基于MSP430和组态王的数字式光伏阵列模拟器的研究

发布时间：2018-08-08 16:24

【摘要】：光伏能源发展迅速,已经成为世界上最主要的可再生能源之一。光伏阵列是光伏能源利用的主要形式,其主要输出特性受光伏阵列本身的参数和外界环境条件变化的影响,在工程实践或者科学研究中有时不方便直接使用光伏阵列进行测试。为此,本文设计了一款数字式光伏阵列模拟器,可模拟在不同光照和温度条件下,不同参数的光伏阵列的输出特性,用于工程试验或实验室研究。首先,本文简要介绍了世界能源的发展概况和光伏阵列模拟器的发展背景、发展现状及发展趋势,明确了研究价值和意义。分析了光伏电池的工作原理,详细介绍了光伏电池的分类。之后建立光伏电池的等效电路图,并推导出光伏电池的输出特性表达式,绘制出光伏阵列的理想I-V和P-V特性输出曲线。采用自动分段多项式拟合的算法对输出特性曲线进行拟合,改进了传统算法的不足。设计BUCK电路作为光伏阵列的主电路,对主电路拓扑中的电力电子元器件进行参数计算及选型。设计了主控制系统的外围电路,以及信号检测电路、驱动电路等周边电路。使用Kingview软件设计了人机交互界面,可方便更改光伏阵列以及外部环境条件的参数,能够实时显示输出电压、电流及功率状态,并且添加了实时曲线和历史曲线,方便对光伏阵列的工作状态进行研究分析。最后,使用MATLAB软件进一步验证了光伏阵列的数学模型,设计了SIMULINK仿真电路对硬件设计进行仿真,研制了原理性样机进行试验。仿真结果和试验结果符合设计预期,证明了设计的数字式光伏阵列模拟器能够很好的完成对光伏阵列的模拟。
[Abstract]:Photovoltaic energy has developed rapidly and has become one of the most important renewable energy sources in the world. Photovoltaic array is the main form of photovoltaic energy utilization. Its main output characteristics are affected by the parameters of photovoltaic array itself and the external environmental conditions. It is not convenient to directly use photovoltaic array in engineering practice or scientific research. In this paper, a digital photovoltaic array simulator is designed, which can simulate the output characteristics of photovoltaic array with different parameters under different light and temperature conditions, and can be used in engineering experiments or laboratory research. First of all, this paper briefly introduces the development of the world's energy sources and the background, current situation and development trend of photovoltaic array simulator, and clarifies the value and significance of the research. The working principle of photovoltaic cells is analyzed, and the classification of photovoltaic cells is introduced in detail. After that, the equivalent circuit diagram of photovoltaic cell is established, and the output characteristic expression of photovoltaic cell is deduced, and the ideal I-V and P-V characteristic output curves of photovoltaic array are drawn. The automatic piecewise polynomial fitting algorithm is used to fit the output characteristic curve, which improves the shortcomings of the traditional algorithm. BUCK circuit is designed as the main circuit of photovoltaic array. The parameters of power electronic components in the main circuit topology are calculated and selected. The peripheral circuit of the main control system, signal detection circuit, driving circuit and other peripheral circuits are designed. The human-computer interface is designed by using Kingview software, which can easily change the parameters of photovoltaic array and external environment conditions, can display output voltage, current and power state in real time, and add real-time curve and history curve. It is convenient to study and analyze the working state of photovoltaic array. Finally, the mathematical model of photovoltaic array is further verified by using MATLAB software. The simulation circuit of SIMULINK is designed to simulate the hardware design, and the principle prototype is developed to carry out the experiment. The simulation results and the experimental results are in line with the design expectation. It is proved that the digital photovoltaic array simulator can simulate the photovoltaic array well.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM615;TM914.4

【参考文献】