交流GIS/GIL绝缘子介电功能梯度化设计与金属微粒驱离方法研究  

Dielectric functional gradient design of AC GIS/GIL insulator and research on expelling of metal particles

作　　者：陈田 金洲玉 胡睿智 梁虎成 杜伯学 CHEN Tian;JIN Zhouyu;HU Ruizhi;LIANG Hucheng;DU Boxue(State Grid Jiangxi Electric Power Research Institute,Nanchang 330096,China;School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]国网江西省电力科学研究院,江西南昌330096 [2]天津大学电气自动化与信息工程学院,天津300072

出　　处：《绝缘材料》2024年第10期133-141,共9页Insulating Materials

基　　金：国网江西省电力有限公司科技项目(521820220003)。

摘　　要：气体绝缘金属封闭开关(GIS)设备内部的金属微粒污染物会引起严重的电场畸变,进而诱发绝缘子沿面放电。针对此问题,本文提出一种介电功能梯度绝缘子的金属微粒驱离方法,仿真研究盆式绝缘子周围电场分布以及金属微粒运动特性。结果表明:GIS外壳表面释放的金属微粒受到轴向电场力作用,有朝着绝缘子运动的趋势。叠层式功能梯度(ε_(L)-FGM)绝缘子的介电常数沿径向递减,可在均匀沿面电场分布的同时,使金属微粒所受的电场力方向随轴向电场反转,让金属微粒远离绝缘子运动。然而,ε_(L)-FGM绝缘子GIS使外壳表面电场增强,使金属微粒运动高度较均匀绝缘子上增大约2.7倍。与ε_(L)-FGM绝缘子相比,基于拓扑优化算法设计的具有空间介电常数梯度的ε_(T)-FGM绝缘子减小了金属微粒跳跃高度,具有更佳的电场调控与微粒抑制效果。Metal particle pollutants inside gas-insulated metal enclosed switchgear(GIS)equipment can cause severe electric field distortion,leading to surface discharge of insulators.This paper proposed a method of dielectrically functionally gradient insulator for suppressing metal particles.The electric field distribution around the basin insulator and the motion characteristics of metal particles were simulated.The results show that metal particles released from the shell are affected by the axial electric field force and tend to move towards the insulator.The permittivity distribution of the laminated functionally gradient(ε_(L)-FGM)insulator decreases in the radial direction,which can homogenize the electric field distribution along the insulator surface and drive away the metal particles by reversing the electric force with the axial electric field.However,theε_(L)-FGM insulator enhances the electric field on the surface of the shell,and the jump height of metal particle is 2.7 times higher than those around the uniform insulator.Compared withε_(L)-FGM insulator,theε_(T)-FGM insulator with a spatial permittivity gradient,which designed based on the topology optimization,reduces the jump height of metal particles and performs better effect in regulating the electric field and expelling the particles.

关 键 词：GIS GIL 功能梯度材料 沿面电场均化 金属微粒抑制 拓扑优化 

分 类 号：TM216[一般工业技术—材料科学与工程]