摘  要：太阳能光伏发电是一种将太阳光辐射能量直接转化为电能的发电技术，它是可再生能源和新能源的重要组成部分，被认为是当今世界上最有发展前景的新能源技术。

本文系统地介绍了独立光伏系统的结构、工作原理、控制方法等方面的内容，为降低系统体积及提高系统效率，提出“推挽升压+全桥逆变”的设计方案。推挽升压的控制器采用电压型控制芯片SG3525,采用电压反馈，增加了系统的动态响应速度，同时详细讨论了高频变压器的设计、滤波元件参数的选择等。逆变环节采用PWM调制方式，控制芯片为PIC16F73，简化了驱动电路设计。软件设计中，采用瞬时电压反馈，增加了电路保护等功能，论文阐述了软件设计总体思想构架，给出了程序代码。66441

最后,利用单片机仿真软件proteus对系统进行仿真并给出仿真原理图及仿真波形。

毕业论文关键词：光伏发电, 推挽升压, 单相全桥逆变, PIC16F73  

Abstract: Solar photovoltaic power generation is a kind of technology which can convert solar radiation energy into electricity directly,solar energy is renewable energy and an important part of new energy, which is considered to be the world's most development prospects of new energy technology.

This paper introduces the independent photovoltaic system structure, working principle and control methods detailedly. In order to reduce system volume and improve the efficiency of the system, the paper puts forward to an inverter by using "the push-pull converter and single-phase full-bridge inverter" design proposal. In the push-pull controller part,the paper uses the voltage type control chip SG3525,choosing voltage feedback to increase the system dynamic speed of response,at the same time,the paper also discusses the high-frequency transformer design,the filter components parameters choices in detail; in the inverter part ,the paper use PWM inverter link, and the control chip is PIC16F73,this makes the system simple. In the software design,the paper uses the transient voltage feedback and meanwhile,increase circuit protection function, the paper also elaborates the overall framework of software design and displays program code. 

Finally, the paper uses single chip computer simulation software the proteus simulink the system and gives the simulation principle diagram and waveform. 

Key words: photovoltalc power system，Push-Pull Converter，single-phase full-bridge inverter，PIC16F73

目  录

1 绪论 4

1.1 太阳能光伏发电技术 4

1.2 太阳能光伏发电系统 5

1.3 本文的研究内容 7

2 户用型光伏发电系统的研究与设计 8

2.1 户用型光伏发电系统的组成 8

2.2 户用型光伏发电系统对逆变电源设计的要求 10

2.3 主电路拓扑结构的设计 10

3 光伏发电电池容量及光伏阵列的设计 15

3.1 户用型光伏发电蓄电池组的设计 15

3.2 户用型光伏阵列的设计 18

4 户用型光伏发电系统逆变电源的设计 20

4.1 推挽式DC／DC变换器原理介绍 20

4.2 推挽式电路变压器的偏磁现象 21

4.3 推挽式升压电路设计