On‐site detection of bypass circuit opening failure in photovoltaic array under power generation operation,Energy Science & Engineering

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On‐site detection of bypass circuit opening failure in photovoltaic array under power generation operation
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-06-05 , DOI: 10.1002/ese3.756
Masaaki Baba ₁ , Daichi Itami ₁ , Noboru Yamada ₁

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To ensure the long‐term reliability of photovoltaic systems (PVSs), periodical inspections are necessary. Despite the risk of severe temperature rise, bypass circuit open‐circuit (BPC‐OC) failure has attracted low research interest compared with other types of failure. This paper presents the pulsed light irradiation (PLI) method for robust BPC‐OC failure detection that eliminates the need to switch off the power generation operation of the PVS. The proposed method detects the BPC‐OC failure of the solar cell string by measuring the modulated current induced by local PLI. Electrical circuit simulations as well as indoor and outdoor experiments are performed to verify the performance of the proposed method. Results of the outdoor experiment show that the PLI method performs well in a real PVS under power generation operation. Finally, the advantages and disadvantages of the proposed method are summarized.

中文翻译：

发电操作下光伏阵列旁路电路开路故障的现场检测

为了确保光伏系统（PVS）的长期可靠性，必须进行定期检查。尽管存在严重的温度升高风险，但与其他类型的故障相比，旁路电路开路（BPC-OC）故障引起了较低的研究兴趣。本文介绍了用于可靠的BPC-OC故障检测的脉冲光照射（PLI）方法，该方法无需关闭PVS的发电操作。所提出的方法通过测量局部PLI感应的调制电流来检测太阳能电池串的BPC-OC故障。进行了电路仿真以及室内和室外实验，以验证所提出方法的性能。室外实验的结果表明，在发电操作下，PLI方法在真实的PVS中表现良好。最后，

更新日期：2020-06-05

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