缺陷对交流1 100kV GIL三支柱绝缘子电场分布影响的仿真

doi:10.19595/j.cnki.1000-6753.tces.L90194

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Abstract Defects and conductive particles will seriously distort the electric field distribution of tri-post insulators in GIL, and even lead to breakdown. In this paper, the possible defects and their sources in UHV GIL were analyzed, and the influence of defects, including interface defects, inner void and conductive particles, on the electric field distribution of the tri-post insulator was calculated by the COMSOL Multiphysics software. The results show that interface defects on metal insert and center conductor surface have the similar effects. The longer and thinner the interface defects are, the higher the maximum value of field is. As for the inner voids, the size seems to have small impact on the electric field distribution, but the location closer to the metal insert has more damage to the insulation. Attached conductive metal particles can significantly enhance the electric field, but has influence on the maximum electric field value, and the larger the size, the larger the range of electric field distortion. The larger size and shorter height of suspended conductive particles cause more serious distortion, and the maximum value of field strength increases when the particles are closer the sphere zone. Among the defects, conductive particles are the most harmful to insulation, followed by interface defects.

Key words： Ultra high voltage gas insulated metal enclosed transmission line tri-post insulator interface defects inner void conductive particle

Received: 30 June 2020

PACS:

TM216

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	Articles by authors
	Liu Peng
	Wu Zehua
	Zhu Sijia
	Xu Jiazong
	Liu Qingdong
	Peng Zongren

Cite this article:

Liu Peng,Wu Zehua,Zhu Sijia等. Simulation on Electric Field Distribution of 1 100kV AC Tri-Post Insulator Influenced by Defects[J]. Transactions of China Electrotechnical Society, 2022, 37(2): 469-478.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L90194 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I2/469

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