光伏组件热斑效应检测及仿真分析

发布时间：2018-05-01 19:15

本文选题：热斑 + 光伏组件　；参考：《内蒙古大学》2017年硕士论文

【摘要】：随着太阳能发电技术的应用越来越广泛,光伏装机容量持续提升。为了保证光伏电站的发电量,很多降低光伏组件发电效率及使用寿命的负面问题急需得到解决。热斑效应便是最常见的一个,它不但会使组件的发电效率大幅降低,也给电站带来大量潜在隐患,所以对热斑问题展开深入探究及讨论是十分有必要的。本文以达茂旗天润风光电场的部分组件为研究对象,对热斑效应进行了深入的探讨,主要研究内容如下:首先,使用红外热像仪对光伏电站中的部分组件进行热斑检测,统计产生热斑问题的光伏组件和电池片数量,结合电站的实际情况,对导致组件产生热斑效应的各种因素展开讨论,得出热斑形成的主要原因。其次,从被测组件中分别选取2个正常工作的组件和2个发生热斑效应的组件,使用便携式太阳能I-V测试仪对其进行I-V特性测试,将4个组件的实测性能参数进行对比,证明了热斑问题能显著降低组件发电效率。最后,通过MATLAB/Simulink软件建立仿真模型,分别得出组件被部分遮挡情况下不并联与并联旁路二极管时的I-V、P-V特性曲线。仿真结果表明:组件接线盒内旁路二极管对于解决热斑问题起到了关键性作用;同时发现接入旁路二极管使P-V曲线呈现出多峰值特点。这些结果为进一步研究多峰值最大功率点跟踪技术打下了基础。
[Abstract]:With the increasing application of solar power generation technology, the installed capacity of photovoltaic has been continuously improved. In order to ensure the power generation of photovoltaic power plants, many negative problems of reducing the generation efficiency and service life of photovoltaic modules need to be solved urgently. The heat spot effect is the most common one. It not only reduces the generation efficiency of the module greatly, but also brings a lot of potential hidden trouble to the power station. So it is necessary to deeply explore and discuss the heat spot problem. In this paper, some components of Tianrun solar electric field in Damao Banner are taken as the research object, and the heat spot effect is deeply discussed. The main research contents are as follows: firstly, the infrared thermal imager is used to detect the heat spot of some components in photovoltaic power station. According to the actual situation of the power station, the various factors that lead to the heat spot effect of the module are discussed, and the main reasons for the formation of the heat spot are obtained. Secondly, two normal components and two modules with heat spot effect were selected from the tested modules, and the I-V characteristics of the modules were tested by portable solar I-V tester, and the measured performance parameters of the four modules were compared. It is proved that the heat spot problem can significantly reduce the generation efficiency of the module. Finally, the simulation model is established by MATLAB/Simulink software, and the I-V P-V characteristic curves are obtained when the components are partially occluded without parallel and parallel bypass diodes. The simulation results show that the by-pass diode in the junction box plays a key role in solving the heat spot problem, and it is also found that the P-V curve has the characteristics of multiple peaks due to the access to the bypass diode. These results lay a foundation for the further study of multi-peak maximum power point tracking technology.
【学位授予单位】：内蒙古大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP391.9;TM615

【参考文献】