光伏发电系统中的储能环节设计
时间:2018-03-05 20:14 来源:毕业论文 作者:毕业论文 点击:次
| 摘要目前，利用太阳能的最常见方法就是光伏发电。独立光伏发电系统中主要由光伏电池、前级变换器、储能环节和负载组成。对于光伏系统中的光伏电池和前级变换器环节，进行理论分析和建模仿真。根据光伏电池模型，对光伏电池的光照特性和温度特性进行分析；根据 Boost 升压电路原理，对前级变换器进行建模分析，对含反馈的前级变换器进行建模仿真。 主要研究独立光伏发电系统中的储能环节。储能环节主要包括了三个部分，蓄电池部分、充放电电路部分和能量优化控制器部分。对于储能部分，选用 VRLA（阀控式密封铅酸）蓄电池，对其等效电路进行充放电分析；对于充放电电路部分，选用双向 Buck/Boost 的 DC/DC 电路，分别对充电模式和放电模式进行Matlab 建模仿真验证；能量优化控制器部分对工况进行理论分析，列出不同工况下控制器的控制策略。通过仿真结果表明，储能环节的充放电电路能够有效工作。19287 关键字 储能环节 充放电 Boost 电路 光伏发电 Title The Energy Storage Design of Photovoltaic Power Generating System Abstract Photovoltaic has become a common method of using solar energy. Independent photovoltaic system mainly includes photovoltaic cells, pre-converters, energy storage and load. For some units of Independent photovoltaic system, such as photovoltaic cells and pre-converter, the theory parts be analyzed and simulation model is built. According to the model of photovoltaic cells, photovoltaic cells characteristic of light and temperature characteristics are analyzed; According Boost circuit principle, the pre-converter model is built to analyze. The pre-converter model with feedback is built and simulated. The main topic of this research is the energy storage unit of the Independent photovoltaic system. Storage unit includes three parts, such as storage battery part, part of charging and discharging circuit and energy controls part. For energy storage, VRLA (VRLA) batteries is used, and it is analyzed about the charge and discharge characteristics of its equivalent circuit; For charging and discharging circuit part, the bi-Buck / Boost of DC / DC circuits are selected, respectively, Matlab simulation models are built to imitate the charging circuit and discharge loop; For controller part, the theoretical conditions listed under different conditions are analyzed. Under different conditions, the controller can control the charging and discharging circuit. The simulation results show that the charging and discharging circuit of energy storage aspects can work effectively. Keywords energy storage charge and discharge Boost circuit photovoltaic 目次 1 绪论 . 1 1.1 光伏发电系统的种类与组成 1 1.2 光伏发电系统中的储能环节 .. 4 1.3 本文主要研究的内容和任务 6 2 光伏电池的建模与仿真 .. 8 2.1 光伏电池的原理 .. 8 2.2 光伏电池的MATLAB 建模和仿真 10 3 前级BOOST 电路的原理和仿真 .. 18 3.1 前级BOOST 升压变换电路原理 .. 18 3.2 调制方法与控制策略 . 19 3.3 对于BOOST 电路 MATLAB仿真 21 3.4 含反馈的BOOST 电路 23 4 双向BUCK/BOOST 充放电控制电路 .. 28 (责任编辑：qin) |