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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:
毕业设计说明书(毕业论文)
41
基于 DSP 的光伏并网逆变器硬件电路的设计
摘 要
由于近年来不可再生能源的不断消耗,能源危机日益凸显,各国都在加紧开发新能源。太阳能
发电作为一种全新的电能生产方式,具有清洁无污染、来源永不衰竭且维护措施简单等特点,因而
受到越来越广泛的关注。本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
率光伏并网发电系统,设计实现了基于 DSP 控制的单相光伏并网逆变器的硬件电路。
论文首先介绍了太阳能光伏并网的国内外发展现状,阐述了利用 DSP 控制光伏并网系统的基本
原理。然后提出了以逆变器 DC/AC 变换技术为核心的单相光伏并网逆变器的硬件电路设计方案,并
在 Matlab 软件上进行了仿真测试。最后对后续研究工作进行了展望,为进一步制作电路板及其调试
提供了参考。
关键词:光伏并网;逆变器;数字信号处理器;Matlab 仿真
毕业设计说明书(毕业论文)
41
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
毕业设计说明书(毕业论文)
41
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
毕业设计说明书(毕业论文)
41
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 主电路设计与关键参数选择......................................................................................28
3.4.1 Boost 电路设计与参数选择 ..............................................................................28
3.4.2 逆变器电路设计与参数选择............................................................................31
第四章 光伏并网逆变器仿真测试..........................................................................................35
4.1 Boost 升压电路仿真测试.............................................................................................35
4.1.1 Matlab 搭建电路图.............................................................................................35
4.1.2 仿真波形和分析................................................................................................35
4.2 逆变器电路仿真测试..................................................................................................36
4.2.1 Matlab 搭建电路图.............................................................................................37
4.2.2 仿真波形和分析................................................................................................37
第五章 总结和展望..................................................................................................................39
5.1 工作总结......................................................................................................................39
5.2 展望..............................................................................................................................39
参考文献....................................................................................................................................41
附录 ............................................................................................................................................42
附录 A DSP 控制电路 PCB 板 .......................................................................................42
附录 B 3D 模式的控制电路 PCB 板.................................................................................42
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