PV output power enhancement using two mitigation techniques for hot spots and partially shaded solar cells
PV output power enhancement using two mitigation techniques for hot spots and partially shaded solar cells
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DOI：
10.1016/j.epsr.2018.01.002
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发表时间：
2018-05-01
影响因子：
3.9
通讯作者：
Mather, Peter
中科院分区：
文献类型：
--
作者：
Dhimish, Mahmoud;Holmes, Violeta;Mather, Peter
热斑是光伏(PV)电池板中的一个可靠性问题，其中不匹配的电池会显著升温，并降低光伏电池板的输出功率性能。由于热斑导致的高光伏电池温度可能会损坏电池封装并导致二次击穿，这两种情况都会对光伏面板造成永久性损坏。因此，本文提出了两种热点缓解技术的设计与开发，该方法简单、经济、可靠。利用Flier i5热像仪对受检光伏系统中的热点进行了测试，并在不同的环境条件下进行了几个实验，其中在每次观察到的测试中评估了光伏组件的I-V曲线，以分析建议的热点缓解技术激活前后的输出功率性能。对一个受热点影响的光伏组件进行了测试。在激活第一个热点抑制技术后，在高照度水平下的输出功率增加了大约1.25W。然而，第二种缓解技术保证功率的增加等于3.96W。在部分遮挡条件下对附加试验进行了检查。这两种建议的技术都确保了阴影光伏电池温度的降低，从而增加了输出测量功率。(C)2018爱思唯尔B.V.保留所有权利。
Hot spotting is a reliability problem in photovoltaic (PV) panels where a mismatched cell heats up significantly and degrades PV panel output power performance. High PV cell temperature due to hot spotting can damage the cell encapsulate and lead to second breakdown, where both cause permanent damage to the PV panel. Therefore, the design and development of two hot spot mitigation techniques are proposed using a simple, costless and reliable method. The hot spots in the examined PV system was carried out using FLIER i5 thermal imaging camera.Several experiments have been examined during various environmental conditions, where the PV module I-V curve was evaluated in each observed test to analyze the output power performance before and after the activation of the proposed hot spot mitigation techniques. One PV module affected by hot spot was tested. The output power during high irradiance levels is increased by approximate to 1.25 W after the activation of the first hot spot mitigation technique. However, the second mitigation technique guarantee an increase of the power equals to 3.96 W. Additional test has been examined during partial shading condition. Both proposed techniques ensure a decrease in the shaded PV cell temperature, thus an increase in the output measured power. (C) 2018 Elsevier B.V. All rights reserved.