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Effect of Bouncing Metal Particles on Charge Accumulation on Disc Insulator Surface at Different Temperatures
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Huicun ZHAO, Yu GAO, Wenqu WANG, Huan WANG, Xiaochen YUAN
Insulating Materials | 2022, 55(10) : 39 - 46
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Insulating Materials | 2022, 55(10): 39-46
• Insulation Technology •
Effect of Bouncing Metal Particles on Charge Accumulation on Disc Insulator Surface at Different Temperatures
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Huicun ZHAO, Yu GAO, Wenqu WANG, Huan WANG, Xiaochen YUAN
Affiliations
  • School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Published: 2022-10-20 doi: 10.16790/j.cnki.1009-9239.im.2022.10.007
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Metal particles in gas insulated metal enclosed switchgear (GIS) and gas insulated enclosed transmission line (GIL) can bounce near the insulator under the electric field, which intensifies the charge accumulation and may cause surface flashover in serious cases. In this paper, a 126 kV real size disc insulator was selected as the test sample. A sealed chamber and coaxial structure electrodes were designed, and the effects of bouncing metal particles on the surface charge accumulation behaviors of insulator at different temperatures (23, 40 and 60℃) were studied by using Kelvin electrostatic probe. The results show that the charge accumulation on the nonplanar region is closely related to the motion mode of metal particles at room temperature. And the charge accumulation on the insulator surface is positively correlated with the temperature. As the temperature rise to 60℃, the metal particles moving to the vertical surface of the ground electrode are easy to cause surface flashover, and a large number of heteropolar charges would be accumulated on the non-plane region in the same radial direction as the flashover.

gas insulated equipment  /  insulator  /  surface charge  /  bouncing metal particles  /  temperature
Huicun ZHAO, Yu GAO, Wenqu WANG, Huan WANG, Xiaochen YUAN. Effect of Bouncing Metal Particles on Charge Accumulation on Disc Insulator Surface at Different Temperatures[J]. Insulating Materials, 2022 , 55 (10) : 39 -46 . DOI: 10.16790/j.cnki.1009-9239.im.2022.10.007
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doi: 10.16790/j.cnki.1009-9239.im.2022.10.007
  • Receive Date：2021-10-03
  • Online Date：2025-12-23
  • Published：2022-10-20
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  • Received：2021-10-03
  • Revised：2021-12-09
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    School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
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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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