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ORIGINAL RESEARCH article

Front. Energy Res.

Sec. Smart Grids

Volume 13 - 2025 | doi: 10.3389/fenrg.2025.1622318

Real Defect Partial Discharge Identification Method for Power Cables Joints Based on Integrated PJS-M and GA-SVM Algorithm with Multi-source Fusion

Provisionally accepted
Lingxuan  ZhangLingxuan Zhang*Yiyang  ZhouYiyang Zhou沈炯  姚沈炯 姚Jialuo  ChaiJialuo ChaiYingjing  ChenYingjing ChenZhousheng  ZhangZhousheng Zhang*
  • Shanghai University of Electric Power, Shanghai, China

The final, formatted version of the article will be published soon.

The majority of previous studies on the defects of 10 kV cable intermediate joints have focused on typical defects and relied on single sensors to collect feature quantities, resulting in incomplete characterization of defect features, and consequently, lower defect type recognition rates. Based on the types of real defects that may occur during the actual manufacturing process of cable intermediate joints, this study established three real-type partial discharge (PD) models. A combination of High-Frequency Current Transformer (HFCT) and Ultra High Frequency (UHF) sensors was used to acquire time-domain waveforms, frequency-domain spectra, and Phase-Resolved Partial Discharge (PRPD) patterns from the models, from which feature quantities were extracted. By incorporating an adaptive PJS-M weighting coefficient and a correlation-analysis-based dynamic correction mechanism into the conventional GA-SVM framework, a Genetic Algorithm Weighted Support Vector Machine (GAW-SVM) model was developed. The recognition performance of the proposed model was subsequently compared with several mainstream SVM optimization algorithms reported in recent years. Experimental results show that, under multi-source feature fusion, the GAW-SVM achieved a defect-recognition accuracy of 98.84%, representing improvements of 3.49%, 2.33%, and 1.17% over the GA-SVM, PCA-SVM, and PSO-SVM algorithms, respectively. These findings demonstrate that the proposed method enables high-precision identification of complex real-type defects under multi-source feature conditions, providing a reliable diagnostic basis and technical reference for partial discharge detection in cable intermediate joints.

Keywords: power cables, intermediate joints, true typical defects, Partial discharge, Discharge types, feature extraction

Received: 03 May 2025; Accepted: 04 Aug 2025.

Copyright: © 2025 Zhang, Zhou, 姚, Chai, Chen and Zhang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Lingxuan Zhang, Shanghai University of Electric Power, Shanghai, China
Zhousheng Zhang, Shanghai University of Electric Power, Shanghai, China

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