40.5kV SF6灭弧室电场优化设计

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关键词： SF6 灭弧室断口；电场分布；优化；均压结构

中图分类号：TM595文献标志码：A文章编号：2095-8188（2025）07-0039-05

DOI： 10.16628/j .cnki.2095-8188.2025.07.006

Abstract：An optimization design is carried out to address the insulation problem of SF6 interrupter for a 40.5kVgas-insulated ring main unit.The finite element software is usedto simulate theelectric fieldof the moving and staticcontact structure inthe40.5kV SF6arc-extinguishing chamber.The simulationresults show that the electric field intensity isconcentratedatthearcoftheendofthemovingcontactandthearcoftheouterendof the staticarccontact，andtheelectric field distribution between themovingandstatic contactsisextremely unbalanced.Electric field simulationsof thearc-extinguishing chamberare conductedwithand without a voltageequalizing structureatdiffrent opening distances，and with thevoltage-equalizing structureatdiferent positions. Theinfluenceof theseconditions onthe electricfield distributionof the arc-extinguishing chamber isanalyzed，and the structural optimizationof thearc-extinguishing chamber is completed.After optimization，themaximum electric field intensity at the sampling boundary of the moving contact end decreases by up to 30.45% .Therationality of the structural optimization is verified through insulation tests.The test results show that adding a voltage-equalizing structure and arranging it at an appropriate position can meet the interrupter insulation requirements of the 40.5kV （204号 voltage level without increasing the opening distance.

Keywords： SF6 interrupter；electric field distribution；optimization；voltage-equalizing structure

0 引言

绝缘设计是灭弧室设计最基本的问题。（剩余4355字）