A comprehensive review on common materials, detection methods of insulation deterioration, correlated ambient aging factors, and novel material developments of PV backsheet has been presented in this paper.
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For precise analysis, optimizing the device structure, fault detection, and monitoring of the performance of the PV systems, a reliable model of the PV cell is required [40, 41, 42]. The
The experiments and simulation tests prove that the presented defect detection approach is superior to the conventional methods, and the proposed method is more stable and efficient.
Key words: photovoltaic bracket, numerical simulation, overall stability, fixed, failure mode. 摘要: 为研究固定式光伏支架在风荷载作用下的受力性能及破坏模式,设计并制作
To prevent water penetration, the bottom of PV cell is filled with insulation material (Fig. 1.1). Fig. 1.1. Structure of PV module. the induced current in the metal frame and PV bracket would
The method improves the accuracy of fault detection of the solar cell, enhances the reliability and economical benefits of the photovoltaic power station, and realizes online
Recently, detection and identification of faults in photovoltaic (PV) system applications have been attracting researchers worldwide. Some of them have investigated the causes of potential faults
In this regard, artificial feature extraction and deep learning have been used for defect detection. The former [8] mostly carries out defect detection for a certain fixed feature,
Ultraviolet fluorescence (UV-F) has been shown to be an effective method for easily detecting cracks in PV modules [1]. We have developed a system for fast nighttime UV-F imaging (<3
To meet the data requirements, Su et al. 18 proposed PVEL-AD dataset for photovoltaic panel defect detection and conducted several subsequent studies 19, 20, 21 based on this dataset. In recent years, the PVEL-AD dataset has become a benchmark for photovoltaic (PV) cell defect detection research using electroluminescence (EL) images.
Efforts have been made to develop models capable of real-time defect detection, with some achieving impressive accuracy and processing speeds. However, existing approaches often struggle with feature redundancy and inefficient representations of defects in photovoltaic panels.
Therefore, PV modules detection using imaging spectroscopy data should focus on the physical characteristics and the spectral uniqueness of PV modules. PV modules commonly consist of several layers, including fully transparent glass covers for protection, highly transparent EVA films, and the core PV cell.
Machine vision-based approaches have become an important direction in the field of defect detection. Many researchers have proposed different algorithms 11, 15, 16 for photovoltaic panel defect detection by creating their own datasets.
The excellent performance of YOLOv5 in the field of visual detection, along with its successful application in industry defect detection, proves that it would be a good choice as the baseline network for photovoltaic panel defect detection.
The Infrared (IR) imaging is a contactless technique for PV modules testing. The defected modules can generate the hot spot effect, which can be imaged by IR camera due to the relatively high temperature in the defected area. However, such a method can only detect the anomalous temperature and cannot effectively distinguish the defect types.
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