基于ARM的光伏阵列最大功率跟踪系统的研究

发布时间：2019-01-23 12:37

【摘要】：能源是社会存在与进步的物质基础。太阳能作为一种取之不尽用之不竭的清洁能源,受到越来越多的重视。太阳能是当今能源的一个重要补充,长远来看它具备成为未来主能的潜力。本文以光伏发电技术中的核心问题最大功率跟踪(MPPT)作为研究对象,利用仿真和实验进行了系统深入地研究。最大功率跟踪系统研究中的基本问题是光伏阵列的输出特性。详细研究光伏阵列输出特性,并运用Matlab/Simulink建立光伏阵列的仿真模型是整个最大功率跟踪系统研究的基础。另外,本文采用Boost变换电路匹配光伏阵列内阻的方法来实现光伏阵列的最大功率点跟踪,并建立了系统的仿真模型。 MPPT算法是这个控制系统的灵魂.本文运用Matlab/Simulink对常见的几种MPPT控制算法进行仿真,并对仿真结果进行分析与比较,提出了一种改进的控制算法即逐级逼近法。仿真结果的分析表明此算法具有良好的动态响应速度和稳定性,并具有快速适应环境变化的能力。本文提出的最大功率跟踪系统的总体结构和控制方案,采用以微控制器LPC2210为核心搭建最大功率跟踪系统的硬件平台,通过实验来验证逐级逼近法的有效性。
[Abstract]:Energy is the material foundation of social existence and progress. As an inexhaustible clean energy, solar energy has been paid more and more attention. Solar energy is an important supplement to today's energy. In the long run, it has the potential to become the main energy in the future. In this paper, the core problem of photovoltaic power generation, maximum power tracking (MPPT), is studied systematically and deeply by simulation and experiment. The basic problem in the research of maximum power tracking system is the output characteristic of photovoltaic array. The output characteristics of photovoltaic array are studied in detail, and the simulation model of photovoltaic array is established by using Matlab/Simulink, which is the basis of the research of the whole maximum power tracking system. In addition, the Boost transform circuit is used to match the internal resistance of the photovoltaic array to realize the maximum power point tracking of the photovoltaic array, and the simulation model of the system is established. MPPT algorithm is the soul of this control system. In this paper, Matlab/Simulink is used to simulate several common MPPT control algorithms, and the simulation results are analyzed and compared. An improved control algorithm, the stepwise approximation method, is proposed. The analysis of simulation results shows that the algorithm has good dynamic response speed and stability, and has the ability to adapt to environmental changes quickly. In this paper, the overall structure and control scheme of the maximum power tracking system are presented. The hardware platform of the maximum power tracking system is built with the microcontroller LPC2210 as the core, and the effectiveness of the stepwise approximation method is verified by experiments.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TM615;TP368.12

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