Identifying PV Module Mismatch Faults by a Thermography-Based Temperature Distribution Analysis
Identifying PV Module Mismatch Faults by a Thermography-Based Temperature Distribution Analysis
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DOI：
10.1109/tdmr.2014.2348195
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发表时间：
2014-12-01
影响因子：
2
通讯作者：
Li, David
中科院分区：
文献类型：
--
作者：
Hu, Yihua;Cao, Wenping;Li, David
光伏（PV）太阳能发电被证明是有效和可持续的，但目前受到相对较高的成本和低转换效率的阻碍。本文针对这两个问题，提出了一种低成本和有效的温度分布分析，识别光伏组件的不匹配故障的热成像。失配故障降低了功率输出并对PV电池造成潜在损坏。本文首先定义了三个故障类别的故障水平，导致不同的终端特性的光伏组件。对三种故障进行了分析和实验研究，并针对不同的故障类型提出了维修建议。所提出的方法是开发联合收割机的电气和热特性的光伏电池受到不同的故障机制，通过仿真和实验测试。此外，故障诊断方法可以被纳入到最大功率点跟踪计划，以转移的PV串的工作点。所开发的技术在通过热成像仪定位故障电池、提供补救措施以及在故障条件下最大化功率输出方面比现有技术有所改进。
Photovoltaic (PV) solar power generation is proven to be effective and sustainable but is currently hampered by relatively high costs and low conversion efficiency. This paper addresses both issues by presenting a low-cost and efficient temperature distribution analysis for identifying PV module mismatch faults by thermography. Mismatch faults reduce the power output and cause potential damage to PV cells. This paper first defines three fault categories in terms of fault levels, which lead to different terminal characteristics of the PV modules. The investigation of three faults is also conducted analytically and experimentally, and maintenance suggestions are also provided for different fault types. The proposed methodology is developed to combine the electrical and thermal characteristics of PV cells subjected to different fault mechanisms through simulation and experimental tests. Furthermore, the fault diagnosis method can be incorporated into the maximum power point tracking schemes to shift the operating point of the PV string. The developed technology has improved over the existing ones in locating the faulty cell by a thermal camera, providing a remedial measure, and maximizing the power output under faulty conditions.