基于DSP光伏并网逆变器的硬件电路设计毕业设计.doc

本科生毕业设计说明书（毕业论文） 题 目：基于DSP的光伏并网逆变器硬件电路的设计 学生姓名： 学 号： 专 业：电气工程及其自动化 班 级： 指导教师： 基于DSP的光伏并网逆变器硬件电路的设计 摘 要 太阳能，具有清洁无污染、来源永不衰竭且维护措施简单等特点，受到越来越广泛的关注。文针对太阳能应用的一个重要研究领域光伏发电系统，尤其是小功率光伏发电系统， 关键词：；PV Grid-Connected Inverter Hardware Circuit Design Based on DSP Abstract In recent years, with the continuous consumption of non-renewable energy, the energy crisis has become increasingly prominent, countries are stepping up the pace to develop new energy. Solar power, as a new energy production methods, owns many features, such as, clean, non-polluting, never failure of source and simple maintenance measures, and thus draws more and more attention. In this paper, as for an important research field of solar energy applications-photovoltaic systems, especially low-power photovoltaic power generation system, the hardware circuit of the DSP-based control of single phase photovoltaic grid-connected inverter is designed and implemented. The paper firstly described the development of solar photovoltaic grid in the world, and explained the basic principles of DSP controlled photovoltaic grid system. Then objective of the single-phase PV grid inverter with the core of DC / AC conversion technology inverter hardware circuit is designed and its simulation tests on the Matlab software is proceeded. Finally, the prospect of follow-up study provides a reference for the further production of circuit boards and their debugging. Key words: grid-connected photovoltaic; inverter; DSP; Matlab simulation 目 录 摘 要 I Abstract II 第一章 绪 论 1 1.1 课题研究的背景、目的和意义 1 1.2 国内外研究的现状 1 1.2.1 国内研究的现状 2 1.2.2 国外研究的现状 2 1.3 本课题研究的主要内容 3 第二章 太阳能光伏并网的研究 4 2.1 光伏并网逆变器的拓扑结构设计 4 2.1.1 按变压器拓扑结构分类 4 2.1.2 按功率变换级数分类 6 2.1.3 按控制方式分类 7 2.2 光伏并网控制策略基本原理 10 2.2.1 光伏并网逆变器的控制方式 10 2.2.2 光伏并网逆变器的控制目标 10 2.2.3 输出电流控制方式 11 2.2.4 最大功率点跟踪 12 2.3 孤岛效应 14 2.3.1 孤岛效应的影响和危害 14 2.3.2 孤岛效应的检测方法 15 第三章 基于DSP的并网逆变器硬件电路的设计 16 3.1 并网逆变器总体结构 16 3.2 基于DSP的控制系统硬件设计 16 3.2.1 DSP概述 17 3.2.2 DSP系统硬件电路设计 18 3.3 采样和调理保护电路设计 24 3.4