附录A硬件电路总图.doc

摘 要 在绿色再生能源得到广泛应用的今天，太阳能因为其独特的优势而得到青睐。太阳能光伏发电受到世界各国的普遍关注，光伏并网发电也将成为太阳能利用的主要趋势，必将得到快速的发展。但因为光伏电池的转化效率较低且输出特性受外界环境因素影响大，使光伏电池实时输出最大功率成为关键。因此光伏最大功率跟踪也成为光伏发电系统的关键技术之一。 本文主要对光伏最大功率跟踪控制技术（升压斩波电路）进行研究。首先，对光伏电池的电气进行测量，得到了光伏电池的输出特性；采用基于Boost的实现方案，分析光伏最大功率跟踪的工作原理单片机实现扰动观察法的C语言编程。 ABSTRACT Today the green renewable energy is widely used , solar is favored because of its unique advantages. Solar photovoltaic power is widely concerned around the world, photovoltaic solar power generation will also become the main trend of development and also be rapid. But because of low conversion efficiency of photovoltaic cells and the output characteristics are affected by the environmental factors, making the largest power of photovoltaic cells real-time output the key. Therefore, the maximum power tracking of solar photovoltaic power generation system has also become one of the key technologies. In this paper, I will mainly research the maximum power tracking technology of the PV, design and improve the Boost circuit (Boost cut broken circuit). First, I measuring the electrical characteristics of photovoltaic cells , and get the output characteristics of photovoltaic cells; then based on Boost circuit of implementations, analysis the works of Photovoltaic maximum power tracking. Then, based an the DSP microcontroller TMS320F2812 , I use the method of perturbation and observation ,to do the programming based on C language. At last, I assembled the sample machine and did experiments, those experiments showed that the paper can accomplish the design and optimization of Boost circuit. And the experiments also showed that the design can complete the maximum power point tracking. Key words：PV；MPPT；DSP；Boost circuit；perturbation and observation 目 录 摘 要 I ABSTRACT 1 前言 11 1.1 选题背景 111.1.1 能源现状 11 1.1.2 太阳能光伏发电 11 1.2 本课题的研究意义和任务 13 2单相光伏并网发电系统基本原理 2.1 单相光伏并网发电系统结构组成 14 2.2 主要部分工作原理 14 2.2.1 DC-DC变换器 15 2.2.2 DC-AC逆变器 15 3 光伏电池的特性测量 17 3.1 光伏电池的等效电路模型 17 4 硬件电路设计 17 4.1 Boost电路工作原理