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Influence of Isosceles Triangle Interface Defects on Electric Field Distribution of Composite Insulators
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Hao SHEN1, Hui LIU1, Xinming MA2, Yifan FU2, Minjun ZHANG2, Fuxing YANG2, Hao ZHANG2, Minfu LIAO2
Insulating Materials | 2022, 55(8) : 90 - 96
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Insulating Materials | 2022, 55(8): 90-96
• Test and Analysis •
Influence of Isosceles Triangle Interface Defects on Electric Field Distribution of Composite Insulators
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Hao SHEN1, Hui LIU1, Xinming MA2, Yifan FU2, Minjun ZHANG2, Fuxing YANG2, Hao ZHANG2, Minfu LIAO2
Affiliations
  • 1State Grid Shandong Electric Power Research Institute, Jinan 250003, China
  • 2School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
Published: 2022-08-20 doi: 10.16790/j.cnki.1009-9239.im.2022.08.015
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The faults caused by internal interface defects of composite insulators is a great threat to the safe and stable operation of power grid. In order to study the influence of different shapes of defects and their sizes and moisture immersion on the electric field distribution of insulators, an isosceles triangle defect model including tip curvature radius parameter was proposed. A 3D model of 500 kV composite insulator was established, and the electric field of defects with different shapes and sizes and moisture ratio were simulated and compared by the COMSOL. The results show that the isosceles triangle defect model can better reflect the tendency of defect developing to the low voltage side. The tip curvature radius of defect has no obvious effect on the air gap, but there is a point effect in the water gap. With the increase of moisture content in the defect, the maximum electric field strength increases gradually. Under the action of point effect and moisture immersion, the electric field strength at the tip of low voltage side is distorted severely, which increases the possibility of partial discharge and accelerates its development to the low voltage side.

composite insulator  /  interface defect  /  moisture immersion  /  electric field distribution  /  point effect
Hao SHEN, Hui LIU, Xinming MA, Yifan FU, Minjun ZHANG, Fuxing YANG, Hao ZHANG, Minfu LIAO. Influence of Isosceles Triangle Interface Defects on Electric Field Distribution of Composite Insulators[J]. Insulating Materials, 2022 , 55 (8) : 90 -96 . DOI: 10.16790/j.cnki.1009-9239.im.2022.08.015
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Year 2022 volume 55 Issue 8
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2022.08.015
  • Receive Date：2021-07-28
  • Online Date：2025-12-23
  • Published：2022-08-20
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  • Received：2021-07-28
  • Revised：2021-09-09
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    1State Grid Shandong Electric Power Research Institute, Jinan 250003, China
    2School of Electrical Engineering, Dalian 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.2022.08.015
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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
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Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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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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