Repair of defects in buffer layer of high voltage cable based on additive liquid silicone rubber material
Abstract In recent years, the issue of defects in the buffer layers of high‐voltage cables has garnered significant attention due to their widespread occurrence and the substantial potential damages they pose. Although progress has been made in understanding the mechanisms behind these defects and i...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-04-01
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| Series: | High Voltage |
| Online Access: | https://doi.org/10.1049/hve2.70021 |
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| _version_ | 1849713231925346304 |
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| author | Wenqing Zhou Qihao Xiao Yanyang Yin Xiaodong Liu Licheng Li Gang Liu |
| author_facet | Wenqing Zhou Qihao Xiao Yanyang Yin Xiaodong Liu Licheng Li Gang Liu |
| author_sort | Wenqing Zhou |
| collection | DOAJ |
| description | Abstract In recent years, the issue of defects in the buffer layers of high‐voltage cables has garnered significant attention due to their widespread occurrence and the substantial potential damages they pose. Although progress has been made in understanding the mechanisms behind these defects and in developing detection methods, effective repair solutions remain limited. This study addresses this challenge by proposing a novel repair material: a two‐component, additive liquid silicone rubber‐based compound that utilises vinyl silicone oil as its base. The electrical, thermal, and mechanical properties of the cured silicone‐based repair fluid are thoroughly analysed. To evaluate its effectiveness, an experimental platform was constructed using a 17‐m‐long, 110 kV retired cable with known buffer layer defects. A specialised injection process was developed to facilitate the application of the repair fluid. The thermal characteristics, buffer layer voltage distribution, and partial discharge behaviour of the defective cable were analysed both before and after the repair. The results indicate that following the repair, the cable's heat dissipation capacity under full load increased by 6.25%. Additionally, the buffer layer voltage at the rated voltage (U0) decreased from 1.97 to 0.34 V, representing an 82.74% reduction. Notably, no partial discharge signals exceeding background noise were detected post‐repair. This study demonstrates the effectiveness of the addition‐cure liquid silicone rubber‐based semi‐conductive material in repairing cable buffer layer defects and provides valuable experimental support for its practical application in engineering. |
| format | Article |
| id | doaj-art-7b2a2ba5cdfe44cd8e8530e95fe2c2f2 |
| institution | DOAJ |
| issn | 2397-7264 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | High Voltage |
| spelling | doaj-art-7b2a2ba5cdfe44cd8e8530e95fe2c2f22025-08-20T03:14:01ZengWileyHigh Voltage2397-72642025-04-0110231632410.1049/hve2.70021Repair of defects in buffer layer of high voltage cable based on additive liquid silicone rubber materialWenqing Zhou0Qihao Xiao1Yanyang Yin2Xiaodong Liu3Licheng Li4Gang Liu5School of Electric Power Engineering South China University of Technology Guangzhou ChinaSchool of Electric Power Engineering South China University of Technology Guangzhou ChinaSchool of Electric Power Engineering South China University of Technology Guangzhou ChinaGuangzhou Nanyang Cable Group Co., Ltd. Guangzhou ChinaSchool of Electric Power Engineering South China University of Technology Guangzhou ChinaSchool of Electric Power Engineering South China University of Technology Guangzhou ChinaAbstract In recent years, the issue of defects in the buffer layers of high‐voltage cables has garnered significant attention due to their widespread occurrence and the substantial potential damages they pose. Although progress has been made in understanding the mechanisms behind these defects and in developing detection methods, effective repair solutions remain limited. This study addresses this challenge by proposing a novel repair material: a two‐component, additive liquid silicone rubber‐based compound that utilises vinyl silicone oil as its base. The electrical, thermal, and mechanical properties of the cured silicone‐based repair fluid are thoroughly analysed. To evaluate its effectiveness, an experimental platform was constructed using a 17‐m‐long, 110 kV retired cable with known buffer layer defects. A specialised injection process was developed to facilitate the application of the repair fluid. The thermal characteristics, buffer layer voltage distribution, and partial discharge behaviour of the defective cable were analysed both before and after the repair. The results indicate that following the repair, the cable's heat dissipation capacity under full load increased by 6.25%. Additionally, the buffer layer voltage at the rated voltage (U0) decreased from 1.97 to 0.34 V, representing an 82.74% reduction. Notably, no partial discharge signals exceeding background noise were detected post‐repair. This study demonstrates the effectiveness of the addition‐cure liquid silicone rubber‐based semi‐conductive material in repairing cable buffer layer defects and provides valuable experimental support for its practical application in engineering.https://doi.org/10.1049/hve2.70021 |
| spellingShingle | Wenqing Zhou Qihao Xiao Yanyang Yin Xiaodong Liu Licheng Li Gang Liu Repair of defects in buffer layer of high voltage cable based on additive liquid silicone rubber material High Voltage |
| title | Repair of defects in buffer layer of high voltage cable based on additive liquid silicone rubber material |
| title_full | Repair of defects in buffer layer of high voltage cable based on additive liquid silicone rubber material |
| title_fullStr | Repair of defects in buffer layer of high voltage cable based on additive liquid silicone rubber material |
| title_full_unstemmed | Repair of defects in buffer layer of high voltage cable based on additive liquid silicone rubber material |
| title_short | Repair of defects in buffer layer of high voltage cable based on additive liquid silicone rubber material |
| title_sort | repair of defects in buffer layer of high voltage cable based on additive liquid silicone rubber material |
| url | https://doi.org/10.1049/hve2.70021 |
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