摘要并网逆变器是新能源发电的主要组成部分。本文以光伏逆变器为研究对象，对光伏并网逆变器的硬件选取，以及用DSP来控制光伏逆变器的输出进行了详细的说明。

本文先对光伏发电对于逆变器的整体要求进行分析，包括光伏逆变器的工作原理以及对于光伏逆变器的整体设计进行说明。71696

其次是对光伏发电的硬件选取进行分析。本次设计使用的是IPM器件，IPM是用IGBT作功率开关，内部集成了有栅极驱动电路、故障检测电路和多种保护电路，其中保护电路包括过流、短路、欠电压等保护。由于IPM的聚合度高、体积小，所以明显提高了可靠性。

接着次重点研究了用DSP作为控制系统的DSP芯片以及电路的选取。

最后对光伏并网逆变系统进行相应的仿真与实验研究。

毕业论文关键词：   光伏逆变器  IPM器件  DSP芯片

The design of 250 kw photovoltaic inverter

Abstract Grid inverter is the main part of new energy power generation. As the research object, based on the photovoltaic inverter for photovoltaic (pv) grid inverter hardware selection, and conduct the thorough research to the problem of double closed loop control. 

This article first to the overall requirement of the photovoltaic power generation for inverter is analyzed, including the working principle of photovoltaic inverter and instructions for the integral design of the photovoltaic inverter. 

The second is the analysis of photovoltaic hardware selection. This design USES the IPM device, IPM is using IGBT as the power switch, the internal integration has a gate drive circuit, fault detection circuit and a variety of protective circuit, protect circuit including over-current, short circuit, under voltage protection, etc. As a result of the IPM high integration, small size, so the reliability has improved significantly. 

Then time focuses on using DSP as the control system of the DSP chip as well as the selection of circuit. 

Finally, the photovoltaic (pv) grid inverter system to the corresponding simulation and experimental research. 

Key word： photovoltaic inverter    IPM device    DSP chip

目  录

摘要-Ⅰ

Abstract--Ⅱ

目录-Ⅲ

1 绪论 1

1.1  课题研究背景及意义 1

1.2  光伏产业国内外发展现状 2

1.3  本论文的主要工作 4

2 光伏逆变器的工作原理及总体设计 4

2.1  光伏逆变器工作原理 4

2.2  光伏逆变器的总体介绍 5

3 逆变器的参数设计 7

3.1 光伏逆变器参数的选择 8

3.2 逆变器输出滤波器设计 10

3.3 空间矢量PWM控制 12

3.4 并网逆变控制系统 15

4 控制系统的软硬件设计 12

4.1 空间矢量PWM控制 12

4.2 并网逆变控制系统 14

4.3 DSP控制部分 18

4.4 智能功率模块驱动辅助电路 20

4.5 缓冲电路                      21

4.6 信号检测及调整电路                                         23