独立光伏发电系统的MPPT控制及能量管理的研究

发布时间：2018-09-19 18:30

【摘要】：如今,随着化石能源紧缺和环境污染等问题愈来愈严重,太阳能以其独特的优势,得到飞快的发展与运用,而光伏发电则是太阳能的主要应用方向。如何能够最大效率的获得太阳能一直是光伏发电主要研究问题,并且蓄电池作为独立光伏发电系统的储能设备,其循环使用寿命也严重影响系统的稳定性,所以针对蓄电池能量的管理也极其重要。基于此,本文对独立光伏发电系统中最大功率点追踪技术及蓄电池能量管理等方面进行研究,主要研究内容如下所示:第一,查阅国内外与光伏发电有关的文献资料,了解光伏发电的背景,分析国内外对于最大功率点跟踪技术及蓄电池能量管理的研究现状,对光伏发电系统的主要种类进行阐述。第二,对太阳能电池的发电原理进行阐述,并详细分析了太阳能电池的数学模型,包括理论数学模型及工程数学模型,根据太阳能电池的工程模型在MATLAB/Simulink进行仿真建模,仔细研究在不同的环境下太阳能电池的输出特性。第三,对蓄电池的工作原理、主要特性参数及影响其寿命的因素进行分析研究,分析几种关于蓄电池剩余容量预测的方法,并介绍了本文所采用的蓄电池剩余容量预测方法,并详细阐述如何根据蓄电池剩余容量对蓄电池进行充放电控制。第四,分析最大功率点跟踪技术的原理,对比研究常用的几种最大功率点跟踪技术的优缺点,详细介绍了本文采用的基于卡尔曼滤波的自适应扰动观察法,并对该控制策略进行仿真建模分析。第五,本文基于DSP28027芯片搭建了独立光伏发电系统实验平台,基于该实验平台对蓄电池剩余容量预测策略及最大功率点跟踪控制策略进行实验分析与验证,实验结果表明控制策略的有效性。
[Abstract]:Nowadays, with the increasingly serious problems of fossil energy shortage and environmental pollution, solar energy, with its unique advantages, has been rapidly developed and applied, and photovoltaic power generation is the main application direction of solar energy. How to obtain solar energy efficiently has been the main research problem of photovoltaic power generation, and the cycle life of battery, as the energy storage equipment of independent photovoltaic power generation system, has a serious impact on the stability of the system. So the management of battery energy is also extremely important. Based on this, this paper studies the maximum power point tracing technology and battery energy management in independent photovoltaic power generation system. The main research contents are as follows: first, consult the domestic and foreign literature related to photovoltaic power generation. Understanding the background of photovoltaic power generation, analyzing the research status of maximum power point tracking technology and battery energy management at home and abroad, and expounding the main types of photovoltaic power generation system. Secondly, the principle of solar cell generation is expounded, and the mathematical model of solar cell is analyzed in detail, including theoretical mathematical model and engineering mathematical model. According to the engineering model of solar cell, the simulation model is carried out in MATLAB/Simulink. Study the output characteristics of solar cells in different environments. Thirdly, the working principle, the main characteristic parameters and the factors influencing the life of the battery are analyzed, and several methods for predicting the residual capacity of the battery are analyzed, and the prediction method of the residual capacity of the battery is introduced in this paper. How to control the charge and discharge of the battery according to the residual capacity of the battery is described in detail. Fourthly, the principle of maximum power point tracking technology is analyzed, and the advantages and disadvantages of several commonly used maximum power point tracking techniques are compared. The adaptive disturbance observation method based on Kalman filter is introduced in detail in this paper. The control strategy is simulated and analyzed. Fifthly, based on DSP28027 chip, an experimental platform for independent photovoltaic power generation system is built. Based on the platform, the residual capacity prediction strategy and the maximum power point tracking control strategy are analyzed and verified. Experimental results show the effectiveness of the control strategy.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM615

【相似文献】