高压SF_6气体绝缘套管全工况长期老化性能探讨  

Long-term Ageing Performance Assessment of High Voltage SF_6 Gas Insulated Bushing Under Full Operation Conditions

作　　者：张施令 ZHANG Shiling(Electric Power Research Institute of State Grid Chongqing Electric Power Company, Chongqing 401123, China)

机构地区：[1]国网重庆市电力公司电力科学研究院,重庆401123

出　　处：《绝缘材料》2018年第6期54-59,65,共7页Insulating Materials

基　　金：重庆市基础科学与前沿技术研究(cstc2017jcyj AX0461);重庆市电力公司科技项目(2018渝电科技4#)

摘　　要：通过建立高压套管全工况运行仿真平台,分析了高压交流套管中心导杆集肤效应,对高压套管本体全工况条件下电场分布规律进行了仿真计算。然后开展了高压缩比套管设计及试制,搭建了高压缩比套管老化试验平台,对套管用胶纸复合材料的介电性能、理化性能、力学性能进行了分析。结果表明:高压SF_6气体绝缘套管的内部热源主要包括中心导杆集肤效应发热和芯子本体介质发热两部分;套管双层复合电介质的电场强度及其分布分别与其相对介电常数和介质损耗因数有关;高压缩比套管性能试验可在一定程度上反映实际运行套管的老化特征规律。The simulation platform of high voltage bushing under full operation conditions was constructed to study the skin effect of the central guide bar of high voltage AC bushing and the distribution law of electric field in the high voltage bushing under full operation condition was simulated and calculated. And then the high compression ratio bushing was designed and trial produced, the dielectric properties, the physical and chemical properties, and the mechanical properties of the adhesive paper composite for bushing were analyzed via a compression ratio bushing ageing test platform. The results show that the internal heat sources of the high voltage SF6 gas insulated bushing mainly consist of the skin effect heating of the central guide bar and the heating of the bushing core. The electric field strength and distribution of double-layer composite dielectric in the bushing are related to the relative permittivity and the dielectric loss factor, respectively. The performance test of high compression ratio bushing can reflect the ageing characteristics law of actual running bushing to a certain extent.

关 键 词：高压SF6气体绝缘套管 全工况仿真平台 胶纸绝缘体系 温度和应力分布 

分 类 号：TM216[一般工业技术—材料科学与工程]