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Research on a repair method of high-voltage cable buffer layer based on graphite injection
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Pengxian SONG1, Hua ZHANG2, Xiaohui ZHU1, Shengchen FANG1, Zhanpeng WEI2, Boxue DU3, Qi LI3, Hao LIU3
Insulating Materials | 2023, 56(10) : 84 - 90
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Insulating Materials | 2023, 56(10): 84-90
• Insulation Technology •
Research on a repair method of high-voltage cable buffer layer based on graphite injection
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Pengxian SONG1, Hua ZHANG2, Xiaohui ZHU1, Shengchen FANG1, Zhanpeng WEI2, Boxue DU3, Qi LI3, Hao LIU3
Affiliations
  • 1Tianjin Electric Power Research Institute of State Grid Tianjin Electric Power Company, Tianjin 300384, China
  • 2State Grid Tianjin Cable Company, Tianjin 300171, China
  • 3School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Published: 2023-10-20 doi: 10.16790/j.cnki.1009-9239.im.2023.10.011
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In recent years, ablation failure of high-voltage cable buffer layer occurs frequently. In order to solve the problem, this paper established a simulation model for XLPE cables and studied the electric field distribution characteristics of buffer layers under different resistivity. Based on the fault mechanism, a buffer layer repair scheme and a full set of on-site repair process were proposed. Repair tests were conducted on 220 kV high-voltage cross-linked polyethylene fault cables with a length of 1.2 m and 6 m, respectively. The repair effect was evaluated from the perspectives of contact resistance and capacitance current. The results show that with the increase of volume resistivity of the buffer layer, the electric field distortion between the buffer layer and the aluminum sheath is serious, which is easy to cause partial discharge and lead to cable failure. With the decrease of volume resistivity of the buffer layer, the electrical connection between the buffer layer and the aluminum sheath gradually recovers, and the electric field distribution tends to be uniform. After the injection of conductive repair medium, the resistance between the buffer layer and the aluminum sheath decreases by 41.67%, indicating that the electrical connection performance between the buffer layer and the aluminum sheath has been restored.

buffer layer  /  electric field distortion  /  conductive repair medium  /  outcome evaluation
Pengxian SONG, Hua ZHANG, Xiaohui ZHU, Shengchen FANG, Zhanpeng WEI, Boxue DU, Qi LI, Hao LIU. Research on a repair method of high-voltage cable buffer layer based on graphite injection[J]. Insulating Materials, 2023 , 56 (10) : 84 -90 . DOI: 10.16790/j.cnki.1009-9239.im.2023.10.011
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.10.011
  • Receive Date：2022-08-30
  • Online Date：2025-11-24
  • Published：2023-10-20
Article Data
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History
  • Received：2022-08-30
  • Revised：2022-10-23
Funding
Affiliations
    1Tianjin Electric Power Research Institute of State Grid Tianjin Electric Power Company, Tianjin 300384, China
    2State Grid Tianjin Cable Company, Tianjin 300171, China
    3School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.10.011
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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