Insulator defect detection under extreme weather based on synthetic weather algorithm and improved YOLOv7

IF 4.4 2区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
High Voltage Pub Date : 2024-12-25 DOI:10.1049/hve2.12513
Yong Yang, Shuai Yang, Chuan Li, Yunxuan Wang, Xiaoqian Pi, Yuxin Lu, Ruohan Wu
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引用次数: 0

Abstract

Efficient and accurate insulator defect detection is essential for maintaining the safe and stable operation of transmission lines. However, the detection effectiveness is adversely impacted by complex and changeable environmental backgrounds, particularly under extreme weather that elevates accident risks. Therefore, this research proposes a high-precision intelligent strategy based on the synthetic weather algorithm and improved YOLOv7 for detecting insulator defects under extreme weather. The proposed methodology involves augmenting the dataset with synthetic rain, snow, and fog algorithm processing. Additionally, the original dataset undergoes augmentation through affine and colour transformations to improve model's generalisation performance under complex power inspection backgrounds. To achieve higher recognition accuracy in severe weather, an improved YOLOv7 algorithm for insulator defect detection is proposed, integrating focal loss with SIoU loss function and incorporating an optimised decoupled head structure. Experimental results indicate that the synthetic weather algorithm processing significantly improves the insulator defect detection accuracy under extreme weather, increasing the mean average precision by 2.4%. Furthermore, the authors’ improved YOLOv7 model achieves 91.8% for the mean average precision, outperforming the benchmark model by 2.3%. With a detection speed of 46.5 frames per second, the model meets the requirement of real-time detection of insulators and their defects during power inspection.

Abstract Image

基于合成天气算法和改进YOLOv7的极端天气下绝缘子缺陷检测
高效、准确的绝缘子缺陷检测对于维护输电线路的安全稳定运行至关重要。然而,复杂多变的环境背景会对探测效果产生不利影响,特别是在极端天气下,会增加事故风险。因此,本研究提出了一种基于综合天气算法和改进YOLOv7的高精度极端天气下绝缘子缺陷检测智能策略。提出的方法包括使用合成雨、雪和雾算法处理来增强数据集。此外,通过仿射变换和颜色变换对原始数据集进行增强,提高模型在复杂功率检测背景下的泛化性能。为了提高恶劣天气条件下绝缘子缺陷的识别精度,提出了一种改进的YOLOv7算法,该算法将焦点损耗与SIoU损耗函数相结合,并结合优化的解耦磁头结构。实验结果表明,综合天气算法处理显著提高了极端天气下绝缘子缺陷检测精度,平均精度提高2.4%。此外,改进的YOLOv7模型的平均精度达到91.8%,比基准模型高出2.3%。该模型检测速度为46.5帧/秒,满足电力巡检中绝缘子及其缺陷实时检测的要求。
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来源期刊
High Voltage
High Voltage Energy-Energy Engineering and Power Technology
CiteScore
9.60
自引率
27.30%
发文量
97
审稿时长
21 weeks
期刊介绍: High Voltage aims to attract original research papers and review articles. The scope covers high-voltage power engineering and high voltage applications, including experimental, computational (including simulation and modelling) and theoretical studies, which include: Electrical Insulation ● Outdoor, indoor, solid, liquid and gas insulation ● Transient voltages and overvoltage protection ● Nano-dielectrics and new insulation materials ● Condition monitoring and maintenance Discharge and plasmas, pulsed power ● Electrical discharge, plasma generation and applications ● Interactions of plasma with surfaces ● Pulsed power science and technology High-field effects ● Computation, measurements of Intensive Electromagnetic Field ● Electromagnetic compatibility ● Biomedical effects ● Environmental effects and protection High Voltage Engineering ● Design problems, testing and measuring techniques ● Equipment development and asset management ● Smart Grid, live line working ● AC/DC power electronics ● UHV power transmission Special Issues. Call for papers: Interface Charging Phenomena for Dielectric Materials - https://digital-library.theiet.org/files/HVE_CFP_ICP.pdf Emerging Materials For High Voltage Applications - https://digital-library.theiet.org/files/HVE_CFP_EMHVA.pdf
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