Simplified I-V Characteristic Tester for Photovoltaic Modules Using a DC-DC Boost Converter
Simplified I-V Characteristic Tester for Photovoltaic Modules Using a DC-DC Boost Converter
复制标题
使用 DC-DC 升压转换器的光伏模块的简化 I-V 特性测试仪
DOI：
10.3390/su9040657
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发表时间：
2017
期刊：
影响因子：
3.9
通讯作者：
A. Mohamed
中科院分区：
文献类型：
--
作者：
T. Khatib;W. Elmenreich;A. Mohamed
本文提出了一种高效的光伏组件I-V曲线测试系统。所提出的系统是基于一个受控的DC-DC升压转换器。使用DC-DC转换器的优点在于，该转换器通常用于PV系统中，以跟踪最大功率点并控制电池的充电。因此，该装置用于I-V曲线提取，而不需要另外的外部装置。通过改变升压转换器开关的触发信号的占空比来提取I-V曲线。所提出的系统已进行了实验测试，使用120 Wp光伏组件。结果表明，该系统能够成功地提取光伏组件的I-V曲线。值得注意的是，测试模块的性能，如通过本研究的系统以及参考系统测量的，被发现在61-67%的范围内的性能在测试中给出。因此，这一结果突出了在设计任何光伏系统时考虑光伏组件的实际性能的测量的重要性，以避免系统尺寸过小。所提出的I-V测试系统可以作为一个简单的工具来诊断光伏系统中的任何不足或低性能问题。
In this paper, an efficient testing system for measuring a PV module’s I-V curve is proposed. The proposed system is based on a controlled DC-DC boost converter. The advantage of using a DC-DC converter is that this converter is typically used in PV systems to track the maximum power point and to control the charging of the battery. Consequently, this device is utilized for I-V curve extraction without the need for further external devices. The I-V curve is extracted by modifying the duty cycle of the triggering signal of the boost converter’s switch. The proposed system has been tested experimentally using a 120 Wp PV module. The results show that the proposed system can successfully extract I-V curves of PV module. Notably, the performance of the tested module, as measured by this study’s system as well as with a reference system, was found to be in the range of 61–67% of the performance given in the datasheet. Hence, this result highlights the importance of considering a measurement of the actual performance of PV modules when designing any PV system so as to avoid an undersized system. The proposed I-V testing system can be used as a simple tool to diagnose any shortages or low performance problems in PV system.