550kV GIS盆式绝缘子小型化设计（一） ——几何形状优化

doi:10.19595/j.cnki.1000-6753.tces.210539

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Abstract In the context of guaranteeing good electrical strength of gas insulated metal enclosed switchgear (GIS), to reduce the consumption of SF₆ gas and downsize equipment’s volume, compact design of a 550 kV basin-type spacer used in real projects was conducted based on the finite element method and numerical optimization method. In the condition of reducing 10% insulation distance between central conductor and sealed tank, by optimizing basin-type spacer’s profile and thickness at two terminal regions, surface electric field of spacer is well-distributed and local concentrated mechanical stresses at the central conductor or sealed tank are much relieved. Comparing with original insulation system, structure of spacer obtained by structure optimization exhibits significantly improved electrical and mechanical properties. The maximum electric field along the concave and the maximum deformation of spacer could decrease by 25.4% and 29.9%, respectively. Moreover, optimized structure after compact design shows approximately a 15% decrease of SF₆ usage and a 6.1% reduction of epoxy composite weight. We believe that the proposed performance improvement strategy for GIS insulation system taking both electrical and mechanical properties into account, thus exhibits good manufacturing feasibility and application potential, which can provide reference for the development of compact and eco-friendly GIS equipment.

Key words： Gas insulated metal enclosed switchgear (GIS) basin-type spacer compact design finite element method (FEM) structure optimization

Received: 17 April 2021

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TM854

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	Wang Chao
	Li Wendong
	Chen Tairan
	Li Wenqiang
	Gong Ruilei
	Zhang Guanjun

Cite this article:

Wang Chao,Li Wendong,Chen Tairan等. Compact Design of 550 kV Basin-Type Spacer in Gas Insulated Switchgear (Part I) —— Structure Optimization[J]. Transactions of China Electrotechnical Society, 2022, 37(7): 1847-1855.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.210539 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I7/1847

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