光伏并网发电设计 612.docVIP

2 -摘 要光伏发电是一种直接将太阳能辐射转换成为电能的新型发电技术。其系统包括光伏电池、变换器、蓄电池、控制器四大部分。本文从实验的角度，对光伏并网发电系统进行模拟。基本思路是在单片机C8051F020控制作用下采用正弦波脉宽调制技术（SPWM）对系统进行控制，主电路采用MOSFET为主要元器件的单相桥式逆变电路，经滤波电路滤波后变压进行输出。基于此，本设计采用单片机本身的PGA模块，定时器模块，完成相应的控制功能，使光伏发电频率紧跟模拟电网频率，绝对误差小于1%，同时实现光伏最大功率跟踪，在负载变化范围内DC-AC变换效率可达70%以上，该系统性能相对稳定，能够满足本次设计的需要。关键词：C8051F020 SPWM 最大功率点跟踪 光伏并网发电AbstractPhotovoltaic power generation is a direct solar radiation is transformed into electricity will be the new power generation technology. The system includes pv batteries, converter, batteries, controller four most. This paper, from the point of view of experiment of photovoltaic (pv) grid power system simulation. The basic idea is C8051F020 SCM control action in the sinep ulse-width modulation technology (SPWM) the system is controlled, main circuit adopts MOSFET as the main components of single-phase bridge type inverter circuits, the filter circuit for output variable pressure filtered. Based on this, this design USES the microcontroller itself, timer modules of PCA module, completing the corresponding control function, make photovoltaic power frequency follows simulation grid frequency, the absolute error less than 1%, but also achieve the most power tracing, in photovoltaic load changes range DC - AC conversion efficiency may reach 70% above, this system performance relative stability, can satisfy the need of this designKeywords: C8051F020 SPWM The maximum power point tracking Photovoltaic (pv) grid generation 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc295458873 第一章 光伏并网系统国内外发展现状 PAGEREF _Toc295458873 \h - 1 - HYPERLINK \l _Toc295458874 §1-1 国外光伏并网系统的发展和趋势 PAGEREF _Toc295458874 \h - 1 - HYPERLINK \l _Toc295458875 §1-2 我国光伏并网发电的发展 PAGEREF _Toc295458875 \h - 1 - HYPERLINK \l _Toc295458876 第二章 与电网并网的光伏发电系统 PAGEREF _Toc295458876 \h - 2 - HYPERLINK \l _Toc295458877 第三章 光伏并网发电模拟装置系统总体设计方案 PAGEREF _Toc295458877 \h - 4 - HYPERLINK \l _Toc295458878 §3-1 系统基本工作原理 PAGEREF _Toc295458878 \h - 4 - HYPERLINK \l _Toc295458879 §