid-connected PV generation system)的核心部件。
目前光伏发电系统中的逆变器大多采用工作在SPWM状态的全桥式逆变方案。如何提高逆变器的性能,提高开关频率,提高逆变器的功率密度,同时满足电能质量要求成为近年研究的热点。
本文介绍了研究光伏并网逆变器的目的和意义,阐述了国内外光伏并网逆变器的现状与发展趋势,光伏并网逆变器的基本原理,以及分析比较了几种常见的逆变器拓扑结构,并且说明了光伏并网逆变器的控制方式。控制器的硬件结构主要由单片机或数字信号处理芯片作为核心器件构成;通过直流-直流升压斩波变换器,可以在变换器和逆变器之间建立直流环、升压斩波器根据电网电压的大小用来提升光伏阵列的电压以达到一个合适的水平,同时直流-直流变换器也作为最大功率点跟踪,增大光伏系统的经济性能,逆变器用来向交流系统提供功率;继电保护系统可以保护光伏系统和电力网络的安全,并且本文给出了软件方面的流程图。结果表明本装置的软硬件设计合理,系统运行可靠,达到了预期的效果。
关键词:太阳能,光伏并网技术,逆变器
毕业设计(论文)外文摘要
Title Photovoltaic(pv)grid inverter research
Abstract
Solar energy as the one kind of high pollution and sustainable development of the new energy, has received the worldwide attention. Photovoltaic power generation solar energy is one of the important aspects, and grid generation is solar power scale of inevitable direction. Photovoltaic (PV) grid inverter is photovoltaic (PV) grid power system (GCPS, grid-connected PV generation system) ponents.
At present (pv) power system of inverter is used mostly work in the state of the whole bridge type SPWM inverter scheme. How to improve the performance of the inverter, improve switch frequency, improve the inverter power density, at the same time satisfy the power quality requirement to e in recent years, the research focus.
This paper introduces the research photovoltaic (pv) grid inverter of purpose and meaning, at home and abroad were elaborated photovoltaic (pv) grid inverter the present situation and the development tendency, photovoltaic (pv) grid inverter, the basic principles of analysis parison of mon inverter topology structure, and shows that the photovoltaic (pv) grid inverter control method. Controller hardware structure of the main by single-chip puter or digital signal proce