A Method for the Estimation of Missing Strings in Very-Large-Scale Photovoltaic Power Plants

IF 2.5 3区工程技术 Q3 ENERGY & FUELS

IEEE Journal of Photovoltaics Pub Date : 2024-07-29 DOI:10.1109/JPHOTOV.2024.3430977

Tiago Edmir Simão;Bruno Castro Valle;Yago Castro Rosa;Fernando Santos Varela;Arliones Hoeller;Mario de Noronha Neto;Carlos Ernani Fries;Richard Demo Souza

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引用次数: 0

Abstract

This article presents a novel methodology to detect missing strings in very-large-scale photovoltaic (VLSPV) systems, utilizing only data acquired at the stringbox level. Leveraging data analysis and unsupervised machine learning techniques, the proposed method estimates the quantity of missing strings per stringbox by comparing the direct current from each stringbox with neighboring stringboxes within the same region. The approach addresses a gap in the existing literature by providing a solution tailored to the typical instrumentation level of VLSPV plants. The work encompasses an analysis of the energy losses caused by missing strings, quantifying the impact on the overall system performance. Evaluation against real-world data showed a precision of around 90% of the proposed method in detecting missing strings. The findings offer valuable insights for operations and maintenance teams, enabling identification and mitigation of problematic strings in VLSPV plants.

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超大规模光伏电站缺串估算方法

本文提出了一种新颖的方法，仅利用在串箱层面获取的数据来检测超大规模光伏系统（VLSPV）中的缺失串。利用数据分析和无监督机器学习技术，所提出的方法通过比较每个组串盒与同一区域内相邻组串盒的直流电流来估算每个组串盒缺失组串的数量。该方法针对 VLSPV 电站的典型仪表水平，提供了一种量身定制的解决方案，从而填补了现有文献的空白。这项工作包括分析缺失组串造成的能量损失，量化对整个系统性能的影响。根据实际数据进行的评估显示，所提出的方法在检测缺失串方面的精确度约为 90%。这些发现为运营和维护团队提供了宝贵的见解，使他们能够识别和减少 VLSPV 发电站中存在问题的组串。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Journal of Photovoltaics ENERGY & FUELS-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.00

自引率

10.00%

发文量

206

期刊介绍： The IEEE Journal of Photovoltaics is a peer-reviewed, archival publication reporting original and significant research results that advance the field of photovoltaics (PV). The PV field is diverse in its science base ranging from semiconductor and PV device physics to optics and the materials sciences. The journal publishes articles that connect this science base to PV science and technology. The intent is to publish original research results that are of primary interest to the photovoltaic specialist. The scope of the IEEE J. Photovoltaics incorporates: fundamentals and new concepts of PV conversion, including those based on nanostructured materials, low-dimensional physics, multiple charge generation, up/down converters, thermophotovoltaics, hot-carrier effects, plasmonics, metamorphic materials, luminescent concentrators, and rectennas; Si-based PV, including new cell designs, crystalline and non-crystalline Si, passivation, characterization and Si crystal growth; polycrystalline, amorphous and crystalline thin-film solar cell materials, including PV structures and solar cells based on II-VI, chalcopyrite, Si and other thin film absorbers; III-V PV materials, heterostructures, multijunction devices and concentrator PV; optics for light trapping, reflection control and concentration; organic PV including polymer, hybrid and dye sensitized solar cells; space PV including cell materials and PV devices, defects and reliability, environmental effects and protective materials; PV modeling and characterization methods; and other aspects of PV, including modules, power conditioning, inverters, balance-of-systems components, monitoring, analyses and simulations, and supporting PV module standards and measurements. Tutorial and review papers on these subjects are also published and occasionally special issues are published to treat particular areas in more depth and breadth.