本文選題：熱斑 + 光伏組件��； 參考：《內(nèi)蒙古大學》2017年碩士論文

【摘要】：隨著太陽能發(fā)電技術的應用越來越廣泛,光伏裝機容量持續(xù)提升。為了保證光伏電站的發(fā)電量,很多降低光伏組件發(fā)電效率及使用壽命的負面問題急需得到解決。熱斑效應便是最常見的一個,它不但會使組件的發(fā)電效率大幅降低,也給電站帶來大量潛在隱患,所以對熱斑問題展開深入探究及討論是十分有必要的。本文以達茂旗天潤風光電場的部分組件為研究對象,對熱斑效應進行了深入的探討,主要研究內(nèi)容如下:首先,使用紅外熱像儀對光伏電站中的部分組件進行熱斑檢測,統(tǒng)計產(chǎn)生熱斑問題的光伏組件和電池片數(shù)量,結合電站的實際情況,對導致組件產(chǎn)生熱斑效應的各種因素展開討論,得出熱斑形成的主要原因。其次,從被測組件中分別選取2個正常工作的組件和2個發(fā)生熱斑效應的組件,使用便攜式太陽能I-V測試儀對其進行I-V特性測試,將4個組件的實測性能參數(shù)進行對比,證明了熱斑問題能顯著降低組件發(fā)電效率。最后,通過MATLAB/Simulink軟件建立仿真模型,分別得出組件被部分遮擋情況下不并聯(lián)與并聯(lián)旁路二極管時的I-V、P-V特性曲線。仿真結果表明:組件接線盒內(nèi)旁路二極管對于解決熱斑問題起到了關鍵性作用;同時發(fā)現(xiàn)接入旁路二極管使P-V曲線呈現(xiàn)出多峰值特點。這些結果為進一步研究多峰值最大功率點跟蹤技術打下了基礎。
[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.
【學位授予單位】：內(nèi)蒙古大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP391.9;TM615

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