基于lpc的光伏电网测试系统设计.docVIP

目 录 中文摘要 1 英文摘要 2 1 引言 3 1.1 太阳能光伏产业发展前景 3 1.2 光伏阵列测试技术研究现状和意义 4 1.3 本论文主要内容和框架 5 2 光伏阵列的特性及其测试方法 6 2.1 太阳电池原理以及分类 6 2.2 太阳能电池的特性 7 2.3 光伏伏阵列特性测试方法 11 3 基于LPC2214的硬件选择和实现 16 3.1 光伏阵列特性测试系统整体设计 16 3.2 系统电路设计 17 3.3 采样电路设计 20 3.4 控制及数据处理模块的设计 22 结论 33 谢辞 34 参考文献 35 光伏阵列特性测试系统设计 摘要：光伏阵列是光伏系统的重要组成部分，它决定了光伏系统的发电量，同 时也是光伏系统成本的主要部分。因此合理配置光伏阵列，分析和评价光伏电站的发电效率，提高光伏阵列的利用效率一直是光伏系统设计的研究重点，也是降低光伏系统发电成本的重要措施。本文采用了电容动态充放电法，该方法是通过检测太阳能电池阵列对电容的充电过程中电流、电压的数据变化，重现光伏阵列的I-V特性，采用这种方式可以快速而方便的测量太阳能电池阵列的I-V特性，具有体积小、重量轻等特点。设计是基于飞利浦公司的LPC2214设计的。通过对该系统进行评估可以得出结论：该测试系统运行稳定，测量精度较高，一次完整的测试只需54ms左右，测试速度快，并且测量得到的伏安特性可以在液晶上直接以曲线的形式显示，使测得的阵列特性更为直观，能满足工程应用的需要。 关键字：光伏阵列；光伏特性；数学模型；IV曲线 Design on the Testing System of PV Array Characteristic Abstract:A photovoltaic array is an important component of the photovoltaic system.It determines the cost of photovoltaic system and rational power capacity of the system.Therefore,the rational allocation of the photovoltaic array,Analysis and evaluation the power generation efficiency of photovoltaic power plants.Enhancing the efficiency in the use of photovoltaic arrays has been the focus of the PV system design, is also an important measure to reduce power generation costs of PV systems.In this paper,the dynamic capacitance charge and discharge method, the method by detecting the solar array to the process of charging the capacitor current and voltage data changes,to reproduce the IV characteristics of PV array,in this way can quickly and easily measuring solarIV characteristics of the battery array, with a small size, light weight and other characteristics.The assessment results of the system show that the testing system operates stabely,has the higher measurement accuracy.A complete testing will take about 54 ms,and the measured characteristics of photovoltaic arrays can displayed on LCD directly in the form of a curve that made the characteristics of photovoltaic arrays more illustratable and comprehensible.It can meet the needs