基于光伏发电的并网逆变器控制技术研究及建模仿真

摘要

面对全球日趋严重的能源危机问题，可再生能源的开发和利用得到了人们的高度重视。其中辐射到地球太阳能资源是十分富饶的，绿色清洁的太阳能不会危害我们的生存环境，因而受到了人们的广泛利用。光伏发电作为可再生能源被广泛的应用，技术不断革新。为了提高光伏发电系统的光电转换效率，需要系统实时的进行最大功率点跟踪。

现如今，全球都将遭受能源匮乏和大气污染严重得重大问题，在当前这种情况下，单相光伏并网逆变器控制系统成为世界各国关注的焦点和研发的重点方向。然而，单相光伏并网逆变器控制系统中的LCL型并网逆变器成为系统的重要角色，对电流的控制成为当前设计人员研究的重点方向。

关键词：LCL 型滤波器，并网逆变器，电流控制，抑制谐波

Abstract

In the face of the increasingly serious global energy crisis, the development and utilization of renewable energy has attracted great attention.Among them, radiation to the earth's solar energy resources is very rich, green and clean solar energy will not harm our living environment, so it has been widely used by people.Photovoltaic power generation as a renewable energy is widely used, technology innovation.In order to improve the photoelectric conversion efficiency of photovoltaic power generation system, the system needs to track the maximum power point in real time.

Nowadays, the whole world will suffer from the serious problems of energy shortage and air pollution. In this situation, the single-phase photovoltaic grid-connected inverter control system has become the focus of attention and the key direction of research and development all over the world.However, the LCL grid-connected inverter in the single-phase photovoltaic grid-connected inverter control system has become an important role of the system, and the current control has become the focus of current designers.

Keywords: Wind Photovoltaic power generation; Maximum power tracking; Inverter; DC/DC

目录

摘要............................................................................................................................. I

Abstract................................................................................................................... III

第一章 绪论............................................................................................................. 1

1.1研究课题背景............................................................................................. 1

1.2国内外关于光伏发电并网控制的发展状况.......................................... 5

1.3并网逆变器发展现状和发展趋势.................................................... 6

1.4课题研究意义............................................................................................. 7

1.5 研究内容及章节安排............................................................................... 8

第二章 光伏发电系统的组成................................................................................ 8

2.1光伏发电系统的基本组成........................................................................ 8

2.2光伏发电系统的分类................................................................................ 9

2.3光伏发电系统的应用.............................................................................. 10

2.4小结........................................................................................................... 11

第三章 光伏并网逆变系统及其控制技术......................................................... 11

3.1光伏并网逆变系统.................................................................................. 12

3.2      并网逆变系统滤波器....................................................................... 12

3.2.1       LCL 型滤波器模型.............................................................. 13

3.2.2       无源阻尼................................................................................ 15

3.2.3       有源阻尼................................................................................ 17

3.2.4       混合阻尼................................................................................ 19

3.3      单相并网逆变器系统模型分析................................................ 20

3.3.1       单相并网逆变器系统概述............................................ 20

3.4      LCL 型滤波器控制策略.................................................................. 22

3.4.1       网侧电流反馈模型............................................................... 23

3.5      本章小结............................................................................................ 24

第四章 光伏发电单相并网逆变器的仿真........................................................ 24

4.1 光伏发电单相并网逆变器的仿真模型搭建....................................... 24

4.2仿真结果分析.......................................................................................... 26

4.3小结........................................................................................................... 29

第五章 总结........................................................................................................... 29

参考文献................................................................................................................. 30

致    谢................................................................................................................. 31

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