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Effect of Power Frequency High Voltage Applied Time on Deterioration of Composite Insulator Core Rod in Different Humid Environment
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Hui LIU1, Hao SHEN1, Yifan FU2, Xinming MA2, Minjun ZHANG2, Fuxing YANG2, Minfu LIAO2
Insulating Materials | 2022, 55(7) : 87 - 92
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Insulating Materials | 2022, 55(7): 87-92
• Insulation Technology •
Effect of Power Frequency High Voltage Applied Time on Deterioration of Composite Insulator Core Rod in Different Humid Environment
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Hui LIU1, Hao SHEN1, Yifan FU2, Xinming MA2, Minjun ZHANG2, Fuxing YANG2, Minfu LIAO2
Affiliations
  • 1State Grid Shandong Electric Power Research Institute, Jinan 250003, China
  • 2Dalian University of Technology, Dalian 116024, China
Published: 2022-07-20 doi: 10.16790/j.cnki.1009-9239.im.2022.07.013
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Composite insulators have been widely used in power transmission lines. In recent years, there are many grid accidents caused by insulator core rod deterioration. It is urgent to find out the influence factors and rules of composite insulator core rod deterioration. In order to study the influences of different voltage applied time and environmental humidity on the core rod deterioration of composite insulator under uniform electric field, the electric field distribution generated by the dielectric barrier discharge method was simulated and analyzed. An electrical ageing experiment platform was designed and built, and the core rod samples were conducted 200 h, 400 h, and 800 h of electrical ageing tests at power frequency under dry and humid environments. The physical and chemical properties of new sample and the aged samples were tested, and the corresponding influence laws were analyzed. The results show that after electrical ageing, the epoxy resin content in the core rod decreases. When the ageing time is less than 400 h, the epoxy resin content under humid and dry environments has little difference. When the ageing time increases to 800 h, the epoxy resin content under humid environment is significantly lower than that under dry environment.

composite insulators  /  epoxy resin  /  core rod deterioration  /  electrical ageing
Hui LIU, Hao SHEN, Yifan FU, Xinming MA, Minjun ZHANG, Fuxing YANG, Minfu LIAO. Effect of Power Frequency High Voltage Applied Time on Deterioration of Composite Insulator Core Rod in Different Humid Environment[J]. Insulating Materials, 2022 , 55 (7) : 87 -92 . DOI: 10.16790/j.cnki.1009-9239.im.2022.07.013
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2022.07.013
  • Receive Date：2021-07-20
  • Online Date：2025-12-23
  • Published：2022-07-20
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  • Received：2021-07-20
  • Revised：2021-08-31
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Affiliations
    1State Grid Shandong Electric Power Research Institute, Jinan 250003, China
    2Dalian University of Technology, Dalian 116024, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2022.07.013
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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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