高速列车车辆电缆终端局部放电源识别中的图像转换问题

IF 4.4 2区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
High Voltage Pub Date : 2024-09-25 DOI:10.1049/hve2.12487
Kai Liu, Shibo Jiao, Guangbo Nie, Hui Ma, Bo Gao, Chuanming Sun, Dongli Xin, Tapan K. Saha, Guangning Wu
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引用次数: 0

摘要

电缆终端的局部放电(PD)检测对于列车牵引供电系统的安全运行至关重要。然而,在复杂的列车运行环境中,相似的局部放电信号给识别绝缘缺陷带来了困难。因此,本文提出了一种用于电缆终端缺陷 PD 检测的 PD 信号图像变换识别方法,以准确识别具有相似 PD 特性的电缆终端缺陷。在所提出的方法中,首先通过格兰角场(GAF)表示法将原始 PD 信号转换为图像。这可以揭示原始 PD 信号中蕴含的分辨特征,从而有助于区分在时域中表现出相似特征的 PD 源。获得的 PD 信号 GAF 表示(称为 PD GAF 图像)从局部和全局特征中提取出来,用于训练高效的 MobileVIT 模型,然后利用该模型识别电缆终端中类似类型的 PD 信号源。结果表明,所提出的方法在现场实验中达到了 97.5% 的识别准确率,优于其他方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

On image transformation for partial discharge source identification in vehicle cable terminals of high-speed trains

On image transformation for partial discharge source identification in vehicle cable terminals of high-speed trains

Partial discharge (PD) detection of cable terminals is crucial for the safe operation of the traction power system in trains. However, similar PD signals in complex train-operating environments cause difficulty to recognise the insulation defects. Therefore, a PD signal image transformation recognition method is proposed for PD detection of cable terminal defects to identify defects in cable terminals with similar PD characteristics accurately. In the proposed method, the raw PD signals are firstly transformed to images via the Gramian angular field (GAF) representation. This can reveal the discriminative characteristics embedded in the original PD signals and subsequently facilitate differentiating the PD sources, which exhibit similar characteristic in the time domain. The obtained GAF representation of PD signals (named as PD GAF images) is extracted from local and global features to train an efficient MobileVIT model, which is then utilised to identify similar types of PD sources in cable terminals. The results show that the proposed method achieves 97.5% recognition accuracy in the field experiment, which is superior to other methods.

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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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